Danfoss PVG 32 AG User guide
MAKING MODERN LIVING POSSIBLE
Technical Information
Proportional Valve Group
PVG 32 AG Modules
powersolutions.danfoss.com
Technical Information PVG 32 AG Modules
Revision History Table of Revisions
Date Changed Rev
Feb 2014 Converted to Danfoss layout – DITA CMS AE
Mar 2012 Layout changes, and change in the table, page 21. AD
Mar 2010 New back cover AC
2 11051935 • Rev AE • Feb 2014
Technical Information
PVG 32 AG Modules
Contents
Literature reference for PVG products
Introduction
Short overview...................................................................................................................................................................................5
Hitch control.......................................................................................................................................................................................5
Function
Warning................................................................................................................................................................................................6
PVG 32 cross-sectional view
Technical data
PVG 32 technical parameters....................................................................................................................................................... 8
PVBZ basic module for EH auxiliary valve functions
PVBD, PVBZ with optional diverter feature
Principle description of PVBD diverter:..................................................................................................................................10
PVBZ-HS/HD, hitch control valves
General introduction.................................................................................................................................................................... 11
PVBZ-HS basic module (hitch single-acting)........................................................................................................................11
PVBZ-HD basic module (hitch double-acting).....................................................................................................................12
PVP with integrated HPCO
Modules and code numbers
PVB, inlet basic modules..............................................................................................................................................................15
PVBZ auxiliary modules............................................................................................................................................................... 16
PVBZ-HS/-HD modules, PVBD diverter, multi-valve (for PVBZ-HD)............................................................................. 17
PVBS spools......................................................................................................................................................................................19
PVE.......................................................................................................................................................................................................19
End plates compatible with Metric PVG 32 program........................................................................................................20
Activation characteristics
Characteristic of oil flow, spool travel and voltage............................................................................................................22
Pressure drop characteristics
Pressure drop characteristics of float spools........................................................................................................................23
Single acting spools characteristics for PVBZ-HS .........................................................................................................26
Pressure drop characteristic in lower mode position, max. spool travel..............................................................26
Spools characteristics for PVBZ-HD....................................................................................................................................26
Dimensions and schematic examples
Drawings for 5-section group....................................................................................................................................................29
Drawings for 3-section group....................................................................................................................................................30
Drawings for 2-section group....................................................................................................................................................32
11051935 • Rev AE • Feb 2014 3
Technical Information PVG 32 AG Modules
Literature reference for PVG products
Literature reference
Literature title Type Order
PVG 32 Proportional valve group Technical Information 520L0344
PVG 100 Proportional valve group Technical Information 520L0720
PVG 120 Proportional valve group Technical Information 520L0356
PVG 32 Metric ports Technical Information 11051935
PVE series 4
PVED-CC Electro-hydraulic actuator Technical Information 520L0665
PVED-CX Electro-hydraulic actuator Technical Information 11070179
Basic module for PVBZ Technical Information 520L0721
PVSK module with integrated diverter valve and P-disconnect function Technical Information 520L0556
PVPV / PVPM pump side module Technical Information 520L0222
Combination module PVGI Technical Information 520L0405
PVSP/M Priority module Technical Information 520L0291
Hitch Control
PVBZ Data sheet 520L0681
PVBZ-HS Data sheet 520L0956
PVBZ-HD Data sheet 11035599
MC024-010 and MC024-012 Controllers Data sheet 520L0712
Technical Information
System Description
User Manual
number
520L0553
11036124
11033753
4 11051935 • Rev AE • Feb 2014
V310070.A
PVE
PVBZ-HS
PVP
PVM
PVML
PVC
PVBZ with Diverter
PVBZ-HD
PVBZ
Technical Information
Introduction
Short overview
PVG 32 AG Modules
The PVG 32 valve was originally launched with a range of high-performance electrical actuators in 1988.
During recent years, several AG (agricultural) customer projects have motivated several innovations, and
today our valve program offers components and features as compiled in this Technical Information or
referred to the Literature reference.
Metric ports
We have developed a range of modules with metric ports. These modules comprise of various inlets,
working modules for auxiliary functions, hitch modules, special top mounted modules and endplates.
The range of our PVE - Series 4 is used as actuation.
The target application area for this product range is mainly Agriculture – especially complete EH valve
solutions for tractors, but also other applications can benefit from the offered features.
Besides the inlets suited for fixed as well as for LS-controlled variable piston pumps, you will find a range
of valve modules listed. These valves enable you to assemble a valve solution using EH Aux valves and
hitch valves for tractors.
The PVE Series 4 generation with either analogue and digital pilot heads offers multiple possibilities of
customizing valves for individual needs – ranging from simple analogue versions to fully ISOBUS
compliant actuators with numerous variants in between, analogue as well as digital.
PVG 32 parts description
Hitch control
Together with the introduction of this product range, Danfoss has developed a hitch control SW block
available in our PLUS+1® GUIDE which on base of a PLUS+1 controller can offer a Hitch control system for
tractors.
These components allow for design of hitch systems that incorporate intuitive control as well as a
number of innovative new solutions. The components available offer significant advantages in
controlling both the single and double acting systems, including easy understanding of both Force and
Slip control. In addition to performing state of the art operation of hitch, the software block contains logic
that ensures the full potential of the Danfoss hitch valves are exploited.
The technical information references mentioned describes the Danfoss concept behind the operation of
a hydraulic hitch system, and the different types of systems and components available from Danfoss.
11051935 • Rev AE • Feb 2014 5
W
Technical Information
Function
PVG 32 AG Modules
When main spools (15) are in neutral position, the pilot operated check valves (hereafter PO Check
valves) are kept closed by a spring plus the work port load, which is directed to the spring side of the PO
Check valves (14) via a small orifice.
If a main spool is actuated to have flow out of the B port, the meter out flow forces the respective PO
Check valves valve to open. At the same time, pilot pressure is guided via the main spool to the back side
of a small pilot valve (12) on the A port side. This will ensure that the load pressure behind the PO Check
valves is released to a separate tank T0 (20) via a seat valve and allow the PO Check valves to open and let
return flow pass across the main spool back to tank.
For float function, both PO Check valves are released to tank at the same time as described above.
In some applications with low load pressure, it is necessary to force open the PO Check valves by a pin
(17). This pin is actuated by means of pump pressure on the A port side.
PVBZ modules cannot be optionally mounted (PVM on A - Port side only).
The separate tank connection T0 is needed to ensure proper performance of the PO Check valvess
regardless of the pressure in main tank line T. It is therefore necessary to connect the T0 port in the Inlet
PVP direct to the oil reservoir with a separate hose, see dimensional drawing examples.
All the valve modules in this technical information have a T0 gallery.
Warning
When using PVP with HPCO function (T port can be pressurised) please make sure to lead return flow
from the A and B ports to tank via a separate tank port in the end plate PVST.
Warning
All makes and all types of directional control valves – inclusive proportional valves – can fail and cause
serious damage. It is therefore important to analyse all aspects of the application.
Because the proportional valves are used in many different operation conditions and applications, the
manufacturer of the application is responsible for making the final selection of the products- and
assuring that all performance, safety and warning requirements of the application are met.
The process of choosing the control system – and safety level – could e.g. be governed by ISO 13849
(Safety related parts of control system).
6 11051935 • Rev AE • Feb 2014
LS
13
P
T
A
B
B A
B A
V310138.A
21
3
4+5
6
12
7
11
8
M
A
9
10
15
14
16
B
18
19
17
PVP
PVBZ
PVBZ
PVBZ
20
Technical Information PVG 32 AG Modules
PVG 32 cross-sectional view
1 – Pressure relief valve
2 – Pressure reduction valve for pilot oil supply
3 – Pressure gauge connection
4 – Plug, open center
5 – Orifice, closed center
6 – Pressure adjustment spool
7 – Plug, closed center
8 – LS connection
9 – T0 connection
10 – Plug - to be removed for internal T0*
11 – LS signal
12 – Pilot operated check valves
13 – Shuttle valve
14 – Pilot operated check valves
15 – Main spool
16 – Compensator
17 – Shuttle pin
18 – Max. oil adjustment screws for ports A and B
19 – Pilot oil supply for PVE
20 – Separate tank line (T0)
* for 157B: 5130, 5131, 5330 and 5331 only.
11051935 • Rev AE • Feb 2014 7
Technical Information PVG 32 AG Modules
Technical data
PVG 32 technical parameters
Max. pressure Port P continuous
Port A/B / without P/O checks
Port T, static/dynamic
Port T Hitch Single-Acting Module
Oil flow, rated Port P
Port A/B, with press. comp.
Spool travel, standard
Spool travel,
float position spool
Dead band,
flow control spool
Max. internal leakage
at 200 bar [2900 psi]
and 21 mm2/s [102 SUS]
Oil temperature
(inlet temperature)
Ambient temperature
Oil viscosity Operating range
Filtration
Proportional range
Float position
Standard ± 0.8 mm [±0.03 in]
A/B → T
Recommended
Min. temperature
Max. temperature
Min. viscosity
Max. viscosity
Max. contamination (ISO 4406) 18/16/13 18/16/13
PVBZ with PO Check
valves
PVBZ with PO Check
valves and PVLP
PVB with PVLP
250 bar [3625 psi]
280 bar [4061 psi]
25 / 40 bar [362 / 580 psi]
25 bar [362 psi]
140 l/min [37.0 US gal/min]
100 l/min [26.4 US gal/min]
± 7 mm [±0.28 in]
± 5.5 mm [±0.22 in]
7.5 mm [±0.30 in]
1 cm3/min [0.06 in3/min]
6 cm3/min [0.37 in3/min]
25 cm3/min [1.53 in3/min]
30 → 60°C [86 → 140°F]
-30°C [–22°F]
+90°C [194°F]
-30 → +60°C [–22 → +140°F]
12 - 75 mm2/s [65 - 347 SUS]
4 mm2/s [39 SUS]
460 mm2/s [2128 SUS]
PVBD, 6/2 diverter valve
Max pressure PVBZ module with mounted diverter PVBD, Port A/B
Oil flow max recommended, rated PVBZ module with mounted diverter
PVBD
Multi-valve, Single-action / Double-action
Max pressure PVBZ module with mounted multi valve, Port A/B
Oil flow, rated PVBZ module with mounted multi valve, Port A/B
8 11051935 • Rev AE • Feb 2014
280 bar [4061 psi]
80 l/min [21.1 US gal/min]
280 bar [4061 psi]
100 l/min [26.4 US gal/min]
P301 015
Pilot Valves
PO Check valves Forced Opening Shuttle Pin
Analogue or Digital
CAN ISOBUS
PVE Actuator
Inductive LVDT Sensor PVM Manual Actuator Pressure Compensator with bleed off
A
B
Technical Information PVG 32 AG Modules
PVBZ basic module for EH auxiliary valve functions
The PVBZ valve is a load and pressure compensated valve module with two pilot operated check valves
(PO Check valves) in the A- and B-ports. These are limiting the work port leakage to a very low limit,
below 1 cm3/min.
PVBZ modules will always have 2 PO Check valves one in each work port.
Besides compensation, the pressure compensator can limit the work port pressure blow up to 4 - 5 bar.
The special PVBZ load compensated module was developed for applications that require integrated pilot
operated check valves in the work ports that required to limit the port leakage to zero. See Technical data.
The PVBZ basic module can be mixed with basic modules PVB (with additional tank line T0).
Features:
Integrated pilot operated check valves for limited internal leakage
•
Can be mixed with PVB with T0 gallery
•
LS a/b shuttle for float spools
•
Standard 4/4 float spools
•
Integrated thermo relief valve as option (modules with threaded ports only)
•
Manifold version for Danfoss designed valves or customer designed quick coupler block
•
Compensator with bleed off
•
Auxiliary valve on tractors for function control on implements; cylinder positioning and speed control
•
of hydraulic motors.
PVBZ, load and pressure compensated valve module with two PO check valves in A/B-ports
PVBZ parameters
Maximum pressure Port P continuous 250 bar [3625 psi]
Oil flow, rated Port A/B, with press. comp. 100 l/min [26.4 US gal/min]
Spool travel, standard ± 7 mm [±0.28 in]
Spool travel, float position spool Proportional range ± 5.5 mm [±0.22 in]
Dead band,flow control spool Standard ± 0.8 mm [±0.03 in]
Max. internal leakage at 150 bar [2175
psi] and 21 mm2/s [102 SUS]
Port A/B 280 bar [4061 psi]
Float position 7.5 mm [±0.30 in]
A/B → T 1 cm3/min [0.06 in3/min]
11051935 • Rev AE • Feb 2014 9
PVE
Actuator
Pressure compensator with bleed off
PVM Manual
Actuator
Inductive LVDT Sensor
A
B
Analogue or
Digital CAN
ISOBUS
PVBD (Diverter)
PVC
P301 096
A1 A2 B1 B2
Pilot supply
T0
Pilot Valve
PO Check valve
Technical Information
PVG 32 AG Modules
PVBD, PVBZ with optional diverter feature
The utilization of a PVBZ module can be further enhanced by adding a diverter valve. Mounted on top of
the PVBZ valve slice, a 6/2 PVBD diverter valve can direct valve flow to either of two set of ports (A1/B1 or
A2/B2). The PVBD diverter spool (shift spool) is actuated by the PVC solenoid valve by means of pilot
pressure.
Features:
Enlarge the application range (2 functions)
•
To be mounted on top of PVB or PVBZ modules
•
Pilot operated with PVC
•
Auxiliary valve on tractors for function control on implements: cylinder positioning when the demand
•
on neutral port leakage is limited.
PVBD, PVBZ with optional diverter feature
Principle description of PVBD diverter:
PVC off: The shift spool is held in position (flow to A1/B1) by the spring in the right hand side
•
(opposite the PVC). The spring chamber is always connected to the T0 gallery in the PVBZ body.
PVC on: Pilot pressure is led into the chamber next to the PVC. A limited flow is passing through the
•
shift spool and the two orifices and into the spring chamber connected to T0. Pressure-drop across
the orifices creates the shift force moving the shift spool towards the spring. As a result, port A2/B2
becomes active.
Leakage (along the spool clearance) from pressurized work ports A1/B1 or A2/B2 will always be drained
to T0 either directly in the spring chamber or through the shift spool. This secures safe positioning of the
shift spool as leakage never will build up pressure up in the control chambers.
Safety recommendation: Shift of the diverter should only be possible when the main spool is in neutral.
This has to be ensured through a proper set-up in the controller/MMI hardware.
10 11051935 • Rev AE • Feb 2014
Technical Information
PVG 32 AG Modules
PVBZ-HS/HD, hitch control valves
General introduction
Two types of hitch valves are available for hitch or similar applications. The two valve options offered are
the PVBZ-HS, single acting and the PVBZ-HD, double acting.
The PVBZ-HS matches the market standard whereby implements are raised hydraulically and lowered
only by the pull of gravity. The PVBZ-HD has the unique ability to raise and lower either as single- or
double-acting.
The benefits of the PVBZ-HD reflect a departure from old hitch norms - increased comfort when attaching
implements due to the same speed up and down and safer detachment of heavy implements from the
driver’s seat.
The full benefit of the possibilities with the PVBZ-HD is easily obtained by use of the PLUS+1® hitch core
application block. The core application block shifts the valve between single- and double-acting hitch
according to the most suitable operation.
The operator will not have to select the operation but will notice the benefits during normal operation of
the hitch. Work-modes are single-acting as it is standard today, but manual operation up and down are
double-acting to increase comfort, functionality and safety.
For further info and more details please see the Danfoss Hitch control System description, see Literature
reference.
PVBZ-HS basic module (hitch single-acting)
Single acting PVBZ-HS slice for standard hitch application.
It has its own tank port to direct the return flow directly into the tank with a minimum of back pressure.
This prevents tank-line pressure influence, especially when lowering the un-loaded (empty) hitch under
cold conditions (high oil viscosity).
Similar to the auxiliary slice, the single acting PVBZ-HS slice is a pressure-compensated valve slice with
one P/O check valve on B-port only. The same technology as in the PVBZ module is used.
Besides the flow paths, the spool is directing the pilot pressure to the pilot valve for P/O check valve
pressure release as well as to the shuttle pin in order to force the P/O popped to open under low load
conditions. This ensures a fully open flow path in lower mode.
The B-port is normally equipped with a PVLP shock valve.
PVBZ-HS incorporates a compensator with bleed-off to prevent pressure building up between the pump
gallery and the work ports.
A special 3/3 spool with optimized flow characteristics, both in meter-out as well as in meter-in direction,
has to be controlled by a high performance actuator.
Features:
Low leakage work port
•
Separated tank port
•
Integrated PVLP shock/anti cavitation valves
•
Can be mixed with PVB/ PVBZ with T0 gallery
•
Compensator with bleed off
•
Rear-Hitch on tractors
•
Header control on combines and harvesters
•
11051935 • Rev AE • Feb 2014 11
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