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Technical Information

Load Sensing Steering Units

OSPB/C/F/D/L LS, OLS Priority Valves, OSQ Flow Amplifiers

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Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Revision history Table of revisions

Date Changed Rev

April 2021 Changed document number from 'BC00000009' and '11007611' to 'BC152886483962' 1003

October 2019 Data and image revisions throughout 0901

August 2018 Fixed typo, and updated OLS 160 dimension drawing. 0801

June 2017 Overview regarding steering components; Literature reference table: Technical data

chapter; Port thread versions; Dimensions for OSPC/OSPF 230; Specification table for non catalogue numbers of Danfoss Priority Valves; and Flow and pressure table

July 2016 Updated text under OSPD LS: Steering unit load sensing dynamic with 2 rotary meters and

with integrated valve functions

April 2016 Updated to Engineering Tomorrow design 0503

February 2016 Update image OSPC LS/LSR and OSPF LS for OLS, OSPCX LS for OSQ 0502

September 2014 Various updates EA

February 2014 Converted to Danfoss layout - DITA CMS DA

August 2013 OSPQ deleted CA

November 2009 Steering column deleted BA

May 2006 First version AA

0701

0601

2 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

A wide range of steering components

Conversion factors........................................................................................................................................................................... 6

Survey of literature on Danfoss steering components.......................................................................................................6

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

Versions................................................................................................................................................................................................7

OSPB LS: Steering unit with no valve functions...............................................................................................................8

OSPC LS: Steering unit load sensing with integrated valve functions for in line priority valve OLS............ 9

OSPC LS: Steering unit load sensing with integrated valve functions for flange on priority valve

OLSA.........................................................................................................................................................................................9

OSPC LSR: Steering unit load sensing dynamic with integrated valve functions............................................. 10

OSPF LS : Steering unit full drain load sensing dynamic and with integrated valve functions....................10

OSPD LS: Steering unit load sensing dynamic with 2 rotary meters and with integrated valve

functions.............................................................................................................................................................................. 11

OSPL LS:........................................................................................................................................................................................12

OSPBX LS, OSPCX LS and OSPLX LS: Steering units load sensing for flow amplifiers......................................14

Code numbers and weights.......................................................................................................................................................15

OSPB load sensing static non-reaction steering units................................................................................................ 15

OSPB load sensing dynamic non-reaction steering units..........................................................................................15

OSPC load sensing static non-reaction steering unit.................................................................................................. 16

OSPC load sensing dynamic non-reaction steering units..........................................................................................16

OSPC load sensing dynamic reaction steering units................................................................................................... 17

OSPF load sensing dynamic non-reaction steering units..........................................................................................17

OSPD load sensing non-reaction steering units............................................................................................................18

OSPL load sensing static non-reaction steering units.................................................................................................19

OSPL load sensing dynamic non-reaction steering units.......................................................................................... 19

OSPBX and OSPLX load sensing static steering units for OSQ static..................................................................... 20

OSPCX load sensing dynamic steering units for OSQ dynamic...............................................................................20

Specification table for non catalogue numbers of LS Steering Units......................................................................... 21

Technical data................................................................................................................................................................................. 22

Displacement, flow and pressure: OSPB LS, OSPC LS, OSPC LSR.............................................................................22

Displacement, flow and pressure: OSPF LS.....................................................................................................................24

Displacement, flow and pressure: OSPD LS.................................................................................................................... 24

Displacement, flow and pressure: OSPL LS, OSPBX LS, OSPCX LS, OSPLX LS..................................................... 25

Valve functions in OSPC, OSPF, OSPD and OSPL LS steering units..............................................................................26

Pilot pressure relief valve; (P - T, Qp) characteristic......................................................................................................26

Shock valves............................................................................................................................................................................... 26

Suction valves............................................................................................................................................................................ 26

Check valves............................................................................................................................................................................... 27

Port thread versions for OSPB LS, OSPC LS/LSR, OSPF LS, OSPD LS/LSR, OSPL LS, OSPBX LS, OSPCX

LS, OSPLX LS.............................................................................................................................................................................28

Dimensions.......................................................................................................................................................................................31

OSPB LS for OLS, OSPBX LS for OSQ...................................................................................................................................31

OSPC LS/LSR and OSPF LS for OLS, OSPCX LS for OSQ............................................................................................... 33

OSPD LS/LSR for OLS............................................................................................................................................................... 35

OSPL LS for OLS and OSPLX LS for OSQ............................................................................................................................36

OSPL 1200 LS for OLS..............................................................................................................................................................38

Valve Block OVPL

Code numbers and weight.........................................................................................................................................................40

Technical data................................................................................................................................................................................. 43

Common data............................................................................................................................................................................43

Valve functions................................................................................................................................................................................43

Shock valves............................................................................................................................................................................... 44

Suction valves............................................................................................................................................................................ 44

Check valve.................................................................................................................................................................................44

Backpressure valve...................................................................................................................................................................45

Installation........................................................................................................................................................................................46

Dimensions.......................................................................................................................................................................................46

Danfoss | April 2021 BC152886483962en-001003 | 3

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Contents

Angle Block OVR

Version............................................................................................................................................................................................... 48

Code numbers and weight.........................................................................................................................................................48

Installation........................................................................................................................................................................................48

Dimensions.......................................................................................................................................................................................49

Priority Valves OLSA, OLS, and OLSP

OLSA 40/80................................................................................................................................................................................. 51

OLS 40/80 and OLS 120.......................................................................................................................................................... 52

OLS 160.........................................................................................................................................................................................53

OLSP 80........................................................................................................................................................................................ 54

OLS 320.........................................................................................................................................................................................55

OLS 320 without pilot pressure relief valve.................................................................................................................... 56

System sizing...................................................................................................................................................................................57

Code numbers and weights.......................................................................................................................................................57

OLS/OLSA static priority valves for load sensing static steering units.................................................................. 57

OLS/OLSA static priority valves for load sensing statics steering units................................................................ 58

OLS/OLSA dynamic priority valves for load sensing dynamic steering units.....................................................58

OLS/OLSA dynamic priority valves for load sensing dynamic steering units.....................................................59

OLS dynamic priority valves for OSPF LS and OSPU LS dynamic steering units................................................60

Specification table for non catalogue numbers of Danfoss Priority Valves..............................................................62

Technical data................................................................................................................................................................................. 63

Max. pressure on connections............................................................................................................................................. 63

Pressure drop in priority valves........................................................................................................................................... 63

Pressure drop P-EF for static priority valves....................................................................................................................63

Pressure drop P-EF for dynamic priority valves............................................................................................................. 65

Pressure drop P-EF for OLSP static priority valves........................................................................................................ 67

Pressure drop P-EF for OLSP dynamic priority valves..................................................................................................68

Pressure drop P-EF for OLS 320 static priority valves.................................................................................................. 68

Pressure drop P-EF for OLS 320 dynamic priority valves............................................................................................69

OLS 160 and OLS 320, pilot pressure relief valve (P - T, Qp) characteristics........................................................69

Dimensions.......................................................................................................................................................................................71

OLSA..............................................................................................................................................................................................71

OLS 40, OLS 80...........................................................................................................................................................................73

OLS 120.........................................................................................................................................................................................75

OLS 160.........................................................................................................................................................................................76

OLSP 80........................................................................................................................................................................................ 77

OLS 320 in-line...........................................................................................................................................................................78

Flow Amplifiers OSQA and OSQB

OSQA and OSQB static............................................................................................................................................................79

Code numbers and weights.......................................................................................................................................................80

OSQA and OSQB static flow amplifiers for load sensing static steering units....................................................80

Specification table for non catalogue numbers of Danfoss Flow Amplifier.............................................................81

Technical data................................................................................................................................................................................. 82

Flow and pressure.................................................................................................................................................................... 82

Total displacement of Steering System............................................................................................................................82

Installation...................................................................................................................................................................................82

Valve functions in the flow amplifiers...............................................................................................................................82

Priority valve...............................................................................................................................................................................82

OSQ pilot pressure relief valve (HP - HT, Qp) characteristic...................................................................................... 83

Back pressure valve..................................................................................................................................................................84

Shock valves............................................................................................................................................................................... 85

Suction valves............................................................................................................................................................................ 85

Dimensions.......................................................................................................................................................................................86

OSQA.............................................................................................................................................................................................86

OSQB............................................................................................................................................................................................. 88

4 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

A wide range of steering components

Danfoss is one of the largest producers in the world of steering components for hydrostatic steering systems on off-road vehicles. Danfoss offers steering solutions both at component and system levels. Our product range makes it possible to cover applications of all types, ranging from ordinary 2 wheel steering (also known as Ackermann steering) to articulated steering, automatic steering (for example, by sensor) and remote controlled steering via satellite. We can offer more than 1,800 different steering units and 250 different priority valves categorized in types, variants and sizes.

Danfoss offers:

For hydrostatic steering systems:

Product type Displacement Rated Flow Steering Pressure Mini steering units

Steering units

Priority valves

Pilot operated flowamplifiers (factors: 4, 5, 8, or 10)

Pilot operated steering valves

32 – 100 cm3/rev [1.95 – 6.10 in3/rev]

40 – 1200 cm3/rev [2.44 to 73.2 in3/rev]

–

– 240 and 400 l/min [63.4 and

–

max. 20 l/min [5.28 US gal/min]

max. 100 l/min [26.4 US gal/min]

40, 80, 120, 160, 320 l/min [10.6, 21.1, 31.7, 42.3, 84.5 US gal/min]

105.7 US gal/min]

max. 100 l/min [26.4 US gal/min]

max. 150 bar [2180 psi]

max. 240 bar [3481 psi]

max. 350 bar [5076 psi]

max. 240 bar [3480 psi]

max. 250 bar [3625 psi]

For electrohydraulic steering systems

Product type Displacement Rated flow Steering pressure Pilot operated steering

valves Integrated electrical

operated steering valve Electrical operated

steering valve

- 100 l/min [26.4 US gal/min] 250 bar [3625 psi]

100 - 500 cm3/rev [6.10 - 30.51 in3]

- 70 l/min [18.5 US gal/min] 210 bar [3045 psi]

50 l/min [13.2 US gal/min] 210 bar [3045 psi]

Danfoss | April 2021 BC152886483962en-001003 | 5

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

A wide range of steering components

Characteristic features for steering units:

Low steering torque: from 0.5 to 3 N•m in normal steering situations

•

Low noise level

•

Low pressure drop

•

Many types available: Open center Non-reaction, Open center Reaction, Power Beyond, Closed center

•

Non-reaction, Load Sensing, Load Sensing Reaction One or more built-in valve functions: relief valve, shock valves, suction valves, non-return valve in P-

•

line and LS-line Optional port connections according to ISO, SAE or DIN standards

•

Characteristics for EH steering systems with OSPE, EHPS, and EHi:

Possibility of GPS, row sensor, variable steering ratio and joystick steering

•

Possibility of manual steering even on very heavy vehicles

•

EHPS:

•

High steering pressure requiring smaller cylinders and flow

‒

Low pilot pressure and flow giving extremely low noise in the cabin

‒

Combined with Danfoss PVG 32 proportional valve

‒

Conversion factors

1 N•m = [8.851 lbf•in] 1 l = [0.264 US gal] 1 N = [0.2248 lbf] 1 bar = [14.5 psi] 1 mm = [0.0394 in] °F = [1.8°C + 32] 1 cm3 = [0.061 in3]

Survey of literature on Danfoss steering components

Detailed data on all Danfoss steering components and accessories can be found in our steering component catalogs, which is divided in to the following individual sub catalogs:

General information Steering components

Technical data on mini steering units OSPM Technical data on open center, and closed center

steering units Technical data on load sensing steering units, priority

valves and flow amplifiers Technical data on load sensing steering unit with

amplification Technical data on hydraulic and EH pilot operated

steering valves, electrical actuation modules and appropriate steering units.

Technical data on combined steering unit/EH steering valves and steering wheel sensors

Technical data on electrohydraulic steering valves EHi Technical data on steering wheel sensors SASA

OSPB, OSPC, and OSPD

OSPB, OSPC, OSPF, OSPD, OSPL, OSPBX, OSPLX, OVPL, OLS and OSQ

OSPU

EHPS, EHPS w. OLS 320, PVE for EHPS and OSPCX

OSPE

For technical information on individual variants, please contact the Danfoss Sales Organization.

6 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

Versions

Load sensing

In load sensing steering systems both the steering system and the working hydraulics can be supplied with oil from the same pump, using a load sensing pump, also delivers the potential for energy saving.

Load sensing steering units have an extra connection for load sensing (LS), so that a load pressure signal can be directed via the steering unit to a Danfoss priority valve and/or an LS pump. The load sensing signal controls the oil flow from the priority valve (and/or the LS pump) to the steering unit. The LS connection is open to tank when the steering unit is in the neutral position.

Load sensing static

Load sensing static steering units require load sensing static priority valves and/or load sensing static variable displacement pumps. Load sensing static steering systems have no oil flow in the LS connection when the steering unit is in neutral position.

Load sensing dynamic

Load sensing dynamic steering units require load sensing dynamic priority valves and/or load sensing dynamic variable displacement pumps. Load sensing dynamic steering systems have a constant oil flow in the LS connection in the direction of the steering unit even when the steering unit is in neutral position.

Reaction

With reaction steering units any external forces acting on the steered wheels result in a corresponding movement of the steering wheel when the driver is not steering the vehicle.

Non-reaction

With non-reaction steering units there is no corresponding movement of the steering wheel when the driver is not steering the vehicle

Danfoss | April 2021 BC152886483962en-001003 | 7

150-301.11

TLSLS

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPB LS: Steering unit with no valve functions

OSPB LS (OLS)

Load sensing static non-reaction and load sensing dynamic non-reaction

Top: Danfoss diagram; bottom: CETOP diagram

8 | © Danfoss | April 2021 BC152886483962en-001003

150-595.11

150-596.10

L R

TLSLS

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPC LS: Steering unit load sensing with integrated valve functions for in line priority valve OLS

OSPC LS (OLS) Load sensing dynamic non-reaction

OSPC LS: Steering unit load sensing with integrated valve functions for flange on priority valve OLSA

OSPC LS (OLSA) Load sensing dynamic non-reaction

Danfoss | April 2021 BC152886483962en-001003 | 9

150-598.11

TLSLS

150-597.11

TLSLS

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPC LSR: Steering unit load sensing dynamic with integrated valve functions

OSPC LSR (OLS) Load sensing dynamic reaction

OSPF LS : Steering unit full drain load sensing dynamic and with integrated valve functions

OSPF LS (OLS) Load sensing dynamic non-reaction

10 | © Danfoss | April 2021 BC152886483962en-001003

L R

150-599.11

P T

L R

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPD LS: Steering unit load sensing dynamic with 2 rotary meters and with integrated valve functions

The OSPD has 2 rotary meters (gear wheel sets). Should the pump supply be lost, only one rotary meter will be active: OSPD displacement will be low for emergency steering (only one rotary meter active) for pressure P-T <3 bar. Displacement will be high for pressure P-T >5 bars: both rotary meters are active.

OSPD LS (OLS)

Load sensing dynamic non-reaction

Danfoss | April 2021 BC152886483962en-001003 | 11

150-301.11

TLSLS

150-601.10

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPL LS:

Steering unit load sensing for high steering flow, displacement larger than 500 cm3/rev [30.5 in3/rev].

OSPL LS (OLS) - Load sensing static non-reaction

OSPL LS (OLS) - Load sensing dynamic non-reaction

12 | © Danfoss | April 2021 BC152886483962en-001003

150-613.10

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPL 1200 (OLS) Load sensing dynamic non-reaction

Danfoss | April 2021 BC152886483962en-001003 | 13

150-310.12

P T LS

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPBX LS, OSPCX LS and OSPLX LS: Steering units load sensing for flow amplifiers

OSPBX LS and OSPLX LS are load sensing steering units with the L and the R connections open to tank when in neutral position. OSPBX LS and OSPLX LS can only be used with Danfoss flow-amplifiers OSQA or OSQB. OSPBX LS and OSPLX LS steering units must not be connected directly to the steering cylinder. OSPCX LS is for OSQ dynamic has per standard included check valve in P and check valve in LS

OSPBX LS, OSPLX LS - Load sensing static

14 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

Code numbers and weights

OSPB load sensing static non-reaction steering units

OSPB LS Static steering units have no valve functions. OSPB LS in the table below have all standard neutral setting springs, see Specification Table for Non

Catalogue Numbers of LS Steering Units

Steering unit Code Numbers Weight

Connections

European version for OLS G 1/2

**)

G 1/4 - S

OSPB 50 LS - 150G6085 5.2 [11.46] OSPB 80 LS - 150G6086 5.3 [11.68] OSPB 100 LS - 150G6087 5.4 [11.90] OSPB 125 LS - 150G6088 5.5 [12.13] OSPB 160 LS - 150G6089 5.6 [12.35] OSPB 200 LS 150-0103 150G6090 5.8 [12.79] OSPB 315 LS 150-0104 150-0116 6.2 [13.67] OSPB 400 LS 150-0105 150-0117 7.0 [15.43]

O-ring chamfer on port connections

**)

Spot face around port connection

US version for OLS 3/4-16 UNF - O 7/16-20 UNF - O*) + S

kg [lb]

**)

Valve blocks OVP and OVR can be mounted on all of the OSPB steering units from the above table.

OSPB load sensing dynamic non-reaction steering units

OSPB LS Dynamic steering units have no valve functions. OSPB LS in the table below have all standard neutral setting springs, see Specification Table for Non

Catalogue Numbers of LS Steering Units

Steering unit Code Numbers Weight

Connections US version for OLS 3/4-16 UNF - O 7/16-20 UNF - O*) + S

OSPB 50 LS 150-8204 5.2 [11.46] OSPB 80 LS 150-8205 5.3 [11.68] OSPB 100 LS 150-8206 5.4 [11.90] OSPB 125 LS 150-8207 5.5 [12.13] OSPB 160 LS 150-8208 5.6 [12.35] OSPB 200 LS 150-8209 5.8 [12.79] OSPB 315 LS 150-8210 6.2 [13.67] OSPB 400 LS 150-8211 7.0 [15.43]

O-ring chamfer on port connections

**)

Spot face around port connection

**)

kg [lb]

Valve blocks OVP and OVR can be mounted on all of the OSPB steering units from the above table

Danfoss | April 2021 BC152886483962en-001003 | 15

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPC load sensing static non-reaction steering unit

OSPC LS Static steering units in the table below incorporate all the following valve functions:

check valve in P-port

•

pilot pressure relief valve

•

shock valves

•

suction valves

•

OSPC LS in the table below have all standard neutral setting springs, see Specification Table for Non

Catalogue Numbers of LS Steering Units

Steering unit Code numbers Valve settings Weight

Connections Relief

European for OLS G 1/2

**)

G 1/4 - S

OSPC 80 LS 150-1230 150-1188 150-1222 170 OSPC 100 LS 150-1231 150-1189 150-1221 5.4 [11.90] OSPC 125 LS 150-1232 150-1190 150-1220 5.5 [12.13] OSPC 160 LS 150-1233 150-1191 150-1219 5.6 [12.35] OSPC 200 LS 150-1234 150-1192 150-1218 5.8 [12.79] OSPC 315 LS 150-1235 - 150G6091 6.2 [13.67] OSPC 400 LS 150-1240 - - 7.0 [15.43]

O-ring chamfer on port connections

**)

Spot face around port connections

European and US version for OLSA

US version for OLS 3/4-16 UNF - O 7/16-20 UNF - O*) + S

Shock

valve

bar [psi]

**)

[2465]

valve bar [psi]

225 [3263]

kg [lb]

5.3 [11.68]

If you require other port connections, valve combinations and/or other valve settings or other displacements, please fill in the order form in the Specification Table for Non Catalogue Numbers of LS

Steering Units and contact the Danfoss Sales Organization.

OSPC load sensing dynamic non-reaction steering units

OSPC LS Dynamic steering units in the table below incorporate all the following valve functions:

check valve in P-port

•

pilot pressure relief valve

•

shock valves

•

suction valves

•

check valve in LS-line for all OSPC LS Dynamic up to and including 200 cm³/rev

•

OSPC LS in the table below have all standard neutral setting springs, see Specification Table for Non

Catalogue Numbers of LS Steering Units

16 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

Steering unit Code numbers Valve settings Weight

Connections Relief

European version for OLS

**)

G 1/2 - S

**)

G 1/4 - S

OSPC 50 LS 150-8233 150-8222 150-8215 140

OSPC 80 LS 150-8234 150-8223 150-8216 170 OSPC 100 LS 150-8235 150-8224 150-8217 5.4 [11.90] OSPC 125 LS 150-8236 150-8225 150-8218 5.5 [12.13] OSPC 160 LS 150-8237 150-8226 150-8219 5.6 [12.35] OSPC 200 LS 150-8238 150-8227 150-8220 5.8 [12.79] OSPC 315 LS 150-8239 - 150-8221 6.2 [13.67] OSPC 400 LS 150-8240 - - 7.0 [15.43]

**)

Spot face around port connections

O-ring chamfer on port connections

European and US version for OLSA

US version for OLS 3/4-16 UNF - O 7/16-20 UNF - O*)+S

Shock valve bar [psi]

**)

[2030]

[2465]

valve

bar [psi]

200

[2900]

225

[3263]

kg [lb]

5.2 [11.46]

5.3 [11.68]

If you require other port connections, valve combinations and/or other valve settings or other displacements please fill in the order form in the Specification Table for Non Catalogue Numbers of LS

Steering Units and contact the Danfoss Sales Organization.

OSPC load sensing dynamic reaction steering units

OSPC LSR Dynamic steering units in the table below incorporate all the following valve functions:

check valve in P-port

•

pilot pressure relief valve

•

shock valves

•

suction valves

•

check valve in LS-line

•

OSPC LSR in the table below have all standard neutral setting springs, see Specification Table for Non

Catalogue Numbers of LS Steering Units

Steering unit Code numbers Valve settings Weight

Connections European version for OLS

**)

G 1/2 - S

**)

G 1/4 - S

OSPC 80 LSR 150-8241 170 [2465] 225 [3263] 5.3 [11.68] OSPC 200 LSR 150-8242 5.8 [12.79]

**)

Spot face around port connections (can not be used in connection with OVR angular block)

Relief valve bar [psi]

Shock valve bar [psi]

kg [lb]

If you require other port connections, valve combinations, valve settings and/or other displacements, please fill in the order form in the Specification Table for Non Catalogue Numbers of LS Steering Units and contact the Danfoss Sales Organization.

OSPF load sensing dynamic non-reaction steering units

OSPF LS Dynamic steering units in the table below incorporate all the following valve functions:

Danfoss | April 2021 BC152886483962en-001003 | 17

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

check valve in P-port

•

pilot pressure relief valve

•

shock valves

•

suction valves

•

OSPF LS in the table below have all soft neutral setting springs, see Specification Table for Non Catalogue

Numbers of LS Steering Units

Steering unit Code numbers Valve settings Weight

Connections European version for OLS

**)

G 1/2 - S

**)

G 1/4 - S

OSPF 80 LS 150G5079 170 [2465] 225 [3263] 5.3 [11.68] OSPF 100 LS 150G5080 5.4 [11.90] OSPF 125 LS 150G5081 5.5 [12.13] OSPF 160 LS 150G5082 5.6 [12.35] OSPF 200 LS 150G5083 5.8 [12.79] OSPF 315 LS 150G5084 6.2 [13.67] OSPF 400 LS 150G5085 7.0 [15.43]

**)

Spot face around port connections (can not be used in connection with OVR angular block)

Relief valve bar [psi]

Shock valve bar [psi]

kg [lb]

OSPD load sensing non-reaction steering units

OSPD LS Dynamic steering units in the table below incorporate all the following valve functions:

check valve in P-port

•

pilot pressure relief valve

•

shock valves

•

suction valves

•

check valve in LS-line

•

OSPD LS in the table below have all standard neutral setting springs, see Specification Table for Non

Catalogue Numbers of LS Steering Units

Steering unit Code numbers Valve settings Weight

Connections European version

**)

G 1/2 - S

**)

G 1/4 - S

OSPD 70/230 LS 11113141 170 [2465] 225 [3263] 7.7 [17.00] OSPD 70/270 LS 11113142 7.9 [17.41] OSPD 70/385 LS 11113143 8.4 [18.52] OSPD 125/325 LS 11113146 8.1 [12.79] OSPD 125/440 LS 11113147 8.6 [18.96]

**)

Spot face around port connections (can not be used in connection with OVR angular block)

Relief valve bar [psi]

Shock valve bar [psi]

kg [lb]

18 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPL load sensing static non-reaction steering units

OSPL LS Static steering units have no valve functions. OSPL LS in the three tables below have all strong neutral setting springs, see Specification Table for Non

Catalogue Numbers of LS Steering Units

Steering unit Code numbers Weight

Connections

European version for OLS G 1/2

**)

G 1/4 - S

OSPL 520 LS 150-7169 150-7167 150-7168 8.1 [17.86] OSPL 630 LS 150-7107 150-7164 150-7113 8.4 [18.52] OSPL 800 LS 150-7108 150-7165 150-7114 8.8 [19.40] OSPL 1000 LS 150-7110 150-7166 150-7115 10.0 [22.05]

**)

Spot face around port connection

O-ring chamfer on port connections

US version for OLS 3/4-16 UNF - O*)* 7/16-20 UNF - O* +

**)

US version for OLS and OVPL LS - port 7/16-20 UNF - O* +

**)

kg [lb]

OSPL load sensing dynamic non-reaction steering units

OSPL LS Dynamic steering units in the table below have no valve functions.

Steering unit Code numbers Weight

Connections US version for OLS 3/4-16 UNF - O 7/16-20 UNF - O*)* +S

OSPL 520 LS 150-8243 8.1 [17.86] OSPL 630 LS 150-8212 8.4 [18.52] OSPL 800 LS 150-8213 8.8 [19.40] OSPL 1000 LS 150-8214 10.0 [22.05]

O-ring chamfer on port connections

**)

Spot face around port connection

**)

kg [lb]

OSPL LS Dynamic steering units in the table below incorporate all the following valve function:

•

pilot pressure relief valve

Steering unit Code numbers Valve settings Weight

Connections European version for OLS and OVPL LS: G 1/4 - S

OSPL 520 LS 150-8244 170 [2465] 8.1 [17.86] OSPL 1000 LS 150-8245 10.0 [22.05]

**)

Spot face around port connection

**)

Relief valve bar [psi]

kg [lb]

If you require other displacements or other valve setting, please fill in the order form in the Specification

Table for Non Catalogue Numbers of LS Steering Units and contact the Danfoss Sales Organization.

OSPL 1200 LS Dynamic steering unit in the table below incorporate all the following valve function:

Danfoss | April 2021 BC152886483962en-001003 | 19

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

•

shock valves

•

suction valves

OSPL 1200 LS in the table below has strong neutral setting springs, see Specification Table for Non

Catalogue Numbers of LS Steering Units

Steering unit

OSPL 1200 LS 150-7175 280 [4061] 11 [24.25]

O-ring chamfer on port connections

**)

Spot face around port connection

Code numbers Valve settings Weight

Connections US version for OLS 3/4 - 16 UNF - O CF: 11/16 - 12 UN 7/16 - 20 UNF - O*)* + S

Shock valves bar [psi]

**)

kg [lb]

If you require other displacements or other valve setting, please fill in the order form in the Specification

Table for Non Catalogue Numbers of LS Steering Units and contact the Danfoss Sales Organization.

OSPBX and OSPLX load sensing static steering units for OSQ static

OSPBX LS and OSPLX LS Static steering units in the table below have no valve functions. OSPBX LS in the table below have all standard neutral setting springs, see Specification Table for Non

Catalogue Numbers of LS Steering Units

OSPLX LS in the table below have all strong neutral setting springs, see Specification Table for Non

Catalogue Numbers of LS Steering Units

Steering unit Code numbers Weight

Connections

European version G 1/2

**)

G 1/4 - S

OSPBX 160 LS 150-1082 150-1078 5.6 [12.35] OSPBX 200 LS 150-1083 150-1079 5.8 [12.79] OSPBX 315 LS 150-1084 150-1080 6.2 [13.67] OSPBX 400 LS 150-1085 150-1081 7.0 [15.43] OSPLX 520 LS 150-7170 150-7173 8.1 [17.86] OSPLX 630 LS 150-7171 150-7174 8.4 [18.52] OSPLX 800 LS 150-7172 150-7155 8.8 [19.40]

**)

Spot face around port connection

O-ring chamfer on port connections

US version 3/4-16 UNF - O 7/16-20 UNF - O*)* + S

kg [lb]

**)

OSPCX load sensing dynamic steering units for OSQ dynamic

OSPCX LS Dynamic steering unit in the table below incorporates the following valve function:

pilot pressure relief valve

•

See Specification Table for Non Catalogue Numbers of LS Steering Units

If you require other displacements or other valve setting, please fill in the order form in the Specification

Table for Non Catalogue Numbers of LS Steering Units and contact the Danfoss Sales Organization.

20 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

Specification table for non catalogue numbers of LS Steering Units

Fill in your company data and place x’s in the table where appropriate, then send to your Danfoss Sales Organization.

Your company

Steering unit type

Reaction type LS ( Non-reaction) LSR (Reaction: only OSPC, OSPD)

Load Sensing type

DP, cm³/rev OSPC LS OSPF LS

DP, cm³/rev OSPC LSR

DP, cm³/rev OSPD LS

DP, cm³/rev OSPD LSR

DP, cm³/rev OSPL, OSPLX

DP, cm³/rev OSPBX LS OSPCX LS

Port threads OSPC, OSPF

Name Vehicle Potential pcs/year Completed by Date

OSPC OSPF OSPD OSPL OSPBX OSPCX OSPLX

Static (Only OSPC, OSPL, OSPBX, OSPCX, OSPLX) Dynamic

40 50 60 70 80 100 125 160 185 200 230 250 315 400

40 50 60 70 80 100 125 160 185 200

60/185 60/220 60/260 70/195 70/230 70/270 70/385 100/200 100/260 100/300 125/285 125/325 125/440

60/185 60/220 70/195 70/230 100/200

520 630 800 1000 1200 (only OSPL)

160 200 250 315 400

G1/2 G1/2- S** M18 × 1.5 - O* + S** 3/4-16 UNF - O* for OLSA (only OSPC)

Port threads OSPD

Port threads OSPL, OSPLX

Relief valve*** bar

Shock valves bar

Suction valves

Check valve in LS

Neutral setting springs

Unit black painted

Danfoss | April 2021 BC152886483962en-001003 | 21

G1/2- S** M18 × 1.5 - O* + S** 3/4-16 UNF - O*

G1/2 3/4-16 UNF - O* For OPVL and without RV (LS = 7/16 - 20

UNF)

70 80 90 100 110 120 140 170 190 200 210 no relief valve

160 180 200 225 240 280 no shock valves

Yes No

Yes (Only for OSPC dynamic and OSPD) No (Only for OSPC, OSPF and OSPL)

Soft:

0.5 - 1.8 Nm in normal steering situations

Yes No

Standard:

0.8 - 3 Nm in normal steering situations

For OVPL and with RV (LS = G 1/4)

Strong:

1.5 - 4 Nm in normal steering situations

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

DP = Displacement, RV = Pilot pressure relief valve. O*: O-ring chamfer on port connections. S**: Spot face around port connections (can not be used in connection with OVR angular block). RV*** see Technical data for limitation in maximum pressure depending on displacements. Types not mentioned with port connections in the table above, are only available in the version(s) stated

in the code number tables. An alternative way to specify a variant is to state an existing code number and add the modifications, you

would like to have implemented in the basic steering unit. Code number of basic steering unit: __________________________________________________ Requested modifications: ___________________________________________________________

Technical data

Common data, refer to General Steering Components Technical Information, BC152886484183.

Displacement, flow and pressure: OSPB LS, OSPC LS, OSPC LSR

OSPB LS, OSPC LS, OSPC LSR

Steering unit Displacement

cm³/rev [in³/rev]

OSPC 40 LS Static 40 [2.44] 4 [1.06] 140 [2030] 40 [580] 280 [4061] OSPB/OSPC 50 LS Static 50 [3.05] 5 [1.32] OSPC 60 LS Static 60 [3.66] 6 [1.58] OSPC 70 LS Static 70 [4.27] 7 [1.85] 175 [2538] OSPB/OSPC 80 LS Static 80 [4.88] 8 [2.11] OSPB/OSPC 100 LS Static 100 [6.10] 10 [2.64] OSPB/OSPC 125 LS Static 125 [7.63] 13 [3.43] 210 [3045] OSPB/OSPC 160 LS Static 160 [9.76] 16 [4.23] OSPC 185 LS Static 185 [11.29] 19 [5.02] OSPB/OSPC 200 LS Static 200 [12.20] 20 [5.28] OSPC 230 LS Static 230 [14.03] 23 [6.07] OSPC 250 LS Static 250 [15.25] 25 [6.60] OSPB/OSPC 315 LS Static 315 [19.22] 32 [8.45] OSPB/OSPC 400 LS Static 400 [24.41] 40 [10.57]

Rated flow at 100 rpm.

Any OSPB/C LS Static can withstand 210 bar in maximum system pressure. However, OSPB/C with small gear wheel

set and high pressure will have relatively high slippage values.

Rated oil

flow l/min [US gal/min]

Max. pressure, bar (psi)

System pressure P-T port pressure

absolute port pressure

L-T/R-T

port

pressure

22 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPB LS, OSPC LS, OSPC LSR

Steering unit Displacement

cm³/rev [in³/rev]

OSPC 40 LS Dynamic 40 [2.44] 4 [1.06] 140 [2030] 40 [580] 280 [4061] OSPB/OSPC 50 LS Dynamic 50 [3.05] 5 [1.32] OSPC 60 LS Dynamic 60 [3.66] 6 [1.58] OSPC 70 LS Dynamic 70 [4.27] 7 [1.85] 175 [2538] OSPB/OSPC 80 LS Dynamic 80 [4.88] 8 [2.11] OSPB/OSPC 100 LS Dynamic 100 [6.10] 10 [2.64] OSPB/OSPC 125 LS Dynamic 125 [7.63] 13 [3.43] 210 [3045] OSPB/OSPC 160 LS Dynamic 160 [9.76] 16 [4.23] OSPC 185 LS Dynamic 185 [11.29] 19 [5.02] OSPB/OSPC 200 LS Dynamic 200 [12.20] 20 [5.28] OSPC 230 LS Dynamic 230 [14.03] 23 [6.07] OSPC 250 LS Dynamic 250 [15.25] 25 [6.60] OSPB/OSPC 315 LS Dynamic 315 [19.22] 32 [8.45] OSPB/OSPC 400 LS Dynamic 400 [24.41] 40 [10.57] OSPC 40 LSR Dynamic 40 [2.44] 4 [1.06] 140 [2030] 40 [580] 280 [4061] OSPC 50 LSR Dynamic 50 [3.05] 5 [1.32] OSPC 60 LSR Dynamic 60 [3.66] 6 [1.58] OSPC 70 LSR Dynamic 70 [4.27] 7 [1.85] 175 [2538] OSPC 80 LSR Dynamic 80 [4.88] 8 [2.11] SPC 100 LSR Dynamic 100 [6.10] 10 [2.64] OSPC 125 LSR Dynamic 125 [7.63] 13 [3.43] 210 [3045] OSPC 160 LSR Dynamic 160 [9.76] 16 [4.23] OSPC 185 LSR Dynamic 185 [11.29] 19 [5.02] OSPC 200 LSR Dynamic 200 [12.20] 20 [5.28]

Rated flow at 100 rpm.

Any OSPB/C LS Dynamic can withstand 210 bar in maximum system pressure. However, OSPB/C with small gear

wheel set and high pressure will have relatively high slippage values.

Rated oil

flow l/min [US gal/min]

Max. pressure, bar (psi)

System pressure P-T port pressure

absolute port pressure

L-T/R-T port pressure

Danfoss | April 2021 BC152886483962en-001003 | 23

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

Displacement, flow and pressure: OSPF LS

Steering unit Displacement

OSPF 50 LS Dynamic 50 [3.05] 5 [1.32] 140 [2030] 40 [580] 280 [4061] OSPF 60 LS Dynamic 60 [3.66] 6 [1.58] OSPF 70 LS Dynamic 70 [4.27] 7 [1.85] 175 [2538] OSPF 80 LS Dynamic 80 [4.88] 8 [2.11] OSPF 100 LS Dynamic 100 [6.10] 10 [2.64] OSPF 125 LS Dynamic 125 [7.63] 13 [3.43] 210 [3045] OSPF 160 LS Dynamic 160 [9.76] 16 [4.23] OSPF 185 LS Dynamic 185 [11.29] 19 [5.02] OSPF 200 LS Dynamic 200 [12.20] 20 [5.28] OSPF 230 LS Dynamic 230 [14.03] 23 [6.07] OSPF 250 LS Dynamic 250 [15.25] 25 [6.60] OSPF 315 LS Dynamic 315 [19.22] 32 [8.45] OSPF 400 LS Dynamic 400 [24.41] 40 [10.57]

Rated flow at 100 rpm.

Any OSPB/C/F LS Dynamic can withstand 210 bar in max. system pressure. However OSPB/C/F w. small gear wheel

cm³/rev [in³/ rev]

Rated oil

flow l/min [US gal/ min]

Max. pressure, bar (psi)

System pressure P-T port

pressure

T, absolute port pressure

L-T/R-T port

pressure

set and high pressure will have relatively high slippage values.

Displacement, flow and pressure: OSPD LS

OSPD steering units in the table below are all Load Sensing Dynamic type.

Steering unit Displacement

manual steer mode cm³/rev [in³/rev]

OSPD 60/185 LS 60 [3.66] 185 [11.29] 19 [5.02] 210 [3045] 40 [580] 280 [4061] OSPD 60/220 LS 60 [3.66] 220 [13.42] 22 [5.81] OSPD 60/260 LS 60 [3.66] 260 [15.87] 26 [6.87] OSPD 70/195 LS 70 [4.27] 195 [11.90] 20 [5.28] OSPD 70/230 LS 70 [4.27] 230 [14.03] 23 [6.07] OSPD 70/270 LS 70 [4.27] 270 [16.48] 27 [7.13] OSPD 70/385 LS 70 [4.27] 385 [23.49] 39 [10.30] OSPD 100/200 LS 100 [6.10] 200 [12.20] 20 [5.28] OSPD 100/260 LS 100 [6.10] 260 [15.87] 26 [6.87] OSPD 100/300 LS 100 [6.10] 300 [18.31] 30 [7.93] OSPD 125/285 LS 125 [7.63] 285 [17.39] 29 [7.66] OSPD 125/325 LS 125 [7.63] 325 [19.83] 33 [8.72] OSPD 125/440 LS 125 [7.63] 440 [26.85] 44 [11.62]

Displacement normal steer mode cm³/rev [in³/rev]

Rated oil

flow l/min [US gal/min]

Max. pressure, bar (psi)

System Pressure P-T port pressure

T, absolute port pressure

L-T/R-T port pressure

24 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

Steering unit Displacement

manual steer mode cm³/rev [in³/rev]

Displacement normal steer mode cm³/rev [in³/rev]

Rated oil

flow l/min [US gal/min]

Max. pressure, bar (psi)

System Pressure P-T port pressure

T, absolute port pressure

L-T/R-T port pressure

OSPD 60/185 LSR 60 [3.66] 185 [11.29] 19 [5.02] 210 [3045] 40 [580] 280 [4061] OSPD 60/220 LSR 60 [3.66] 220 [13.42] 22 [5.81] OSPD 70/195 LSR 70 [4.27] 195 [11.90] 20 [5.28] OSPD 100/200 LSR 100 [6.10] 200 [12.20] 20 [5.28]

Rated flow at 100 rpm.

Displacement, flow and pressure: OSPL LS, OSPBX LS, OSPCX LS, OSPLX LS

Steering unit Displacement

cm³/rev [in³/rev]

OSPL 520 LS Static 520 [31.73] 52 [13.74] 240 [3480] 40 [580] 280 [4061] OSPL 630 LS Static 630 [38.44] 63 [16.64] OSPL 800 LS Static 800 [48.82] 80 [21.10] OSPL 1000 LS Static 1000 [61.02] 100 [26.40] OSPL 520 LS Dynamic 520 [31.73] 52 [13.74] 240 [3080] 40 [580] 280 [4061] OSPL 630 LS Dynamic 630 [38.44] 63 [16.64] OSPL 800 LS Dynamic 800 [48.82] 80 [21.10] OSPL 1000 LS Dynamic 1000 [61.02] 100 [26.40] OSPL 1200** Dynamic 1200 [73.22] 100 [26.40] OSPBX 160 LS Static 160 [9.76] 16 [4.23] 210 [3045] 40 [580] 280 [4061] OSPBX 200 LS Static 200 [12.20] 20 [5.28] OSPBX 250 LS Static 250 [15.25] 25 [6.60] OSPBX 315 LS Static 315 [19.22] 32 [8.45] OSPBX 400 LS Static 400 [24.41] 40 [10.57] OSPCX 160 LS Dynamic 160 [9.76] 16 [4.23] 210 [3045] 40 [580] 280 [4061] OSPCX 200 LS Dynamic 200 [12.20] 20 [5.28] OSPCX 250 LS Dynamic 250 [15.25] 25 [6.60] OSPCX 315 LS Dynamic 315 [19.22] 32 [8.45] OSPCX 400 LS Dynamic 400 [24.41] 40 [10.57] OSPLX 520 LS Static 520 [31.73] 52 [13.74] 240 [3480] 40 [580] 280 [4061] OSPLX 630 LS Static 630 [38.44] 63 [16.64] OSPLX 800 LS Static 800 [48.82] 80 [21.10]

Rated flow at 100 rpm.

OSPL 1200 max speed at 100l/min [26.4 US gal/min] 83 rpm.

Rated oil

flow l/min [US gal/min]

Max. pressure, bar (psi)

System pressure P-T port pressure

T, absolute port pressure

L-R port pressure

Danfoss | April 2021 BC152886483962en-001003 | 25

3000

2500

2000

1500

1000

200

180

160

140

120

100

psi bar

152B79.10

0 10 20 30 40 50 60 70 80 l/min

P-T P-T

0 2 4 6 8 10 12 14 16 18 20 US gal/min

OSPC/OSPF/OSPD/OSPU/OSPL LS+OLS 80

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

Valve functions in OSPC, OSPF, OSPD and OSPL LS steering units

Pilot pressure relief valve; (P - T, Qp) characteristic

The pilot pressure relief valve protects the steering unit against excessive pressure. The pilot pressure relief valve in the OSPC LS, OSPF LS, OSPD LS and OSPL LS steering unit together with the priority valve limit the maximum steering pressure P-T. The pilot pressure relief valve is set at an oil flow to the priority valve of 25 l/min [6.60 US gal/min].

For OSPC, OSPD and OSPL load sensing dynamic steering units, the setting values are valid at a dynamic flow of 0.6 l/min [0.16 US gal/min].

For OSPF load sensing dynamic steering units, the setting values are valid at a dynamic flow of 1.1 l/min [0.29 US gal/min].

Setting tolerance: </= 170 bar [2465 psi]: rated value +5 bar [72.5 psi]. > 170 bar [2465 psi]: rated value +10 bar [145 psi].

A = 170 + 5 bar [2465+ 73 psi] B = 140 + 5 bar [2030 + 73 psi]

Shock valves

The shock valves protect the steering unit and reduce external forces on the steering cylinder by limiting the pressure difference from L to T and from R to T.

The shock valves are set at 3 l/min [0.792 US gal/min] At higher flow pressure peaks may occur.

26 | © Danfoss | April 2021 BC152886483962en-001003

The shock valves are of the direct acting type, so they react very quickly. Setting tolerance: rated value +20 bar [290 psi].

Suction valves

The suction valves allow oil suction to avoid cavitation in the steering cylinder. To provide correct suction, a back pressure valve must be fitted in the tank line from the steering unit.

Generally Danfoss recommend a back pressure of 2 bar [29 psi], but on vehicles with strong self straightening tendencies and on articulated steered vehicles, we recommend 5-10 bar [72.5 - 145 psi]. For further advice, please contact the Danfoss Sales Organization.

100

psi bar

150-374.10

0 1 2 3 4 5 6 7 8 9 10 11 l/min

T-R T-L

0 0.25 0.50 0.75 1 1.25 1.50 1.75 2 2.25 2.50 2.75 US gal/min

psi bar

150-375.11

0 10 20 30 40 50 60 70 80 l/min

0 3 6 9 12 15 18 21 US gal/min

∆ p ∆ p

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

A connection which incorporates a check valve must be established to allow oil flow to by-pass the back pressure valve (and filter) from the tank to steering unit. See diagram examples in sub catalogue “General Steering Components” page 37 - 39.

Check valves

The check valve in the P connection of the steering unit protects the driver against steering wheel jerks. The check valve prevents oil from flowing backwards into the pump line when steering against a high pressure on the cylinder side. The pressure drop across the check valve is indicated on the following graph, which assumes the use of port adapters with 11 mm [0.43 in] minimum bore.

Danfoss | April 2021 BC152886483962en-001003 | 27

The check valve in the LS line of OSPC LS and OSPD LS dynamic steering units also protects the driver against steering wheel jerks. The check valve prevents oil from flowing backwards into the LS line to the priority valve when steering against a high pressure on the cylinder side.

In OSPF LS oil cannot flow backwards into the LS line, look in sub catalogue: “General Steering Components “ page 26.

min.Ø21[0.83]

min.12[0.479]

30°

1[0.04]

150-603.10-A

min.12[0.47]

min.Ø28[1.10]

30°

150-603.10-B

150-603.10-C

min.15[0.59]

Ø21.5[0.846]

150-603.10-D

0.6[0.024]

Ø28.3[1.114]

Ø28.6[1.126]

min.15[0.59]

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

Port thread versions for OSPB LS, OSPC LS/LSR, OSPF LS, OSPD LS/LSR, OSPL LS, OSPBX LS, OSPCX LS, OSPLX LS

A: G port w. spot face (LS in OSPB and OSPL with no

valves)

K: DIN 3852-2 - G 1/4

B: G port w. spot face (LS in OSPC/F/D/Q and OSPL with

valves)

L: DIN 3852-2 - G 1/4

C: G ports (P, T, L, R) M: DIN 3852-2 - G 1/2

D: G ports w. spot face (P, T, L, R) N: DIN 3852-2 - G 1/2

28 | © Danfoss | April 2021 BC152886483962en-001003

150-603.10-E

1[0.04]

min.11.5[0.453]

min.Ø22[0.87]

min.Ø26[1.02]

30°

150-603.10-F

0.6[0.024]

Ø28.6[1.126] Ø28.3[1.114]

min.15[0.59]

150-603.10-G

30°

min.Ø21[0.83]

min.11.5[0.45]

150-603.10-H

min.11.5[0.45]

min.Ø21[0.83]

30°

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

E: Metric port w. spot face and O-ring chamfer (LS) O: ISO 6149-1 - M12 x 1.5

F: Metric ports w. spot face and O-ring chamfer (P, T, L, R) P: ISO 6149-1 - M18 x 1.5

G: UNF port w. O-ring chamfer (LS in OSPB and OSPL with

no valves)

Q: ISO 11926-1 - 7/16-20UNF O-ring boss port

H: UNF ports w. O-ring chamfer (LS in OSPC/ F/D and

OSPL with valves) R: ISO 11926-1 - 7/16-20 UNF O-ring boss port

Danfoss | April 2021 BC152886483962en-001003 | 29

150-603.10-I

min.15[0.59]

Ø20.8[0.819]

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

I: UNF ports w. O-ring chamfer (P, T, L, R) S: ISO 11926-1 - 3/4-16UNF O-ring boss port

30 | © Danfoss | April 2021 BC152886483962en-001003

150-590.11

66 [2.60]

Ø44.4 [1.748]

Ø25.4 [1.000]

44 [1.73]

47 [1.85]

max. 87 [3.42]

Ø91 [3.58]

64 [2.52]

2.8 [0.110]

min. 7.1 [0.280]

7 [0.28]

45˚

Ø82.3 [3.240]

Ø81.7 [3.217]

57 [2.24]

85 [3.35]

102 [4.02]

44 [1.73]

29 [1.14]

T P

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

Dimensions

OSPB LS for OLS, OSPBX LS for OSQ

Dimensions for OSPB LS for OLS, OSPBX LS for OSQ

Type L1mm

[in]

OSPB 50 126 [4.96] 6.5 [0.26] OSPB 80 129 [5.08] 10.4 [0.41] OSPB 100 132 [5.20] 13.0 [0.51] OSPB 125 135 [5.31] 16.2 [0.64] OSPB/OSPBX 160 140 [5.51] 20.8 [0.82] OSPB/OSPBX 200 145 [5.71] 26.0 [1.02] OSPB/OSPBX 250 151 [5.94] 32.5 [1.28] OSPB/OSPBX 315 160 [6.30] 40.9 [1.61] OSPB/OSPBX 400 171 [6.73] 52.0 [2.05]

L2mm [in]

Dimensions for OSPB LS for OLS, OSPBX LS for OSQ

Danfoss | April 2021 BC152886483962en-001003 | 31

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

European version: US version:

A: G 1/2; 15 mm [0.59 in] deep A: 3/4 - 16 UNF O-ring boss; 15 mm [0.59 in] deep B: M10 × 1.5, 16 mm [0.63 in] deep B: 3/8 - 16 UNC, 16 mm [0.63 in] deep LS: G ¼ with spot face, 11 mm [0.43 in] deep LS: G 7/16 - 20 UNF O-ring boss, 11.5 mm [0.45 in] deep

32 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPC LS/LSR and OSPF LS for OLS, OSPCX LS for OSQ

Type L

OSPC 40 126 [4.96] 6.5 [0.26] OSPC/OSPF 50 126 [4.96] 6.5[0.26] OSPC/OSPF 60 128 [5.04] 9.1 [0.36] OSPC/OSPF 70 128 [5.04] 9.1 [0.36] OSPC/OSPF 80 129 [5.08] 10.4 [0.41] OSPC/OSPF 100 132 [5.20] 13.0 [0.51] OSPC/OSPF 125 135 [5.31] 16.2 [0.64] OSPC/OSPF OSPCX 160 140 [5.51] 20.8 [0.82] OSPC/OSPF 185 143 [5.63] 24.0 [0.94] OSPC/OSPF OSPCX 200 145 [5.71] 26.0 [1.02] OSPC/OSPF 230 149 [5.87] 29.9 [1.18] OSPC/OSPF OSPCX 250 151 [5.94] 32.5 [1.28] OSPC/OSPF OSPCX 315 160 [6.30] 40.9 [1.61] OSPC/OSPF/OSPCX 400 171 [6.73] 52.0 [2.05]

mm [in]

Danfoss | April 2021 BC152886483962en-001003 | 33

150-591.11

35 [1.38]

Ø44.4 [1.748]

Ø25.4 [1.000]

44 [1.73]

51 [2.01]

2.8 [0.110]

min. 7.1 [0.280]

7 [0.28]

44 [1.73]

29 [1.14]

L T P

38 [1.50]

47 [1.85]

max. 87 [3.42]

Ø91 [3.58]

45˚

Ø82.3 [3.240]

Ø81.7 [3.217]

57 [2.24]

85 [3.35]

102 [4.02]

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

European version: US version:

A: G 1/2 or G 1/2 w. spot face or M18 x 1.5 ISO 6149,

A: 3/4-16 UNF O-ring boss, 15 mm (0.59 in) deep

15 mm [0.59 in] deep B: M10 x 1.5, 16 mm [0.63 in] deep B: 3/8 - 16 UNC or M10 x 1.5, 16 mm [0.63 in] deep LS: G 1/4 w. spot face

or M12 x 1.5 ISO 6149,

LS: 7/16 - 20 UNF O-ring boss,

11.5 mm [0.45 in] deep

34 | © Danfoss | April 2021 BC152886483962en-001003

150-593.12

35 [1.38]

Ø44.4 [1.748]

Ø25.4 [1.000]

38 [1.50]

44 [1.73]

47 [1.85]

max. 87 [3.42]

Ø91 [3.58]

51 [2.01]

2.8 [0.110]

min. 7.1 [0.280]

7 [0.28]

45˚

Ø82.3 [3.240]

Ø81.7 [3.217]

57 [2.24]

85 [3.35]

102 [4.02]

44 [1.73]

29 [1.14]

L T P

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPD LS/LSR for OLS

Type L

mm [in]

OSPD 60/185 191 [7.52] 9.1 [0.36] 16.2 [0.64] OSPD 60/220 195 [7.68] 9.1 [0.36] 20.8 [0.82] OSPD 70/195 190 [7.48] 9.1 [0.36] 16.2 [0.65] OSPD 70/230 195 [7.70] 9.1 [0.36] 20.8 [0.82] OSPD 70/270 200 [7.87] 9.1 [0.36] 26.0 [1.02] OSPD 70/385 215 [8.46] 9.1 [0.36] 40.9 [1.61] OSPD 100/200 191 [7.52] 13.0 [0.51] 13.0 [0.51] OSPD 100/260 199 [7.83] 13.0 [0.51] 20.8 [0.82] OSPD 100/300 204 [8.03] 13.0 [0.51] 26.0 [1.02] OSPD 125/285 202 [7.95] 16.2 [0.64] 20.8 [0.82] OSPD 125/325 207 [8.15] 16.2 [0.64] 26.0 [1.02] OSPD 125/440 222 [8.74] 16.2 [0.64] 40.9 [1.61]

A: 3/4 - 16 UNF O-ring boss; 15 mm [0.59 in] deep

European version: US version:

A: G 1/2 w. spot-face or M18 × 1.5 ISO 6149 15 mm [0.59 in] deep

B: M10 × 1.5, 16 mm [0.63 in] deep B: M 10 × 1.5, 16 mm [0.63 in] deep, LS: G ¼ w. spot face or M 12 x 1.5 ISO 6149

Danfoss | April 2021 BC152886483962en-001003 | 35

11.5 mm [0.45 in] deep

LS: 7/16 - 20 UNF o-ring boss, 11.5 mm [0.45 in] deep

P301 030

35 [1.38]

Ø44.4 [1.748]

Ø25.4 [1.000]

44 [1.73]

47 [1.85]

max. 87 [3.42]

Ø91 [3.58]

51 [2.01]

38 [1.50]

66 [2.60]

64 [2.52]

2.8 [0.110]

min. 7.1 [0.280]

7 [0.28]

45˚

Ø82.3 [3.240]

Ø81.7 [3.217]

57 [2.24]

85 [3.35]

102 [4.02]

44 [1.73]

29 [1.14]

L T P

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPL LS for OLS and OSPLX LS for OSQ

Type L

mm [in]

OSPL/OSPLX 520 197 [7.76] 67.8 [2.67] OSPL/OSPLX 630 211 [8.31] 82.0 [3.23] OSPL/OSPLX 800 233 [9.17] 104.0 [4.09] OSPL 1000 263 [10.35] 134.0 [5.27]

OSPL LS with pilot pressure relief valve:

European version: US version:

36 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

A: G 1/2; 15 mm [0.59 in] deep A: 3/4-16 UNF O-ring boss, 15 mm [0.59 in] deep or for

B: M10 x 1.5, 16 mm [0.63 in] deep B: M10 x 1.5, 16 mm [0.63 in] deep LS: G 1/4 w. spot face, 11.5 mm [0.45 in] deep LS: 7/16-20 UNF O-ring boss, 11.5 mm [0.45 in] deep

European version:

A: for OVPL B: M10 x 1.5, 16 mm [0.63 in] deep LS: G 1/4 w. spot face, 11.5 mm [0.45 in] deep

OVPL

Danfoss | April 2021 BC152886483962en-001003 | 37

150-612.10

35 [1.38]

Ø44.4 [1.748]

Ø44.35 [1.746]

Ø25.4 [1.000]

38 [1.50]

44 [1.73]

47 [1.85]

max. 87 [3.42]

Ø91 [3.58]

51 [2.01]

2.8 [0.110]

min. 7.1 [0.280]

7 [0.28]

45˚

Ø82.3 [3.240]

Ø81.7 [3.217]

57 [2.24]

85 [3.35]

102 [4.02]

44 [1.73]

29 [1.14]

L T P

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

OSPL 1200 LS for OLS

Type L

mm [in]

OSPL 1200 LS 288 [10.34] 104 [4.09] 52 [2.05]

A: 3/4 - 16 UNF O-ring boss, 15 mm [0.59 in] deep B: M10 x 1.5, 16 mm [0.63 in] deep LS: 7/16 - 20 UNF O-ring boss 11.5 mm [0.45 in] deepOSPL

1200 LS for OLS

38 | © Danfoss | April 2021 BC152886483962en-001003

150-685.10

Cylinders

OVPL, 7 ports

OSPL LS

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Valve Block OVPL

OVPL valve blocks can be flanged onto Danfoss steering units type OSPL, which are prepared for OVPL mounting.

Versions

OVPL valve blocks contain shock valves, suction valves, check valve and back-pressure valve. OVPL valve blocks are available with 4, 5 or 7 connections. OVPL with 7 connections have 2 L and 2 R connections, which means that 2 steering cylinders can be connected directly to the valve block.

OVPL, 7 ports

Danfoss | April 2021 BC152886483962en-001003 | 39

External connection

Sauer-Danfoss steering unit

150-628.10

L L

R R

T T

External connection

Sauer-Danfoss steering unit

150-629.10

R R

T T

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Valve Block OVPL

Code numbers and weight

OVPL in the table below have all the following valve functions incorporated:

•

Check valve in P-port

•

Shock valves

•

Suction valves

OVPL, 5 ports

OVPL, 7 ports

Valve block Code numbers Valve settings Weight

Connections European version P, T, L, R: G 1/2-S PP: G 1/4-S

OVPL 24 152-1117 5 240 [3480] 2.0 [4.41] OVPL 28 152-1114 5 280 [4061] 2.0 [4.41] OVPL 28 152-1116 7 280 [4061] 2.0 [4.41]

Spot face around port connections

Number of ports Shock valve

bar [psi]

OVPL in the table below has the following valve functions incorporated:

•

Check valve in P-port

•

Shock valves

•

40 | © Danfoss | April 2021 BC152886483962en-001003

Suction valves

•

Backpressure valve, with by-pass to reduce stand-by pressure in neutral position.

kg [lb]

External connection

Sauer-Danfoss steering unit

150-630.10

L L

R R

T T

External connection

Danfoss steering unit

150-631.10

L L

R R

T T

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Valve Block OVPL

OVPL, 5 ports and backpressure valve with by-pass

Valve block Code numbers Valve settings Weight

Connections European version P, T, L, R: G 1/2-S PP: G 1/4-S

OVPL 24 152-1120 5 240 [3480] 2.0 [4.41] OVPL 28 152-1130 5 280 [4061] 2.0 [4.41]

Spot face around port connections

Number of ports Shock valve

bar [psi]

kg [lb]

OVPL in the table below have all the following valve functions incorporated:

•

Check valve in P-port

•

Shock valves

•

Suction valves

•

Backpressure valve, without by-pass.

OVPL, 5 ports and backpressure valve

Danfoss | April 2021 BC152886483962en-001003 | 41

External connection

Danfoss steering unit

150-632.10

R R

T T

External connection

Danfoss steering unit

150-633.10

L L

P P

R R

T T

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Valve Block OVPL

OVPL, 7 ports and backpressure valve

Valve block Code numbers Valve settings Weight

Connections European version P, T, L, R: G 1/2 - S PP: G 1/4 - S

OVPL 24 152-1132 5 240 [3480] 2.0 [4.41] OVPL 28 152-1115 7 280 [4061] 2.0 [4.41]

Spot face around port connections

Number of ports Shock valve

bar [psi]

kg [lb]

OVPL in the table below has following valve functions incorporated:

•

Check valve in P-port

•

Shock valves

•

Suction valves

OVPL, 4 ports

42 | © Danfoss | April 2021 BC152886483962en-001003

Valve block Code numbers Valve settings Weight

Connections US version 3/4 - 16 UNF

O* + S

Number of ports Shock valve

bar [psi]

kg [lb]

OVPL 28 152-1133 4 280 [4061] 2.0 [4.41]

O-ring chamfer on port connections

External connection

Danfoss steering unit

150-634.10

L L

P P

R R

T T

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Valve Block OVPL

Valve block Code numbers Valve settings Weight

Connections US version 3/4 - 16 UNF

O* + S

Spot face around port connections

OVPL in the table below has the following valve functions incorporated:

•

Check valve in P-port

•

Shock valves

•

Suction valves

•

Backpressure valve with by-pass to reduce stand-by pressure in neutral position.

OVPL, 4 ports and backpressure valve with by-pass

Number of ports Shock valve

bar [psi]

kg [lb]

Technical data

Valve functions

Danfoss | April 2021 BC152886483962en-001003 | 43

Valve block Code numbers Valve

Connections US version 3/4 - 16 UNF

O* + S

OVPL 28 152-1136 4 280

O-ring chamfer on port connections

Spot face around port connections

Number of ports Shoc

Weight setti ngs

kg [lb] k valve bar [psi]

2.0 [4.41] [4061 ]

Common data

Common data, refer to General Steering Components Technical Information, BC152886484183.

The data below come from measurements on a representative sample of valve blocks from production. An oil with a viscosity of 21 mm²/s [SUS] at 50°C [122°F] was used during measuring.

200

150

100

psi bar

152-150.10

0 10 20 30 40 50 60 l/min

∆ p ∆ p

0 2 4 6 8 10 12 14 16 US gal/min

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Valve Block OVPL

Valve block Max. Oil flow

l/min [US gal/min]

Max. pressure on connections

P, PP bar [psi]

T bar [psi]

L, R bar [psi]

OVPL 24 100 [26.42] 190 [2756] 15 [218] 240 [3480] OVPL 28 100 [26.42] 225 [3263] 15 [218] 280 [4061]

Shock valves

The shock valves protect the valve block and steering unit and limit maximum external forces on the steering cylinder. The shock valves in the valve block limit the maximum pressure drop from L to T and from R to T.

The shock valves are set at 10 l/min. [2.64 US gal/min]. The shock valves are of the direct acting type, so they react very quickly. Setting tolerance: rated value +/- 10 bar [145 psi] , ex. 240 [3480 psi] +/- 10 bar [145 psi].

Suction valves

The suction valves ensure oil suction to avoid cavitations in the steering cylinder. To provide correct suction, a back pressure valve must be fitted in the tank line from the steering unit.

The capacity of the suction valves can be increased by building in a back pressure in the valve block. The curve below shows pressure drop across a suction valve

Check valve

44 | © Danfoss | April 2021 BC152886483962en-001003

The check valve protects the driver against steering wheel jerks. The check valve prevents oil from flowing backwards into the pump line when steering against a high pressure on the cylinder side.

The check valve is built into the P connection of the valve block. The curve below shows pressure drop across the check valve in p-connection

psi bar

152-152.10

0 10 20 30 40 50 60 70 80 90 100 110 l/min

∆ p ∆ p

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 US gal/min

300

250

200

150

100

psi bar

152-151.10

0 10 20 30 40 50 60 70 80 90 100 l/min

∆ p ∆ p

0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 US gal/min

300

250

200

150

100

psi bar

152-178.10

0 10 20 30 40 50 60 70 80 90 100 l/min

∆ p ∆ p

0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 US gal/min

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Valve Block OVPL

Backpressure valve

A backpressure valve increases the capacity of the suction valves. The curve below shows pressure drop for backpressure valve without by-pass.

The curve below shows pressure drop for backpressure valve with by-pass.

Danfoss | April 2021 BC152886483962en-001003 | 45

152-149.10

92 [3.62]

44 [1.73]

29 [1.14]

102 [4.02]

28 [1.10]

16 [0.63]

51 [2.01]

95 [3.74]

44 [1.73]

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Valve Block OVPL

Installation

Connection P in the valve block must be placed over the connection P in the steering unit, so OVPL is provided with a positioning pin to fit the positioning hole in the steering unit.

The valve block is supplied inclusive of 2 mounting screws and 4 O-rings for building onto the steering unit.

Tightening torque 65 ±5 N•m [575 ±44 lbf•in]. It is only allowed to mount OVPL blocks on steering units with a flat port flange, no spot face is allowed.

Dimensions

OVPL, 5 ports

European version:

P, T, L and R: G 1/2 w. spot face, 15 mm [0.59 in] deep PP: G 1/4, w. spot face, 11,5 mm [0.45 in] deep X: 30,2 +0,2 Y: 21,3 +/- 0,2 OVPL, 4 ports (no PP)

US version:

P, T, L and R: 3/4-16 UNF O-ring boss 15 mm [0.59 in] deep X: 30.2 +0.2 B: Positioning pin premounted in OVPL

46 | © Danfoss | April 2021 BC152886483962en-001003

152-148.10

29 [1.14]

92 [3.62]

28 [1.10]

50 [1.97]

102 [4.02]

92 [3.62]

51 [2.01]

16 [0.63]

21.5 [0.85]

44 [1.73]

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Valve Block OVPL

OVPL, 7 ports

European version:

P, T, 2xL and 2xR: G 1/2 w. spot face, 15 mm [0.59 in] deep PP: G 1/4, w. spot face,

11.5 mm [0.45 in] deep X: 30.2 +0.2 Y: 21.3 +/- 0.2 B: Positioning pin premounted in OVPL

Danfoss | April 2021 BC152886483962en-001003 | 47

150-635.10

L L

P P

R R

T T

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Angle Block OVR

OVR angle blocks are especially designed for applications in which pipes and/or hoses must run parallel with the steering column axis, and where space is limited.

The valve block can be flanged onto Danfoss steering unit OSPB, OSPC, OSPD, OSPF, OSPQ and OSPL, which have no spot face around the ports.

Use the angle block makes angle and swivel connections and pipe bends unnecessary. The OVR connections are positioned away from the steering wheel. (see Dimensions on page 49)

Version

OVR

Code numbers and weight

Installation

OVR in the table below has no valve functions incorporated.

Angle block Code numbers Weight

Connections European version P, T, L, R: G 1/2 S**

OVR 152-0201 2.0 [4.41]

kg [lb]

S** : Spot face around port connections

The valve block is supplied inclusive of 2 mounting screws and 4 O-rings for building onto the steering unit.

Tightening torque 65 ±5 N•m [575 ±44.3 lbf•in]. OVR blocks may only be mounted on steering units with a flat port flange, (no spot facing).

For OVR blocks with other thread ore kind of valves mounted, please contact the Danfoss Sales organization.

48 | © Danfoss | April 2021 BC152886483962en-001003

91 [3.58]

2.5 [0.098] max.

140 [5.51]

Ø29.4 [1.158]

Ø29.0 [1.143]

38 [1.50]

106 [4.17]

15 [0.59]

max. 0.5 [0.20]

100 [3.94]

152-31.10

46 [1.81]

25 [0.98]

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Angle Block OVR

Dimensions

OVR

European version: P, T, L and R:

G 1/2, 15 mm [0.59 in] deep

Danfoss | April 2021 BC152886483962en-001003 | 49

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

Versions

Danfoss priority valves are used in steering systems with load sensing steering units. In such systems steering always has first priority

Load sensing static priority valves

Load sensing static steering units require load sensing static priority valves. Load sensing static steering systems have no oil flow in the LS connection when the steering unit is in neutral position.

Load sensing dynamic priority valves

Load sensing dynamic steering units require load sensing dynamic priority valves. Load sensing dynamic steering systems have a constant oil flow in the LS connection from the priority valve to the steering unit even when the steering unit is in neutral position.

Ports: P = pump, CF = controlled flow (priority oil flow), EF = excess flow, L = left, R = right, T = tank, LS = load sensing, PP = pilot pressure

50 | © Danfoss | April 2021 BC152886483962en-001003

152B135.11

CF T R RLL

T EFP

152B170.11

CF T R RLL

EFP

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLSA 40/80

The OLSA 40 and OLSA 80 “flange on” priority valves are used in load sensing steering systems, built onto OSPC LS (OLSA) steering units.

OLSA static

OLSA dynamic

A: PP-damping orifice B: LS-orifice C: Dynamic-orifice

Danfoss | April 2021 BC152886483962en-001003 | 51

152B134.10

CF EF

152B171.10

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 40/80 and OLS 120

The OLS 40, OLS 80, and OLS 120 “in line” priority valves are used in load sensing steering systems together with OSPB LS, OSPC LS, OSPF LS, OSPD LS, OSPU LS and OSPL LS steering units.

OLS 40/80 OLS 120

OLS static

OLS dynamic

52 | © Danfoss | April 2021 BC152886483962en-001003

152B137.11

CF EF LS

152B172.11

CF EF LS

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 160

The OLS 160 “in line” priority valve is used in load sensing steering systems together with OSPB LS, OSPC LS, OSPF LS, OSPD LS, OSPU LS and OSPL LS steering units.

OLS 160

OLS static

OLS dynamic

OLS 160 is also available without pilot pressure relief valve.

Danfoss | April 2021 BC152886483962en-001003 | 53

152B134.10

CF EF

152B171.10

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLSP 80

The priority valve OLSP 80 is to be used in connection with e.g. Danfoss gear pumps type SNP and steering units type OSPB LS, OSPC LS, OSPF LS, OSPD LS and OSPU LS in load sensing steering systems, where maximum oil flow does not exceed 80 l/min [21.7 US gal/min].

OLSP 80 priority valves are to be flanged on gear pumps with outlet ports square flange type 35 (35 mm pitch diameter of 4x M6 bolt holes for fixing the priority valve on pump).

OLSP

OLS 80 static

OLS 80 dynamic

54 | © Danfoss | April 2021 BC152886483962en-001003

152B172.11

CF EF LS

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 320

The OLS 320 “in line” priority valve is used together with OSPB LS, OSPC LS, OSPF LS, OSPD LS, OSPU LS and OSPL LS in load sensing steering systems with pump flow up to 320 l/min [84.5 USgal/min].

OLS 320 static OLS 320 dynamic

Danfoss | April 2021 BC152886483962en-001003 | 55

P301 025

OLS 320

CL CR

EHPS

type 0

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 320 without pilot pressure relief valve

OLS 320 is also available without pilot pressure relief valve. EHPS steering valve has build in priority valve, but for max. pump flow 120 l/min [31.7 USgal/min] In

systems with EHPS and pump flow between 120 l/min [31.7 USgal/min] and 320 l/min [84.5 USgal/min] a combination of EHPS and OLS 320 gives a good compact solution to reduce hosing and installation cost compared with stand alone components. For further details of this OLS 320: look in EHPS Steering Valve with PVE Electrical Actuation Module and OSPCX CN Steering Wheel Technical Information, BC152886484652.

56 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

System sizing

The steering system pump is sized so that satisfactory performance is achieved for both steering and working hydraulics - even at idle.

Before selecting a priority valve, consider

the type of steering unit (LS static, LS dynamic or OSPF LS dynamic)

•

the displacement of the steering unit

•

the pump flow

•

the application’s requirement for energy optimization, initial steering response time and stability, as

•

these all govern the selection for control spring pressure whether the priority valve should have internal PP (Pilot Pressure) or external PP-connection depends

•

on the pressure drop in the pump line between the priority valve’s CF-port (Controlled Flow) and the steering unit’s P-port. With normal hose and tube dimensions and less than 5 m distance between priority valve and steering unit, the immediate choice is normally a priority valve with internal PP.

The following survey lists the code numbers of the priority valves that are the most frequently used in connection with the above Danfoss steering unit types. All priority valves in the code number tables, except OLS 160 static, have internal PP connection. OLS 160 static in the code number table all have external PP connection.

Code numbers and weights

OLS/OLSA static priority valves for load sensing static steering units

OLSA 40 static and OLSA 80 static

Priority valve Code Numbers Control spring

Connections

European version T,R,L: G 3/8 P, EF: G 1/2

OLSA 40 152B0001 - 4 [58] 2.1 [4.63] OLSA 40 152B0002 152B0122 7 [101.5] 2.1 [4.63] OLSA 40 152B0003 152B0124 10 [145] 2.1 [4.63] OLSA 80 152B0016 152B0019 4 [58] 2.1 [4.63] OLSA 80 152B0017 152B0020 7 [101.5] 2.1 [4.63] OLSA80 152B0015 152B0125 10 [145] 2.1 [4.63]

US version T, R, L: 9/16 - 18 UNF P, EF: 7/8 - 14 UNF

pressure bar [psi]

Weight kg [lb]

OLS 40 static and OLS 80 static

Priority valve Code Numbers Control spring

Connections

European version LS: G 1/4 P, EF, CF: G 1/2

OLS 40 152B0231 152B0237 4 [58] 1.0 [2.2] OLS 40 152B0232 152B0238 7 [101.5] 1.0 [2.2] OLS 40 152B0233 152B0253 10 [145] 1.0 [2.2] OLS 80 152B0261 152B0267 4 [58] 1.0 [2.2]

US version LS: 7/16 - 20 UNF CF: 3/4 - 16 UNF P, EF: 7/8 - 14 UNF

pressure bar [psi]

Weight kg [lb]

Danfoss | April 2021 BC152886483962en-001003 | 57

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 40 static and OLS 80 static (continued)

Priority valve Code Numbers Control spring

Connections

European version LS: G 1/4 P, EF, CF: G 1/2

OLS 80 152B0262 152B0268 7 [101.5] 1.0 [2.2] OLS 80 152B0263 152B0280 10 [145] 1.0 [2.2]

OLS/OLSA static priority valves for load sensing statics steering units

OLS 120 static

Priority valve Code Numbers Control spring

Connections

European version LS: G 1/4 CF: G 1/2 P, EF: G 3/4

OLS 120 152B2232 152B2238 7 [101.5] 2.1 [4.63] OLS 120 152B2233 152B2239 10 [145] 2.1 [4.63]

US version LS: 7/16 - 20 UNF CF: 3/4 - 16 UNF P, EF: 7/8 - 14 UNF

US version LS: 7/16 -20 UNF CF: 3/4 - 16 UNF P, EF: 1 1/16 - 12 UNF

pressure bar [psi]

Weight kg [lb]

OLS 160 static

Priority valve Code numbers Control

Connections

European version LS, PP, T: G 1/4 CF: G 1/2 P, EF: G 3/4

OLS 160 152B1005 152B1085 7 [101.5] 170 [2465] 4.4 [9.7] OLS 160 152B1006 152B1086 10 [145] 170 [2465] 4.4 [9.7]

US version LS, PP, T: 7/16 -20 UNF CF: 3/4 - 16 UNF P, EF: 1 1/16 - 12 UNF

spring pressure bar [psi]

Pilot pressure relief valve bar [psi]

Weight kg [lb]

OLS/OLSA dynamic priority valves for load sensing dynamic steering units

OLSA 40 dynamic and OLSA 80 dynamic for OSPC LS dynamic

Priority valve Code numbers Control spring

Connections

European version T,R,L: G 3/8 P/EF: G 1/2

OLSA 40 152B8001 - 4 [58] 2.1 [4.63] OLSA 40 152B8041 152B8042 7 [101.5] 2.1 [4.63] OLSA 40 152B8046 152B8043 10 [145] 2.1 [4.63] OLSA 80 152B8047 - 4 [58] 2.1 [4.63] OLSA 80 152B8048 152B8044 7 [101.5] 2.1 [4.63] OLSA 80 152B8049 152B8045 10 [145] 2.1 [4.63]

US version T,R,L: 9/16 - 18 UNF P/EF: 7/8 - 14 UNF

pressure bar [psi]

Weight kg [lb]

58 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS/OLSA dynamic priority valves for load sensing dynamic steering units

OLS 40 dynamic and OLS 80 dynamic for OSPB, OSPC, OSPD and OSPL LS dynamic

Priority valve Code numbers Control spring

Connections

European version LS: G 1/4 P, EF, CF: G 1/2

OLS 40 152B8231 - 4 [58] 1.0 [2.20] OLS 40 152B8232 152B8253 7 [101.5] 1.0 [2.20] OLS 40 152B8233 152B8254 10 [145] 1.0 [2.20] OLS 80 152B8261 - 4 [58] 1.0 [2.20] OLS 80 152B8256 152B8268 7 [101.5] 1.0 [2.20] OLS 80 152B8257 152B8260 10 [145] 1.0 [2.20]

OLS 80 dynamic with low pressure drop (P-EF) spool for OSPB, OSPC, OSPD and OSPL LS dynamic

Priority valve Code numbers Control spring

Connections

European version LS: G 1/4 P, EF, CF: G 1/2

OLS 80 152B8259 7 [101.5] 1.0 [2.20]

US version LS: 7/16 - 20 UNF CF: 3/4 - 16 UNF P, EF: 7/8 - 14 UNF

pressure bar [psi]

Weight kg [lb]

OLS 120 dynamic for OSPB, OSPC, OSPD and OSPL LS dynamic

Priority valve Code numbers Control spring

Connections

European version LS: G 1/4 CF: G 1/2 P, EF: G 3/4

OLS 120 152B8132 152B8143 7 [101.5] 2.1 [4.63] OLS 120 152B8133 152B8144 10 [145] 2.1 [4.63]

US version LS: 7/16 -20 UNF CF: ¾ - 16 UNF P, EF: 1 1/16 - 12 UNF

pressure bar [psi]

Weight kg [lb]

OLS 160 dynamic for OSPB, OSPC, OSPD and OSPL LS dynamic

Priority valve Code numbers Control

Connections

European version LS, T: G 1/4 CF: G 1/2 P, EF: G 3/4

OLS 160 152B8159 152B8154 7 [101.5] 170 [2465] 4.4 [9.7] OLS 160 152B8160 152B8155 10 [145] 170 [2465] 4.4 [9.7] OLS 160 152B8105 - 12 [174] 170 [2465] 4.4 [9.7] OLS 160 152B8161 152B8156 7 [101.5] 210 [3045] 4.4 [9.7] OLS 160 152B8162 152B8157 10 [145] 210 [3045] 4.4 [9.7]

US version LS, T: 1/16 -20 UNF CF: 3/4 - 16 UNF P, EF: 1 1/16 - 12 UNF

spring pressure bar [psi]

Pilot pressure relief valve bar [psi]

Weight kg [lb]

Danfoss | April 2021 BC152886483962en-001003 | 59

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS dynamic priority valves for OSPF LS and OSPU LS dynamic steering units

OLS 40 dynamic and OLS 80 dynamic

Priority valve Code numbers Control spring

Connections

European version LS: G 1/4 P, EF, CF: G 1/2

OLS 40 152B8031 10 [145] 1.0 [2.20] OLS 80 152B8258 7 [101.5] 1.0 [2.20]

OLS 120 dynamic

Priority valve Code numbers Control spring

Connections

European version LS: G 1/4, CF: G 1/2 P, EF, CF: G 3/4

OLS 120 152B8147 7 [101.5] 2.1 [4.63]

pressure bar [psi]

Weight kg [lb]

OLS 160 dynamic

Priority valve Code numbers Control

Connections

European version LS: G 1/4, CF: G 1/2 P, EF, CF: G 3/4

OLS 160 152B8158 7 [101.5] none 4.4 [9.7] OLS 160 152B8113 10 [145] none 4.4 [9.7]

spring pressure bar [psi]

Pilot pressure relief valve bar [psi]

Weight kg [lb]

OLSP static and dynamic

Priority valve Code numbers Control

Connections

European version LS: G¼ CF: G 3/8 EF: G ½

OLSP 80 static 152B5002 4 [58] 1.0 [2.2] OLSP 80 dynamic 152B5200 7 [101.5] 1.0 [2.2] OLSP 80 dynamic for OSPF and

OSPU

152B5201 7 [101.5] 1.0 [2.2]

spring pressure bar [psi]

Weight kg [lb]

60 | © Danfoss | April 2021 BC152886483962en-001003

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 320 dynamic in-line/stand alone with pilot pressure relief valve, black painted

Priority valve Code numbers Control

Connections

European version LS, T: G¼ CF: G ½ P, EF: G 1

OLS 320 11006593 7 [101.5] 170 [2465] 5.9 [13.0]

OLS 320 dynamic in-line/stand alone without pilot pressure relief valve, black painted

Priority valve Code numbers Control spring

Connections

US version LS: 7/16 - 20 UNF CF: 11/16 - 12 UN P, EF: 15/16 - 12 UN

OLS 320 11007475 10 [145] 5.9 [13.0]

spring pressure bar [psi]

Pilot pressure relief valve bar [psi]

pressure bar [psi]

Weight kg [lb]

OLS 320 for EHPS: look in EHPS Steering Valve with PVE Electrical Actuation Module and OSPCX CN Steering Wheel Technical Information, BC152886484652

If you require other port connections, other control spring pressure and/or other PP connection, go to the survey under System sizing on page 57, and tick off the desired specifications, then consult the Danfoss Sales Organization.

Danfoss | April 2021 BC152886483962en-001003 | 61

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

Specification table for non catalogue numbers of Danfoss Priority Valves

Your company

Your application

Priority valve type

Load sensing type

Spool type Standard Low pressure drop, P-EF (only OLS/OLSA 80 dynamic) No CF cut-off (only for OLS 320 for flanging on EHPS)

Control spring, bar

PP connection

Ports, OLSA

Ports, OLS 40/80

Name Vehicle Potential, pcs/year Completed by Date

Pump flow to OLS/OLSA at idle, l/min [USgal/min] Pump flow to OLS/OLSA at max. engine speed, l/min [USgal/min]

OLSA 40 OLSA 80 OLS 40 OLS 80 OLS 120 OLS 160 OLSP 80 OLS 320 in-line

Static Dynamic Dynamic for OSPF and OSPU steering unit

4 (only OLS 80, 120, 160, OLSP

80)

Internal External (not OLSP)

G: P, EF: G½ - S** T, L, R: G3/8 - S**

P, CF, EF: G½ - S** G: LS: G½ - S**

5.5 (only OLS/OLSA 40/80) 7 10 12 (only OLS 160) 16 (only OLS

160)

Metric 1: P, EF, T, L, R: M18 • 1.5 -O*** +S**

P, EF: M22 • 1.5 - O*** +S** Metric: CF: M18 • 1.5 - O*** +S** LS: M12 • 1.5 - O*** +S**

Metric 2: P, EF: M22 • 1.5 - O*** +S** T, L, R: M18 • 1.5 - O*** +S**

P, EF: 7/8 - 14 UNF - O*** UNF: CF: 3/4 - 16 UNF - O*** LS: 7/16 - 20 UNF - O***

UNF: P, EF: 7/8 - 14 UNF - O*** T, L, R : 9/16 - 18 UNF - O***

Ports, OLS 120

Ports, OLS 160

Ports, OLSP 80 (P: square flange 35)

Ports, OLS 320 in-line

RV-bar OLS 160 OLS 320

Unit black painted

P, EF: G¾ - S** G: CF: G½ - S** LS, PP: G¼ - S**

P, EF: G¾ - S** G 1: CF: G½ - S** LS, PP, T: G¼ - S**

EF: G½ - S** G: CF: G3/8 - S** LS: G¼ - S**

P, EF: G1 - S** G: CF: G½ - S** LS, PP: G¼ - S**

80 90 100 110 120 140 170 190 200 210 Other settings No relief valve

Yes No

P, EF: G1 - S** G 2: CF: G¾ - S** LS, PP, T: G¼ - S**

P, EF: M27 • 2 - O*** +S** Metric: CF: M18 • 1.5 - O*** +S** LS: M12 • 1.5 - O*** +S**

P, EF: 11/16 - 12 UN - O*** UNF 1: CF: 3/4 - 16 UNF - O*** LS, PP, T: 7/16 - 20 UNF - O***

EF: M22 • 1.5 - S** Metric: CF: M18 • 1.5 - S** LS: M12 • 1.5 - S**

P, EF: 1 5/16 - 12 UN - O*** UNF 1: CF: 3/4 - 16 UNF - O*** LS, PP, T: 7/16 - 20 UNF - O***

P, EF: 11/16 - 14 UNF - O*** UNF: CF: 3/4 - 16 UNF - O*** LS: 7/16 - 20 UNF - O***

P, EF:15/16 - 12 UN - O*** UNF 2: CF: 7/8 - 14 UNF - O*** LS, PP, T: 7/16 - 20 UNF - O***

EF: 7/8 - 14 UNF - O*** UNF: CF: 3/4 - 16 UNF - O*** LS : 7/16 - 20 UNF - O***

P, EF: 1 5/16 - 12 UN - O*** UNF 2: CF: 1 1/16 - 12 UNF - O*** LS, PP, T: 7/16 - 20 UNF - O***

bar

Ports: PP-port only exists when external PP connection is used. T-port only exists for OLS 160 and OLS 320 with integrated pilot pressure relief valve (RV)

O*: O-ring chamfer on port connections

62 | © Danfoss | April 2021 BC152886483962en-001003

200

175

150

125

100

psi bar

152B139.11

0 5 10 15 20 25 30 35 40 l/min

P-EF P-EF

0 1 2 3 4 5 6 7 8 9 10 US gal/min

4 bar 58 psi

7 bar 102 psi

10 bar 145 psi

min

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

S**: Spot face around port connections An alternative way to specify a variant is to state an existing code number and add the modifications, you

would like to have implemented in the basic steering unit. Code number of basic steering unit: __________________________________________________ Requested modifications:

_______________________________________________________________________

Technical data

Max. pressure on connections

Priority valve

Rated flow to Pconnection

l/min [US

Max. pressure on connections P, EF CF L, R LS T PP

bar [psi] bar [psi] bar [psi] bar [psi] bar [psi] bar [psi]

gal/min]

OLSA 40 40 [10.57] 250 [3625] 240 [3480] 280 [4061] 240 [3480] 20 [290] - OLSA 80 80 [21.13] 250 [3625] 240 [3480] 280 [4061] 240 [3480] 20 [290] - OLS 40 40 [10.57] 280 [4061] 240 [3480] - - 240 [3480] - - 210 [3045] OLS 80 80 [21.13] 280 [4061] 240 [3480] - - 240 [3480] - - 210 [3045] OLS 120 120 [31.70] 300 [4351] 240 [3480] - - 240 [3480] - - 210 [3045] OLS 160 160 [42.27] 350 [5076] 240 [3480] - - 240 [3480] 15 [217] 210 [3045] OLSP 80 80 [21.13] 280 [4061] 240 [3480] - - 240 [3480] - - - OLS 320 320 [84.54] 300 [4351] 280 [4061] - - 280 [4061] 40 [580] 280 [4061]

Pressure drop in priority valves

This data comes from measurements on a representative sample of priority valves from production. Oil with viscosity of 21 mm²/s at 50 °C [102 SUS at 122 °F] was used during measuring. Measurement made when pressure on the LS connection is zero (steering unit in neutral position). The minimum curves apply when the pressure on the EF connection is higher than the actual control spring pressure. The curves for control spring pressure of 4 , 7, 10 or 12 bar [58, 101, 145 or 174 psi] apply when pressure on the EF connection is zero.

Pressure drop P-EF for static priority valves

OLSA/OLS 40

Danfoss | April 2021 BC152886483962en-001003 | 63

psi bar

0 10 20 30 40 50 60 70 80 l/min

0 2 4 6 8 10 12 14 16 18 20 US gal/min

10 bar 145 psi

7 bar 102 psi

4 bar 58 psi

min.

152B80.11

225

200

175

150

125

100

P-EF P-EF

225

200

175

150

125

100

psi bar

152B165.11

0 10 20 30 40 50 60 70 80 90 100 110 120 l/min

P-EF P-EF

0 5 10 15 20 25 30 US gal/min

7 bar 102 psi

10 bar 145 psi

min

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLSA/OLS 80

OLS 120

64 | © Danfoss | April 2021 BC152886483962en-001003

275 250 225 200 175 150 125 100

75 50 25

20 18 16 14 12 10

8 6 4 2 0

psi bar

152B166.10

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 l/min

P-EF P-EF

0 5 10 15 20 25 30 35 40 US gal/min

7 bar 102 psi

10 bar 145 psi

12 bar 174 psi

min

225

200

175

150

125

100

psi bar

152B174.10

0 5 10 15 20 25 30 35 40 l/min

P-EF P-EF

0 1 2 3 4 5 6 7 8 9 10 US gal/min

7 bar 102 psi

10 bar 145 psi

4 bar 58 psi

min

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 160

Pressure drop P-EF for dynamic priority valves

OLSA/OLS 40

Danfoss | April 2021 BC152886483962en-001003 | 65

275 250 225 200 175 150 125 100

75 50 25

20 18 16 14 12 10

8 6 4 2 0

psi bar

152B175.10

0 10 20 30 40 50 60 70 80 l/min

P-EF P-EF

0 2 4 6 8 10 12 14 16 18 20 US gal/min

7 bar 102 psi

10 bar 145 psi

4 bar 58 psi

min

A+B

275 250 225 200 175 150 125 100

75 50 25

psi bar

152B176.10

0 10 20 30 40 50 60 70 80 90 100 110 120 l/min

P-EF P-EF

0 5 10 15 20 25 30 US gal/min

7 bar 102 psi

10 bar 145 psi

min

A+B

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLSA/OLS 80

A: OLS/OLSA 80 Dynamic for OSPB, OSPC, OSPF, OSPD, OSPQ, OSPL LS Dynamic B: OLS/OLSA 80 Dynamic with low pressure drop (P-EF) spool for OSPB, OSPC, OSPD, OSPQ, OSPL LS

Dynamic

OLS 120

A: OLS 120 Dynamic for OSPB, OSPC, OSPD, OSPQ, OSPL LS Dynamic B: OLS 120 Dynamic for OSPF LS Dynamic and for OSPU LS Dynamic

450

400

350

300

250

200

150

100

psi bar

152B177.10

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 l/min

P-EF P-EF

0 5 10 15 20 25 30 35 40 US gal/min

7 bar 102 psi

10 bar 145 psi

12 bar 174 psi

min

A+B

175

150

125

100

psi bar

152-181.10

0 10 20 30 40 50 60 70 80 l/min

P-EF P-EF

0 2 4 6 8 10 12 14 16 18 US gal/min

7 bar 102 psi

4 bar 58 psi

min

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 160

A: OLS 160 Dynamic for OSPB, OSPC, OSPD, OSPL LS Dynamic B: OLS 160 Dynamic for OSPF LS and for OSPU LS Dynamic

Pressure drop P-EF for OLSP static priority valves

OLSP 80

Danfoss | April 2021 BC152886483962en-001003 | 67

175

150

125

100

psi bar

152-182.10

0 10 20 30 40 50 60 70 80 l/min

P-EF P-EF

0 2 4 6 8 10 12 14 16 18 US gal/min

4 bar 58 psi

min

7 bar 102 psi

B A

A+B

250 225 200 175 150 125 100

75 50 25

psi bar

152B185.10

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 l/min

P-EF P-EF

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 US gal/min

7 bar 102 psi

10 bar 145 psi

min.

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

Pressure drop P-EF for OLSP dynamic priority valves

A: OLSP 80 Dynamic for OSPB, OSPC, OSPD, OSPL LS Dynamic B: OLSP 80 Dynamic for OSPF LS and for OSPU LS Dynamic

Pressure drop P-EF for OLS 320 static priority valves

OLS 320

450

400

350

300

250

200

150

100

psi bar

152B186.10

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 l/min

P-EF P-EF

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 US gal/min

7 bar 102 psi

10 bar 145 psi

min

2800

2700

2600

2500

2400

2300

2200

190

180

170

160

150

psi bar

152B141.11

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 l/min

P-T P-T

0 5 10 15 20 25 30 35 40 US gal/min

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

Pressure drop P-EF for OLS 320 dynamic priority valves

OLS 320

OLS 160 and OLS 320, pilot pressure relief valve (P - T, Qp) characteristics

OLS 160 and OLS 320 with pilot pressure relief valves are used in connection with Danfoss steering units without pilot pressure relief valve, normally steering unit type OSPL. The pilot pressure relief valve protects the steering unit against excessive pressure. The pilot pressure relief valve in OLS 160/320 operates with the priority valve spool in the OLS 160/320 to limit the maximum steering pressure P-T measured across the steering unit ports.

OLS 160:The pilot pressure relief valve is set when an oil flow of 80 l/min [21 US gal/min] is supplied to OLS 160.

OLS 320:The pilot pressure relief valve is set when an oil flow of 40 l/min [11 US gal/min] is supplied to OLS 320.

OLS 160 and OLS 320: Setting tolerance: rated value +10 bar [145 psi]

OLS 160

Danfoss | April 2021 BC152886483962en-001003 | 69

3000 2900 2800 2700 2600 2500 2400 2300 2200 2100

210

200

190

180

170

160

150

psi bar

152B187.10

0 40 80 120 160 200 240 280 320 l/min

HP-HT HP-HT

0 10 20 30 40 50 60 70 80 US gal/min

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 320

Qp = Pump flow

R L

44 [1.73]

R/CF

7 [0.28]

20 [0.79]

152B81.12

44 [1.73] 29 [1.14]

55 [2.17]

120 [4.72]

87 [3.43]

20 [0.79]

40 [1.57]

76 [2.99]

29 [1.14]

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

Dimensions

OLSA

Danfoss | April 2021 BC152886483962en-001003 | 71

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

European version: US version:

P, EF: G 1/2 w. spot face 14 mm [0.55 in] deep x = 34 mm [1.34 in], max. 1,5 mm [0.06 in] deep or M18 x 1.5 ISO 6149

14.5 mm [0.57 in] deep x = 29 mm [1.14 in], max. 1.5 mm [0.06 in] deep or M22 x 1.5 ISO 6149,

15.5 mm [0.61 in] deep x = 34 mm [1.34 in], max. 1.5 mm [0.06 in] deep

T, L, R: G 3/8 w. spot face 12 mm [0.47 in] deep y = 34 mm [1.34 in], max. 1.5 mm [0.06 in] deep or M18 x 1.5 ISO 6149, 15 mm [0.59 in] deep y = 29 mm [1.14 in], max. 1.5 mm [0.06 in] deep

P, EF: 7/8-14 UNF O-ring boss

16.7 mm [0.66 in] deep x = 34 mm [1.34 in], max. 1.5 mm [0.06 in] deep

T, L, R: 9/16 - 18 UNF O-ring boss

12.7 mm [0.50 in] deep y = 25 mm [0.98 in], max. 1.5 mm [0.06 in] deep

42 [1.65]

Ø8.9 [0.350] Ø8.5 [0.335]

152B136.11

19.7 [0.776]

41 [1.61]

139 [5.47]

19.7 [0.776]

25 [0.98]

40.3 [1.587]

22 [0.87]

20.3 [0.799]

39 [1.54]

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 40, OLS 80

European version: US version:

P, EF: G 1/2 w. spot face 15 mm [0.59 in] deep x = 29 mm [1.14 in], max. 1.5 mm [0.06 in] deep or M22 x 1.5 ISO 6149 15 mm [0.59 in] deep, x = 34 mm [1.34 in],

P, EF: 7/8 - 14 UNF O-ring boss 15 mm [0.59 in] deep x = 34 mm [1.14 in], max. 1.3 [0.05] deep

max. 1 mm [0.04 in] deep CF:

G 1/2 w. spot face 14 mm [0.55 in]deep y = 29 mm [1.14 in], max. 1.5 mm [0.06 in] deep or M18 x 1,5 ISO 6149 12 mm [0.47 in] deep, y = 29 mm [1.14 in],

CF: 3/4-16 UNF O-ring boss

14.3 mm [0.56 in] deep y = 30 mm [1.18 in], max. 1.3 mm [0.05 in] deep

max. 1 mm [0.04 in] deep LS:

G 1/4 w. spot face

12.5 mm [0.49 in] deep z = 21mm [0.83 in],

Danfoss | April 2021 BC152886483962en-001003 | 73

LS: 7/16-20 UNF O-ring boss

12.5 mm [0.49 in] deep z = 21 mm [0.83 in],

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

max. 1 mm [0.04 in] deep or M12 x 1,5 ISO 6149 12,5 mm [0.49 in] deep, z = 22 mm [0.86 in] 0 mm deep

max. 1 mm [0.04 in] deep

Z Z

10 [0.39]

X X

38.4 [1.512]

152B173.11

114 [4.49]

18.7 [0.736]

24 [0.94]

56 [2.20]

Ø9.1 [0.358] Ø8.7 [0.343]

96 [3.78]

53 [2.09]

66 [2.60]

80 [3.15]

140 [5.51]

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 120

Danfoss | April 2021 BC152886483962en-001003 | 75

European version: US version:

P, EF: G 3/4 w. spot face x = 42 mm [1.65 in], max. 2.5 mm [0.10 in] deep or M27 x 2 ISO 6149 x = 40 mm [1.57 in], max. 2.5 mm [0.10 in] deep

CF: G 1/2 w. spot face y = 34 mm [1.34 in], max. 2.5 mm [0.10 in] deep or M18 x 1.5 ISO 6149 y = 29 mm [1.14 in], max. 2.5 mm [0.10 in] deep

LS, PP: G 1/4 w. spot face 12 mm [0.47 in] deep z = 19 mm [0.75 in] 0 mm deep or M12 x 1,5 ISO 6149 11,5 mm [0.45 in] deep, z = 19 mm [0.75 in] 0 mm deep

P, EF: 1 1/16 - 12 UN O-ring boss x = 41mm [1.61 in], max. 1.5 mm [0.06 in] deep

CF: 3/4 - 16 UNF O-ring boss y = 30 mm [1.18 in], max. 1.5 mm [0.06 in] deep

LS, PP: 7/16 - 20 UNF O-ring boss

11.5 mm [0.45 in] deep z = 19 mm [0.75 in] 0 mm deep

178 [7.01]

75 [2.95]

33 [1.26]

25 [0.98]

32 [1.26]

ø8.9 ± 0.2 [ø0.35 ± 0.01]

35 [1.38] 63 [2.48]

130 [5.12]

ø8.9 ± 0.2 [ø0.35 ± 0.01]

32 [1.26]

61.3 [2.41]

124 [4.88]

33 [1.30]

66 [2.60]

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 160

European version: US version:

P, EF: G 3/4 w. spot face x = 42 mm [1.65 in], max. 2.5 mm [0.10 in] deep or G 1 w. spot face x = 47 mm [1.85 in], max 2.5 mm [0.10 in] deep

CF: G 1/2 w. spot face y = 34 mm [1.34 in], max. 2.5 mm [0.10 in] deep or G 3/4 w. spot face y = 38 mm [1.50 in], max. 2.5 mm [0.10 in] deep

LS, PP, T: G 1/4 w. spot face 12 mm [0.47 in] deep z = 22.8 mm [0.89 in], max. 1 mm [0.04 in]deep u = 25 mm [0.98 in] max. 1.5 mm [0.06 in] deep

P, EF: 1 1/16-12 UNF O-ring boss x = 41 mm [1.61 in], max. 2.5 mm [0.10 in] deep or 1 5/16 - 12 UNF O-ring boss x = 49 mm [1.93 in], max. 2.5 mm [0.10 in] deep

CF: 3/4-16 UNF O-ring boss y = 32 mm [1.26 in], max. 2.5 mm [0.10 in] deep 7/8 - 14 UNF O-ring boss y = 30 mm [1.18 in], max. 2.5 mm [0.10 in] deep

LS, PP, T: 7/16 - 20 UNF O-ring boss

11.5 mm [0.45 in] deep z = 22,8 mm [0.89 in], max. 1.5 mm [0.06 in] deep u = 21 mm [0.83 in], max. 1.6 mm [0.06 in] deep

152-180.11

20 [0.89]

25 [0.98]

32 [1.26]

38 [1.50]

84 [3.31]

33 [1.30]

24.7 [0.972]

Ø24.4 [0.961]

1.88 [0.74] deep

52 [2.05]

19.5 [0.768]

24 [0.94]

38 [1.50]

31.2 [1.228]

43.5 [1.713]

91 [3.58]

Ø11 [0.04]

Ø6.5 [0.26]

33 [1.30]

24.7 [0.972]

CF EF

X Y

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLSP 80

European version: US version:

CF: G 3/8 w. spot face 15 mm [0.59 in] deep x = ø28, max. 1.5 mm [0.06 in] deep or M18 • 1.5 ISO 6149 15 mm [0.59 in] deep

CF: 3/4-16 UNF O-ring boss 15 mm [0.59 in] deep x = ø29 [1.14 in] max. 1.5 mm [0.06 in] deep

y = ø29, max. 1.5 mm [0.06 in] EF:

G 1/2 w. spot face 15 mm [0.59 in] deep y = ø34, max. 1.5 mm [0.06 in] or M22 • 1.5 ISO 6149 15 mm [0.59 in] deep

EF: 7/8 - 14 UNF O-ring boss

16.7 mm [0.66 in] deep y = ø34 [1.34 in] max. 1.5 mm [0.06 in] deep

x = ø34, max. 1.5 mm [0.06 in] LS:

G 1/4 w. spot face

12.5 mm [0.49 in] deep or M12 • 1.5 ISO 6149 12.5 mm

LS: 7/16 - 20 UNF O-ring boss

12.5 mm [0.49 in] deep

[0.49 in] deep

Danfoss | April 2021 BC152886483962en-001003 | 77

117.5 [4.626]

4 [0.16]5 [0.20]

48 [1.89]

22.5 [0.886]

78 [3.07]

14 [0.55]

47.5 [1.870]

236 [9.29]

3xØ20 [0.79]33 [1.30]

7 [0.28]

59 [2.32] 2xØ16 [0.63] 3xØ8.5 [0.335]

47.5 [1.870] 47.5 [1.870]

150H26.10

47 [1.85] 80 [3.15]

52.5 [2.067] 63.5 [2.500]

X X

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Priority Valves OLSA, OLS, and OLSP

OLS 320 in-line

European version: US version:

P, EF: G 1 w. spot face x = ø47 mm [1.85 in] max 1 mm [0.04 in] deep

CF: G 1/2 w. spot face y = ø34 mm [1.34 in] max 2.5 mm [0.10 in] deep

LS, PP: G 1/4 w. spot face

T: G 1/4 w. spot face z = ø25 mm [0.98 in] max 1.5 mm [0.06 in] deep

P, EF: 1 5/16-12 UN O-ring boss x = ø49 mm [1.93 in] max 0.2 mm [0.01 in] deep

CF: 1 1/16-12 UN O-ring boss y = ø41 mm [1.61 in] max 0.2 mm [0.01 in] deep or 3/4-16UNF O-ring boss y = ø30 mm [1.18 in] max 0.2 mm [0.01 in] deep

LS, PP, T: 7/16-20 UNF O-ring boss

150F56.10

L R

150F55.10

150F69.10

150F54.10

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Flow Amplifiers OSQA and OSQB

Versions

OSQA and OSQB static

Flow amplifier OSQ is used in steering systems of large vehicles and vessels that need high oil flow for their steering. A steering system of this nature consists of a steering unit and a flow amplifier.

OSQA static OSQB static

Danfoss | April 2021 BC152886483962en-001003 | 79

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Flow Amplifiers OSQA and OSQB

Code numbers and weights

OSQA and OSQB static flow amplifiers for load sensing static steering units

These flow amplifiers have to be used in connection with steering units type OSPBX LS or OSPLX LS.

Flow amplifier

OSQA 4 150F0040 150F0043 170 [2465] 230 [3335] 7 [101] 29 [64] OSQA 5 150F0041 150F0044 170 [2465] 230 [3335] 7 [101] 29 [64] OSQA 8 150F0042 150F0045 170 [2465] 230 [3335] 7 [101] 29 [64] OSQB 4 150F0030 150F0053 170 [2465] 230 [3335] 7 [101] 29 [64] OSQB 5 150F0031 150F0054 170 [2465] 230 [3335] 7 [101] 29 [64] OSQB 8 150F0032 150F0055 170 [2465] 230 [3335] 7 [101] 29 [64] OSQB 10 - 150F0094 170 [2465] 260 [3770] 7 [101] 29 [64]

Code numbers Setting pressures Control

Connections: see

Dimensions

European version

on page 86

US version

Pilot pressure relief valve bar [psi]

Shock valves bar [psi]

spring pressure bar [psi]

Weight kg [lb]

If you require other amplification factors, other valve settings or other control spring pressures, please fill in the order form under Specification table for non catalogue numbers of Danfoss Priority Valves on page 62 and contact the Danfoss Sales Organization.

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Flow Amplifiers OSQA and OSQB

Specification table for non catalogue numbers of Danfoss Flow Amplifier

Fill in your company data and place x’s in the table where appropriate, then send to your Danfoss Sales Organization

Your company

Your application

Flow amplifier type

Amplification factor

Load sensing type

Control spring bar

PP-connection Internal External

Ports, OSQA G: European version

Ports, OSQB G: European version

Name Vehicle Potential pcs/year Completed by Date

Pump flow to OSQ at idle, l/min [US gal/min] Pump flow to OSQ at max engine speed, l/min [US gal/min]

OSQA OSQB

4 5 8 10

Static Dynamic

7 [101] 10 [145] 16 [232]

HP, EF, HT, CL, CL: G 3/4 P, T, L, R: G 1/2 PP, LS: G 1/4

HP, EF,: 1 1/4 in SAE flange HT, CL, CR: 1 in SAE flange P, T, L, R: G 1/2 PP, LS: G 1/4

UNF: US version HP, EF, HT, CL, CR: 1 1/16 - 12 UN P, T, L, R: 3/4 - 16 UNF PP, LS: 7/16 - 20 UNF

UNF: US version HP, EF: 1 ¼ in SAE flange HT, CL, CR: 1 in SAE flange P, T, L, R: ¾ - 16 UNF

PP, LS: 7/16 - 20 UNF

Pilot pressure relief valve bar [psi]

Shock valves, bar [psi]

Unit black painted

100 [1450] 120 [1740] 140 [2030] 170 [2465] 210 [3045] 240 (3480)

165 [2393] 200 [2900] 230 [3335] 260 [3770] 270 [3916]

Yes No

An alternative way to specify a variant is to state an existing code number and add the modifications, you would like to have implemented in the basic flow amplifier.

Code number of basic flow amplifier: __________________________ Requested modifications:

_______________________________________________________________________________________ _______________________________________________________________________________________ __________________________________________________

Danfoss | April 2021 BC152886483962en-001003 | 81

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Flow Amplifiers OSQA and OSQB

Technical data

Flow and pressure

Flow amplifier Rated flow to

HP-connection l/min [US gal/min]

OSQA 240 [63.4] 280 [4061] 240 [3480] 15 [217.5] 15 [217.5] OSQB 400 [106] 280 [4061] 240 [3480] 10 [145] 15 [217.5]

Max. pressure on connections

HP, EF, CL CR bar [psi]

LS, PP, P, L, R bar [psi]

HT bar [psi]

T bar [psi]

Total displacement of Steering System

Flow amplifier

OSQA 4 4 640 [39] 800 [49] 1260 [77] 1600 [98] 2080 [127] OSQA 5 5 800 [49] 1000 [61] 1575 [96] 2000 [122] OSQA 8 8 1280 [78] 1600 [98] OSQA1010 1600 [98]

OSQB 4 4 2080 [127] 2520 [154] 3200 [195] OSQB 5 5 2000 [122] 2600 [159] 3150 [192] 4000 [244] OSQB 8 8 2520 [154] 3200 [195] 4160 [254] OSQB 10 10 2000 [122] 3150 [192] 4000 [244]

Amplification factor

Steering unit

OSPBX/OSPCX LS OSPLX LS

160 cm³/rev [in³/rev]

200 cm³/rev [in³/rev]

315 cm³/rev [in³/rev]

400 cm³/rev [in³/rev]

520 cm³/rev [in³/rev]

630 cm³/rev [in³/rev]

800 cm³/rev [in³/rev]

Installation

The flow amplifier has to be mounted on a flat surface.

Mounting screw Tightening torque, Nm [lbf.in]

M 10 x 1.5 30 ±5 [265 ±44] 3/8 - 16 UNC 40 ±5 [354 ±44] 7/16 - 14 UNC 55 ±5 [487 ±44]

Tightening torque for fittings: Look in sub catalogue “General Steering Components” page 36.

Valve functions in the flow amplifiers

The data below come from measurements on a representative sample of flow amplifiers from production. Oil with viscosity of 21 mm²/s [102 SUS] at 50 °C [122 °C] was used during measuring.

Priority valve

The priority valve is used in load sensing systems where the same pump supplies oil to both the steering system and working hydraulics. The steering system always has first priority. Measurements were made when the pressure on the LS connection is zero (steering unit is in neutral position). The minimum curves apply when the pressure on the EF connection is higher than the actual control spring pressure. The curves for control spring pressure of 7 bar [101.5 psi] apply when the pressure on the EF connection is zero

150

125

100

psi bar

7 bar

102 psi

min.

150F64.10

0 20 40 60 80 100 120 140 160 180 200 220 240 l/min

HP-EF HP-EF

0 10 20 30 40 50 60 US gal/min

200

175

150

125

100

psi bar

7 bar

102 psi

min.

150F63.11

0 40 80 120 160 200 240 280 320 360 400 l/min

HP-EF HP-EF

0 10 20 30 40 50 60 70 80 90 100 US gal/min

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Flow Amplifiers OSQA and OSQB

OSQA

OSQB

OSQ pilot pressure relief valve (HP - HT, Qp) characteristic

The pilot pressure relief valve protects the steering valve against excessive pressure. The pilot pressure relief valve together with the priority valve limit the maximum steering pressure HP-HT.

The pilot pressure relief valve in OSQ is set with an oil flow of 140 l/min [37 US gal/min] supplied to the HP connection.

For OSQA the setting values are valid for pump flow 140 l/min [37 US gal/min]. For OSQB the setting values are valid for pump flow 240 l/min [63 US gal/min]: the setting is done at 140

l/min [37 US gal/min], but compensated to match 240 l/min [63 US gal/min]. Setting tolerance: rated value +10 bar [+145 psi]. The curves below are valid for rated settings 170 bar

[2466 psi].

Danfoss | April 2021 BC152886483962en-001003 | 83

150

155

160

165

170

175

180

185

190

0 20 40 60 80 100 120 140 160 180 200 220 240

OSQA

l/min

bar

150F67.12

psi

HP-HT HP-HT

2700

2600

2500

2400

2300

2200

0 10 20 30 40 50 60 US gal/min

140

150

160

170

180

190

200

0 40 80 120 160 200 240 280 320 360 400

OSQB

l/min

bar

2900

2800

2700

2600

2500

2400

2300

2200

2100

psi

150F66.12

HP-HT HP-HT

0 10 20 30 40 50 60 70 80 90 100 US gal/min

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Flow Amplifiers OSQA and OSQB

OSQA

OSQB

Back pressure valve

The back pressure valve in (OSQB only) increases the capacity of the suction valves. The pressure drop shown applies to the back pressure valve only.

225

200

175

150

125

100

psi

bar

150F68.10

0 40 80 120 160 200 240 280 320 360 400 l/min

∆ p ∆ p

0 10 20 30 40 50 60 70 80 90 100 US gal/min

150

100

psi bar

150F35.11

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 l/min

HT-CR HT-CL

0 5 10 15 20 25 30 35 40 US gal/min

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Flow Amplifiers OSQA and OSQB

Shock valves

The shock valves protect the flow amplifier against shock from external forces on the steering cylinders. The shock valves in OSQA and OSQB limit the maximum pressure drop from CL to HT and from CR to HT. The shock valves are set at 10 l/min [2.64 US gal/min].

Setting tolerance: rated value +20 bar [290 psi].

Suction valves

The suction valves ensure oil suction on the side of the steering cylinder pistons where in unfavorable conditions cavitation might occur. The capacity of the suction valves is increased in OSQB by the built-in back pressure valve.

Danfoss | April 2021 BC152886483962en-001003 | 85

150F36.11

129 [5.08]

17 [0.67]

120.2 [4.73]

119.8 [4.72]

165 [6.50]

153 [6.02]

112 [4.41]

82 [3.23]

min. 21 [0.83]

5.3 [0.21]

4.7 [0.19]

121 [4.76]

56 [2.20]

41 [1.61]

31 [1.22] 31 [1.22]

86 [3.39] 86 [3.39]

68 [2.68]

150 [5.91]

16 [0.63]

78 [3.07] 47 [1.85] 5 [0.20]

75.2 [2.96]

74.8 [2.94]

150.2 [5.91]

149.8 [5.90] 285 [11.22]

Ø16.018 [0.631]

Ø16.000 [0.630]

Ø16.018 [0.631]

Ø16.000 [0.630]

55 [2.17]

125 [4.92] 125 [4.92]

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Flow Amplifiers OSQA and OSQB

Dimensions

OSQA

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Flow Amplifiers OSQA and OSQB

European version: US version:

HP, EF, HT, CL, CR: G ¾ P, T, L, R: G 1/2 PP, LS: G 1/4

A: M10 x 1.5, 21 mm [0.83in] deep B: M10 x 1.5, 16 mm [0.63 in] deep

HP, EF, HT, CL, CR: 1 1/16 - 12 UN P, T, L, R: ¾ - 16 UNF PP, LS: 7/16 - 20 UNF

A: 7/16 - 14 UNC, 21 mm [0.83 in]deep B: 7/16 - 14 UNC, 16 mm [0.63 in] deep

Danfoss | April 2021 BC152886483962en-001003 | 87

150F37.10

129 [5.08]

17 [0.67]

120.2 [4.73]

119.8 [4.72]

165 [6.50]

153 [6.02]

112 [4.41]

82 [3.23]

58.7 [2.31]

min. 21 [0.83]

5.3 [0.21]

4.7 [0.19]

121 [4.76]

56 [2.20]

41 [1.61]

31 [1.22] 31 [1.22]

26.2 [1.03]26.2 [1.03]

26.2 [1.03]

52.4 [2.06]

86 [3.39] 86 [3.39]

68 [2.68]

150 [5.91]

16 [0.63]

78 [3.07]

30.2 [1.19]30.2 [1.19]

47 [1.85] 5 [0.20]

75.2 [2.96]

74.8 [2.94]

150.2 [5.91]

149.8 [5.90]

285 [11.22]

Ø16.018 [0.631]

Ø16.000 [0.630]

Ø16.018 [0.631]

Ø16.000 [0.630]

55 [2.17]

52.4 [2.06]

125 [4.92]

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Flow Amplifiers OSQA and OSQB

OSQB

European version: US version:

Technical Information

OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers

Flow Amplifiers OSQA and OSQB

HP, EF: 1 1/4 in SAE flange 7/16-14 UNC 18 mm [0.71 in] deep (8)

HT, CL, CR: 1 in SAE flange 3/8 - 16 UNC 18 mm [0.71 in] deep (12)

P, T, L, R: G 1/2 PP, LS: G 1/4

A: M10 x 1,5, 21 mm [0.83 in] deep B: M10 x 1,5, 16 mm [0.63 in] deep

HP, EF: 1 1/4 in SAE flange 7/16 - 14 UNC 18 mm [0.71 in] deep (8)

HT, CL, CR: 1 in SAE flange 3/8 - 16 UNC 18 mm [0.71 in] deep (12)

P, T, L, R: 3/4 - 16 UNF PP, LS: 7/16 - 20 UNF

A: 7/16 - 14 UNC, 21 mm [0.83 in] deep B: 7/16 - 14 UNC, 16 mm [0.63 in] deep

Danfoss | April 2021 BC152886483962en-001003 | 89

Danfoss Power Solutions GmbH & Co. OHG

Krokamp 35 D-24539 Neumünster, Germany Phone: +49 4321 871 0

Danfoss Power Solutions ApS

Nordborgvej 81 DK-6430 Nordborg, Denmark Phone: +45 7488 2222

Danfoss Power Solutions (US) Company

2800 East 13th Street Ames, IA 50010, USA Phone: +1 515 239 6000

Danfoss Power Solutions Trading (Shanghai) Co., Ltd.

Building #22, No. 1000 Jin Hai Rd Jin Qiao, Pudong New District Shanghai, China 201206 Phone: +86 21 2080 6201

Products we offer:

Hydro-Gear

www.hydro-gear.com

Daikin-Sauer-Danfoss

www.daikin-sauer-danfoss.com

Cartridge valves

•

DCV directional control

•

valves Electric converters

•

Electric machines

•

Electric motors

•

Gear motors

•

Gear pumps

•

Hydraulic integrated

•

circuits (HICs) Hydrostatic motors

•

Hydrostatic pumps

•

Orbital motors

•

PLUS+1® controllers

•

PLUS+1® displays

•

PLUS+1® joysticks and

•

pedals PLUS+1® operator

•

interfaces PLUS+1® sensors

•

PLUS+1® software

•

PLUS+1® software services,

•

support and training Position controls and

•

sensors PVG proportional valves

•

Steering components and

•

systems Telematics

•

Danfoss Power Solutions is a global manufacturer and supplier of high-quality hydraulic and electric components. We specialize in providing state-of-the-art technology and solutions that excel in the harsh operating conditions of the mobile off-highway market as well as the marine sector. Building on our extensive applications expertise, we work closely with you to ensure exceptional performance for a broad range of applications. We help you and other customers around the world speed up system development, reduce costs and bring vehicles and vessels to market faster.

Danfoss Power Solutions – your strongest partner in mobile hydraulics and mobile electrification.

Go to www.danfoss.com for further product information.

We offer you expert worldwide support for ensuring the best possible solutions for outstanding performance. And with an extensive network of Global Service Partners, we also provide you with comprehensive global service for all of our components.

Local address:

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequent changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

Danfoss | April 2021 BC152886483962en-001003

Danfoss OSPB, OSPC, OSPF, OSPDOSPL, OSPLS User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

A wide range of steering components

Conversion factors

Survey of literature on Danfoss steering components

LS Steering Units OSPB, OSPC, OSPF, OSPD, OSPL

Versions

OSPB LS: Steering unit with no valve functions

OSPC LS: Steering unit load sensing with integrated valve functions for in line priority valve OLS

OSPC LS: Steering unit load sensing with integrated valve functions for flange on priority valve OLSA

OSPC LSR: Steering unit load sensing dynamic with integrated valve functions

OSPF LS : Steering unit full drain load sensing dynamic and with integrated valve functions

OSPD LS: Steering unit load sensing dynamic with 2 rotary meters and with integrated valve functions

OSPL LS:

OSPBX LS, OSPCX LS and OSPLX LS: Steering units load sensing for flow amplifiers

Code numbers and weights

OSPB load sensing static non-reaction steering units

OSPB load sensing dynamic non-reaction steering units

OSPC load sensing static non-reaction steering unit

OSPC load sensing dynamic non-reaction steering units

OSPC load sensing dynamic reaction steering units

OSPF load sensing dynamic non-reaction steering units

OSPD load sensing non-reaction steering units

OSPL load sensing static non-reaction steering units

OSPL load sensing dynamic non-reaction steering units

OSPBX and OSPLX load sensing static steering units for OSQ static

OSPCX load sensing dynamic steering units for OSQ dynamic

Specification table for non catalogue numbers of LS Steering Units

Technical data

Displacement, flow and pressure: OSPB LS, OSPC LS, OSPC LSR

Displacement, flow and pressure: OSPF LS

Displacement, flow and pressure: OSPD LS

Displacement, flow and pressure: OSPL LS, OSPBX LS, OSPCX LS, OSPLX LS

Valve functions in OSPC, OSPF, OSPD and OSPL LS steering units

Pilot pressure relief valve; (P - T, Qp) characteristic

Shock valves

Suction valves

Check valves

Port thread versions for OSPB LS, OSPC LS/LSR, OSPF LS, OSPD LS/LSR, OSPL LS, OSPBX LS, OSPCX LS, OSPLX LS

Dimensions

OSPB LS for OLS, OSPBX LS for OSQ

OSPC LS/LSR and OSPF LS for OLS, OSPCX LS for OSQ

OSPD LS/LSR for OLS

OSPL LS for OLS and OSPLX LS for OSQ

OSPL 1200 LS for OLS

Valve Block OVPL

Versions

Code numbers and weight

Technical data

Valve functions

Common data

Shock valves

Suction valves

Check valve

Backpressure valve

Installation

Dimensions

Angle Block OVR

Version

Code numbers and weight

Installation

Dimensions

Priority Valves OLSA, OLS, and OLSP

Versions

OLSA 40/80

OLS 40/80 and OLS 120

OLS 160

OLSP 80

OLS 320

OLS 320 without pilot pressure relief valve

System sizing

Code numbers and weights

OLS/OLSA static priority valves for load sensing static steering units

OLS/OLSA static priority valves for load sensing statics steering units

OLS/OLSA dynamic priority valves for load sensing dynamic steering units

OLS/OLSA dynamic priority valves for load sensing dynamic steering units

OLS dynamic priority valves for OSPF LS and OSPU LS dynamic steering units