Danfoss PVG 100 User guide
Technical Information
PVG 100
Proportional Valve Group
www.danfoss.com
Technical Information
PVG 100 Proportional Valve Group
Revision history Table of revisions
Date Changed Rev
April 2021 Changed document number from 'BC00000039' to 'BC152886483475' 0606
September 2018 PVB 100 code numbers table change. 0503
May 2018 Minor change. 0502
March 2016 Updated for Engineering Tomorrow design. 0501
February 2006 - January 2014 Various changes BA - EB
February 2005 New Edition AA
2 | © Danfoss | April 2021 BC152886483475en-000606
Technical Information
PVG 100 Proportional Valve Group
Contents
General information
Acronyms.............................................................................................................................................................................................6
General.................................................................................................................................................................................................7
PVG 100 standard oil flow direction/max flow setting..................................................................................................7
PVG 100 valve system................................................................................................................................................................7
General features PVG 100, load independent flow control.........................................................................................7
PVP - pump side module .........................................................................................................................................................8
PVB – basic module.................................................................................................................................................................... 8
Actuation module.......................................................................................................................................................................8
Remote control units ................................................................................................................................................................ 9
Function
PVG 100 with open center PVPF...............................................................................................................................................10
PVG 100 with closed center PVPV / PVPVP / PVPVM.........................................................................................................11
PVG 100 closed center priority steering PVPVP module ........................................................................................... 12
PVG 100 closed center PVPVM module ...........................................................................................................................12
PVG 100 basic modules PVB.......................................................................................................................................................12
PVG 100 tank modules ................................................................................................................................................................13
Load sensing controls...................................................................................................................................................................14
LS control with bleed orifice (do not use with PVG valves).......................................................................................14
Integral PC function.................................................................................................................................................................14
Load sensing system characteristics:.................................................................................................................................14
Remote pressure compensated controls.............................................................................................................................. 15
Remote pressure compensated system characteristics:............................................................................................ 15
PVG 100 main spool with pressure compensated control..............................................................................................15
Pressure compensated system characteristics.............................................................................................................. 16
Typical applications for pressure compensated systems.....................................................................................16
Typical applications for remote pressure compensated systems:..........................................................................16
PVMR, friction detent....................................................................................................................................................................17
PVMF, mechanical float position lock.....................................................................................................................................17
PVBS, main mpools for flow control (standard).................................................................................................................. 17
PVBS, main spools for flow control (with linear characteristic).....................................................................................18
Safety
Building in safety............................................................................................................................................................................19
FMEA (Failure Mode and Effect Analysis) IEC EN 61508............................................................................................. 19
Hazard and risk analysis ISO 12100-1/14121..................................................................................................................19
Example of a control system for manlift................................................................................................................................20
Examples of wiring block diagram.....................................................................................................................................21
Example of fault monitoring.................................................................................................................................................23
PVG 32 – Mainly used in system with fixed displacement pumps..........................................................................24
PVG 100 – Alternative LS dump or pilot supply disconnect..................................................................................... 24
PVG 120 – Pump disconnect/block for variable pumps.............................................................................................24
Technical data
PVG 100 technical data................................................................................................................................................................ 25
PVH, hydraulic actuation.............................................................................................................................................................25
PVG 100 PVM operating force................................................................................................................................................... 26
PVG 100 PVE reaction time and oil consumption.............................................................................................................. 26
PVEO power supply and consumption.............................................................................................................................27
PVEA, PVEH and PVES..............................................................................................................................................................27
Technical characteristics
PVPF, pump side module............................................................................................................................................................28
Open center flow rating.............................................................................................................................................................. 28
Closed center flow rating............................................................................................................................................................28
PVG 100 pressure drop for PVB, basic module....................................................................................................................29
PVB with pressure compensation, closed center PVP...................................................................................................... 30
PVHC characteristic - Spool stroke vs current......................................................................................................................33
Hydraulic systems
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Technical Information
PVG 100 Proportional Valve Group
Contents
PVG 100 with variable displacement pump schematic example................................................................................. 34
Electrically actuated PVG 100, variable displacement pump, PVB 100 with integrated pilot operated
check valves............................................................................................................................................................................. 34
Electrically actuated PVG 100/32, fixed displ. pump, PVB 100/32 with integrated pilot operated
check valves............................................................................................................................................................................. 35
Other operating conditions
Oil.........................................................................................................................................................................................................36
Mineral oil....................................................................................................................................................................................36
Non-flammable fluids............................................................................................................................................................. 36
Biodegradable oils....................................................................................................................................................................36
Particle Content, Degree of Contamination.........................................................................................................................36
Filtration............................................................................................................................................................................................ 36
Mounting
Standard mounting vs. option mounting.............................................................................................................................38
Modules and code numbers
PVPF (Open Center) Inlet Modules - for Pumps with Fixed Displacement .............................................................. 39
PVPF Accessories for Pump Side Modules............................................................................................................................39
PVP (Open and Closed) Accessories for Pump Side Modules........................................................................................40
PVPV (Closed Center) Inlet Modules....................................................................................................................................... 40
PVPVP, Closed Center Priority Side Modules - for Pumps with Variable Displacement.......................................41
PVPVM, Closed Center Mid Inlet Modules - for Pumps with Variable Displacement............................................ 41
PVB 100 Basic Modules (Standard Spools)............................................................................................................................42
PVB 100 Basic Modules (Exposed spools)..............................................................................................................................42
PVB 100 Basic Modules (High Flow Spools)..........................................................................................................................43
PVG 100 PVM code numbers..................................................................................................................................................... 43
PVM / PVH, Covers......................................................................................................................................................................... 43
PVEO, ON/OFF Actuation............................................................................................................................................................ 44
PVHC - main spool control.................................................................................................................................................... 44
PVEA/PVEH/PVES, Proportional Actuation............................................................................................................................44
PVLA, Anti-Cavitation Valve Fitted into PVB.........................................................................................................................45
PVLP, Shock / Anti-Cavitation Valve Fitted into PVB......................................................................................................... 46
PVT 100, Tank Module..................................................................................................................................................................46
PVTI 100/32, Interface Module*................................................................................................................................................ 47
PVG 100 PVSI / PVT, Assembly Kit.............................................................................................................................................47
PVBE (End Bodies), Assembly Kit.............................................................................................................................................. 47
PVG 100 / PVTI, Interface Module Assembly Kit..................................................................................................................47
PVB 32, Assembly Kit.....................................................................................................................................................................47
PVG 32 Basic Modules with T0, PVBZ (Compatible with PVG 100)...............................................................................48
PVG 32 Basic Modules with T0, PVB (Compatible with PVG 100)................................................................................. 49
Standard Spools for Electrical and Mechanical Actuation Progressive Flow Characteristics.............................50
Standard Spools for Hydraulic Actuation Progressive Flow Characteristics.............................................................50
Spools for Friction Detent, PVMR (not compatible with PVBZ 100) Progressive Flow Characteristics...........51
Spools for Mechanical Float position, PVMF (not compatible with PVBZ 100) Progressive Flow
Characteristics......................................................................................................................................................................... 51
Standard Spools (Electrical and Mechanical Actuation) Linear Flow Characteristics............................................51
Standard Spools (Electrical and Mechanical Actuation) Throttled Open in Neutral, Linear Flow
Characteristics......................................................................................................................................................................... 52
Standard Spools (Hydraulic and Mechanical Actuation), Throttled Open in Neutral, Linear Flow
Characteristics......................................................................................................................................................................... 52
Standard Spools (Electrical and Mechanical Actuation), Full Open in Neutral; Progressive Flow
Characteristics ........................................................................................................................................................................ 52
Standard Spools (Hydraulic and Mechanical Actuation), Full Open in neutral; Linear Flow
Characteristics ........................................................................................................................................................................ 52
High Flow Spools (Electrical and Mechanical Actuation) Progressive Flow Characteristics...............................53
High Flow Spools (Hydraulic and Mechanical Actuation) Progressive Flow Characteristics..............................53
High Flow Spools, Full Open A/B → T and Neutral; Progressive Flow Characteristics ........................................ 54
Exposed spools Progressive Flow Characteristics..............................................................................................................54
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Technical Information
PVG 100 Proportional Valve Group
Contents
Dimensions
PVG 100 dimensions in general................................................................................................................................................55
PVG 100 with open center PVPF dimensions.......................................................................................................................56
PVG 100/32, closed center PVPV.............................................................................................................................................. 57
PVG 100, Closed Center PVP with Integrated Priority Valve ..........................................................................................58
Examples........................................................................................................................................................................................... 59
Module selection chart
Exploded view for module selection ..................................................................................................................................... 64
PVG 100 order specification
Please state.......................................................................................................................................................................................69
Standard and option assembly.................................................................................................................................................69
Reordering........................................................................................................................................................................................70
Specification sheet
Specification form..........................................................................................................................................................................71
Specification example for PVPVM............................................................................................................................................72
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Technical Information
PVG 100 Proportional Valve Group
General information
Acronyms
This table provides a definition of some commonly used terms
PVG = Proportional Valve Group
PVAS Assembly (Tie Rod) Kit
PVB Basic Module (Body)
PVBE Basic End Module (Body)
PVBO Basic Open Ended Module (Body)
PVBS Main Spool for PVB
PVBSO Main Spool for PVBO
PVBZ Basic Module (Body) Zero Leak
PVE Electrical Actuator
PVEA Electrical Actuator-Fine Proportional
PVED Electrical Actuator-Digital
PVEH Electrical Actuator-High Proportional
PVEO Electrical Actuator-ON/OFF
PVES Electrical Actuator-Super Proportional
PVH Cover for Hydraulic Actuation
PVHC Electrical Actuator-High Current
PVLA Anti-Cavitation Valve
PVLP Shock Valve
PVM Mechanical Actuator
PVMD Cover for Mechanical Activation
PVMF Cover for Mechanical Float
PVMR Cover for Friction Detent
PVP Pump Side Module (Inlet)
PVPC Plug for external pilot oil supply
PVPD Open Center PVPF Dummy Spool
PVPE Electrical Unloading Valve for PVPF
PVPF Open Center PVP
PVPH Hydraulic Unloading Valve for PVPF
PVPP Electrical Pilot Shut-Off Valve
PVPV Closed Center PVP
PVPV/M Pump side module
PVPVP Closed Center PVP w/Priority
PVPX, LS LS Unloading valve
PVT Tank Side Module
PVTI Interface Module
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PVEH/PVES
PVEA
PVEO
PVH
PVMD
PVMR/PVMF
PVP
PVM
PVB
PVT
B
A
P-A
P-B
7-9 N•m
[61-79 lbf•in]
Q max: P B
Q max: P A
Technical Information
PVG 100 Proportional Valve Group
General information
General
PVG 100 standard oil flow direction/max flow setting
Adjustment screws are used to change the amount of oil flowing from ports P to B or P to A.
PVM to the right of PVP
PVG 100 valve system
PVG 100 is a hydraulic load sensing valve, designed to fulfill efficiency requirements.
From a simple load sensing directional valve to an advanced electrohydraulic controlled load
independent proportional valve the PVG 100 modular system makes it possible to build up a valve group
to fulfill customer requirements. The compact external dimensions of the valve remain unchanged
whatever combination is specified.
General features PVG 100, load independent flow control
Flow sharing for maximum controllability and safety
•
Load-independent flow control for precise operation and improved productivity
•
Oil flow to an individual function is independent of the load pressure of this function regardless of
‒
sufficient or insufficient pump flow.
Oil flow to one function is independent of the load pressure of other functions regardless of
‒
sufficient or insufficient pump flow.
Load-sensing technology for higher efficiency, safety, reduced energy consumption, and longer
•
system lifetime
Configurable as an advanced electrical, hydraulic or mechanically operated proportional load-sensing
•
valve
Open spool-ends for system integrating mechanical cable or linkage actuation
•
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Technical Information
PVG 100 Proportional Valve Group
General information
Modular design providing a wide range of configuration possibilities
•
Up to eight different sections per valve group (maximum flow per section: 240 l/min [63.4 gal/min])
•
Can be configured in combination with PVG 32 (with T0) for maximum flexibility (up to 20 basic valve
•
modules per valve group)
Optimized return flow characteristics, which minimizes pressure loss
•
Low weight
•
Compact design and installation
•
BSP and UNF connection threads
•
PVP - pump side module
Build in load sense relief valve
•
System pressure up to 350 bar (5075 psi)
•
Full Flow dump valve (open center only)
•
Pilot supply shut off (optional) ••Accumulator gauge connection
•
Pressure gauge connection
•
Pilot gauge connection
•
Integrated pilot supply valve
•
Versions:
•
Open center version for systems with fixed displacement pumps
‒
Closed center versions for systems with variable displacement pump
‒
Integrated priority valve for dynamic steering integration
‒
PVB – basic module
Integrated pilot operated check valves in A and B work ports for low internal leakage
•
Integrated pressure compensator
•
Interchangeable spools
•
Single and Dual Shock/suction valves for A and B ports
•
Different interchangeable spool variants
•
All versions suitable for mechanical, hydraulic and electrical actuation
•
Versions:
•
PVG100-HF (High Flow) version for less total pressure loss at increased flow
‒
End module version for extra space savings
‒
Open spool-end version for extended mechanical actuation possibilities
‒
Actuation module
The basic module is always fitted with mechanical actuator PVM, which can be combined with the
following as required:
Electrical actuator (11 – 32 V
•
PVES – proportional, Super
‒
PVEH – proportional, high performance
‒
PVEH-F – proportional high performance, Float
‒
PVEA – proportional low hysteresis (not recommended for PVG 100-HF High Flow)
‒
PVEM – proportional, medium performance
‒
PVEO – ON/OFF
‒
PVEU – proportional, voltage control, 0-10 V
‒
AC/DC
):
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PVRE, electrical control unit, 162F…
Prof 1, 162F…
PVREL, electrical control unit, 155U…
PVRES, electrical control unit, 155B…
PVRH, hydraulic control unit, 155N…
155N0003 155N0001 155N0004 155N0005 155N0002
Technical Information
PVG 100 Proportional Valve Group
General information
PVED-CC – Digital CAN controlled J1939/ISOBUS
‒
PVED-CX – Digital CAN controlled CAN open extra vehicle system safety
‒
PVEP – PVM controlled (11-32 V)
‒
PVHC – High Current actuator for PVG
‒
PVMD, cover for Mechanical actuation
•
PVMR, cover for Mechanical detent (not compatible with PO check modules)
•
PVMF, cover for Mechanical Float (not compatible with PO check modules)
•
PVH, cover for Hydraulic actuation.
•
Remote control units
Electrical remote control units:
•
‒
PVRE, PVRET
‒
PVREL
‒
PVRES
‒
Prof 1
‒
Prof 1 CIP
‒
JS120
Hydraulic remote control unit: PVRHH
•
Electrical and hydraulic remote control units
‒
JS1000 Ball grip
‒
JS1000 PRO grip
‒
JS2000
‒
JS6000
‒
JS7000
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Technical Information
PVG 100 Proportional Valve Group
Function
PVG 100 with open center PVPF
When the pump is started and the main spools in the individual basic modules are in the neutral position,
oil flows from the pump, through connection P, across the pressure matching spool (11) to tank. The oil
flow led across the pressure matching spool determines the pump pressure (stand-by pressure).
When one or more of the main spools are actuated, the highest load pressure is fed through the shuttle
valve circuit (4, 7) to the spring chamber (10) behind the pressure matching spool, and completely or
partially closes the connection to tank. Pump pressure is applied to the opposite side of the pressure
matching spool. The pressure relief valve (1) will open should the load pressure exceed the set value,
diverting pump flow back to tank.
Optional PVPC with check valve option may be used in systems where it is necessary to operate the PVG
100 valve by means of the electrical remote control without pump flow.
For additional information about PVPC refer to the publication BC152886483664.
Optional electrically actuated pilot shut off valve PVPP provides additional functional system safety by
removing pilot oil from the electrical actuation or hydraulic actuation system, disabling main spool
actuation. When the PVPP is used with the PVBZ P.O. check valve system it is possible to disable actuation
during mechanical actuation
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B A
B A
B
9
8
7
6
3
5
4
T T
P
T T
P
1
10
12
11
2
T
P
P
Port
PVPD / PVPE
Facility
Pilot
Supply
Pressure Matching
Spool
Technical Information
PVG 100 Proportional Valve Group
Function
PVG 100 sectional view PVP with open center
1 – LS relief valve 7 – Shock and suction valve, PVLP
2 – Shuttle valve 8 – Main spool, PVBS
3 – Pilot operated check valve, POC 9 – Max. oil flow adjustment screws for ports A and B
4 – LS line 10 – Spring 12 or 20 bar
5 – Logic cartridge for POC 11 – Pressure matching spool
6 – Pressure compensator 12 – Orifice
PVG 100 with closed center PVPV / PVPVP / PVPVM
In load sensing systems the load pressure is led to the pump control via the LS connection (2 in the
diagram below). When the work functions are in the spring neutral position the LS pressure is drained to
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Technical Information
PVG 100 Proportional Valve Group
Function
tank via the PVG valve. In this condition the pump control sets the displacement so that leakage in the
system is compensated for, to maintain the set stand-by pressure (pump margin). When a main spool is
actuated the pump control will adjust the displacement so that the set differential pressure between P
and LS is maintained.
The PVG100 Inlet LS relief valve (1) is specifically designed to ensure a constant margin pressure across
the main spool, providing demanded regulated flow during maximum load pressure conditions. This
relief adjustment is critical when there are two or more functions being operated together. An incorrectly
adjusted Inlet relief could result in a vast reduction in regulated flow from the adjacent functions that
operate at a lower load pressure. To accurately adjust the inlet LS relief, the pump standby pressure must
be known in addition to the maximum operating load pressure.
Example
Pressure comp pressure level 172 bar [2500 psi]
LS standby pressure requirement that delivers the desired flow -20 bar [-290 psi]
Maximum load pressure requirement 152 bar [2210 psi]
Inlet relief pressure setting 152 bar [2210 psi]
Optional PVPC with check valve option may be used in systems where it is necessary to operate the PVG
100 valve by means of the electrical remote control without pump flow.
For additional information about PVPC refer to publication BC152886483664.
Optional electrically actuated pilot shut off valve PVPP provides additional functional system safety by
removing pilot oil from the electrical actuation or hydraulic actuation system, disabling main spool
actuation. When the PVPP is used with the PVBZ P.O. check valve system it is possible to disable actuation
during mechanical actuation.
PVG 100 basic modules PVB
PVG 100 closed center priority steering PVPVP module
The priority steering version of the PVPV will accommodate pump flows up to 250 l/min [66 US gal/min]
and Control Flow (CF) up to 60 l/min [16 US gal/min] for dynamic steering systems. Additional return port
is included with the PVPVP module.
PVG 100 closed center PVPVM module
The mid-inlet version of the PVPV will accommodate pump flows up to 400 l/min [106 US gal/min]
providing greater efficiency and flexibility when combined with standard and high flow work function
modules.
In the pressure-compensated basic module the compensator (9) maintains a constant pressure drop
across the main spool (11) - both when the load changes and when a module with a higher load pressure
is actuated.
Besides independent flow the other advantage of post-compensated work sections is the ability to
control multifunction operation when flow demand exceeds pump capacity. This means that all work
sections will continue to function regardless of differences in their load and regardless of the pump flow.
The flow relationships specified between functions will be maintained over the full flow range of the
pump.
The shock valves PVLP (10) with fixed setting and the suction valves PVLA on ports A and B are used for
the protection of the individual working function against intermittent pressure overload and/or
cavitation. Optional facilities for dual shock valves for ports A and B provide extra passage area reducing
pressure drop for anti-cavitation applications.
Pilot operated check valve system PVBZ option (6, 8) on ports A and B are uses to reduce the work port to
tank leakage eliminating the need for external actuator load holding in non-critical load holding
applications. All PVG 100 modules contain an integrated T0 drain system to insure optimal performance
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Technical Information
PVG 100 Proportional Valve Group
Function
for PVBZ and all electrical actuation offerings. T0 is most effective when connected directly to the
hydraulic system reservoir independent of the main Tank return system.
PVG 100 tank modules
Designed for low pressure drop at high return flows all PVT modules include facilities for PVLP shock
valves insuring pressure passage spike protection during pump starvation recovery.
1 – LS relief valve 8 – Logic cartridge for POC
2 – LS connection 9 – Pressure compensator
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0
0
P101 968E
PC setting
Flow
Pressure
Q max
P101 967
Technical Information
PVG 100 Proportional Valve Group
Function
3 – Priority spool for CF 10 – Shock and suction valve, PVLP
4 – LS connection for steering unit 11 – Main spool, PVBS
5 – Shuttle valve 12 – Max. oil flow adjustment screws for ports A and B
6 –Pilot operated check valve, POC 13 – LS comp (LS signal sent back to compensators)
7 – LS line
Load sensing controls
The LS control matches system requirements for both pressure and flow in the circuit regardless of the
working pressure. Used with a closed center control valve, the pump remains in low-pressure standby
mode with zero flow until the valve is opened. The LS setting determines standby pressure.
Typical operating curve
Load sensing circuit
Most load sensing systems use parallel, closed center, control valves with special porting that allows the
highest work function pressure (LS signal) to feed back to the LS control.
Margin pressure is the difference between system pressure and the LS signal pressure. The LS control
monitors margin pressure to read system demand. A drop in margin pressure means the system needs
more flow. A rise in margin pressure tells the LS control to decrease flow.
LS control with bleed orifice (do not use with PVG valves)
The load sense signal line requires a bleed orifice to prevent high-pressure lockup of the pump control.
Most load-sensing control valves include this orifice. An optional internal bleed orifice is available, for use
with control valves that do not internally bleed the LS signal to tank.
Integral PC function
The LS control also performs as a PC control, decreasing pump flow when system pressure reaches the PC
setting. The pressure compensating function has priority over the load sensing function.
For additional system protection, install a relief valve in the pump outlet line.
Load sensing system characteristics:
Variable pressure and flow
•
Low pressure standby mode when flow is not needed
•
System flow adjusted to meet system requirements
•
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0
0
Q max
Pressure
Fl
ow
P101 969E
PC setting
Remote PC setting
P101 966
Technical Information
PVG 100 Proportional Valve Group
Function
Lower torque requirements during engine start-up
•
Single pump can supply flow and regulate pressure for multiple circuits
•
Quick response to system flow and pressure requirements
•
Remote pressure compensated controls
The remote PC control is a two-stage control that allows multiple PC settings. Remote PC controls are
commonly used in applications requiring low and high pressure PC operation.
Typical operating curve
Closed center circuit with remote PC
The remote PC control uses a pilot line connected to an external hydraulic valve. The external valve
changes pressure in the pilot line, causing the PC control to operate at a lower pressure. When the pilot
line is vented to reservoir, the pump maintains pressure at the load sense setting.
When pilot flow is blocked, the pump maintains pressure at the PC setting. An on-off solenoid valve can
be used in the pilot line to create a low-pressure standby mode. A proportional solenoid valve, coupled
with a microprocessor control, can produce an infinite range of operating pressures between the low
pressure standby setting and the PC setting.
Size the external valve and plumbing for a pilot flow of 3.8 l/min [1 US gal/min]. For additional system
protection, install a relief valve in the pump outlet line.
Remote pressure compensated system characteristics:
Constant pressure and variable flow
•
High or low pressure standby mode when flow is not needed
•
System flow adjusts to meet system requirements
•
Single pump can provide flow to multiple work functions
•
Quick response to system flow and pressure requirements
•
PVG 100 main spool with pressure compensated control
The PC control maintains constant system pressure in the hydraulic circuit by varying the output flow of
the pump. Used with a closed center control valve, the pump remains in high pressure standby mode at
the PC setting with zero flow until the function is actuated.
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0
0
Q max
Pressure
Fl
ow
P101 166E
PC setting
P101 965
Technical Information
PVG 100 Proportional Valve Group
Function
Typical operating curve
Once the closed center valve is opened, the PC control senses the immediate drop in system pressure
and increases pump flow by increasing the swashplate angle.
The pump continues to increase flow until system pressure reaches the PC setting. If system pressure
exceeds the PC setting, the PC control reduces the swashplate angle to maintain system pressure by
reducing flow.
The PC control continues to monitor system pressure and changes swashplate angle to match the output
flow with the work function pressure requirements.
If the demand for flow exceeds the capacity of the pump, the PC control directs the pump to maximum
displacement. In this condition, actual system pressure depends on the actuator load.
Simple closed-center circuit
For additional system protection, install a relief valve in the pump outlet line. * Do not use the PVG 32
with bleed down load sense control.
Pressure compensated system characteristics
Constant pressure and variable flow
•
High pressure standby mode when flow is not needed
•
System flow adjusts to meet system requirements
•
Single pump can provide flow to multiple work functions
•
Quick response to system flow and pressure requirements
•
Typical applications for pressure compensated systems
Constant force cylinders (bailers, compactors, refuse trucks)
•
On/off fan drives
•
Drill rigs
•
Sweepers
•
Trenchers
•
Typical applications for remote pressure compensated systems:
Modulating fan drives
•
Anti-stall control with engine speed feedback
•
Front wheel assist
•
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Technical Information
PVG 100 Proportional Valve Group
Function
Road rollers
•
Combine harvesters
•
Wood chippers
•
PVMR, friction detent
The friction detent PVMR allows the directional spool to be held in any position, resulting in infinitely
variable, reversible, pressure compensated flow.
This can be sustained indefinitely without having to continue to hold the mechanical lever. Friction
detent spool position may be affected by high differential actuator flow forces and system vibration
resulting in work function flow reduction.
PVMR, friction detent
PVMF, mechanical float position lock
Allows the float spool to be held in the float position after release of the mechanical handle.
PVMF, standard mount only
P → A → F (Push-in)
PVBS, main mpools for flow control (standard)
With post-compensated valves, the A and B work port flow will depend on the pressure drop across the
main spool PVBS.
In open center systems, this pressure drop (standby-pressure) is determined by the volume of fixed pump
flow led to tank across the pressure adjusting spool in the inlet PVPF and the pressure adjusting spool
PVMF, optional mount only
P → A → F (Pull-out)
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Technical Information
PVG 100 Proportional Valve Group
Function
bias spring pressure. Since the pressure drop varies with pump flow volume led to tank, the A and B work
port flow will vary.
In closed center systems, the pressure drop across the main spool equals the standby setting of the
pump, measured at the P-port of the valve. The A and B work port flow will remain unchanged as long as
the standby is unchanged.
PVBS, main spools for flow control (with linear characteristic)
PVBS main spools with linear characteristic deliver a higher flow gain directly proportional to the linear
spool travel beyond the dead band.
18 | © Danfoss | April 2021 BC152886483475en-000606
W
Technical Information
PVG 100 Proportional Valve Group
Safety
Building in safety
All makes and all types of control valves (including proportional valves) can fail. Thus the necessary
protection against the serious consequences of function failure should always be built into the system.
For each application an assessment should be made for the consequences of pressure failure and
uncontrolled or blocked movements.
To determine the degree of protection that is required to be built into the application, system tools such
an FMEA (Failure Mode and Effect Analysis) and Hazard and Risk Analysis can be used.
FMEA (Failure Mode and Effect Analysis) IEC EN 61508
FMEA is a tool used for analyzing potential risks. This analytical technique is utilized to define, identify,
and prioritize the elimination or reduction of known and/or potential failures from a given system before
it is released for production.
Please refer to IEC FMEA Standard 61508.
Hazard and risk analysis ISO 12100-1/14121
This analysis is a tool used in new applications as it will indicate whether there are special safety
considerations to be meet according to the machine directives EN 13849.
Dependent on the determined levels conformety this analysis will determine if any extra requirements
for the product design, development process, production process or maintenance, i.e. the complete
product life cycle.
Warning
All makes/brands and types of directional control valves – inclusive proportional valves – can fail and
cause serious damage. It is therefore important to analyze all aspects of the application.
Because the proportional valves are used in many different operation conditions and applications, the
manufacturer of the application is alone 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 levels – is governed by the machine directives
EN 13849 (Safety related requirements for control systems).
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Technical Information
PVG 100 Proportional Valve Group
Safety
Example of a control system for manlift
Example of a control system for man-lift
Example of a control system for man-lift using PVE Fault monitoring input signals and signals from
external sensors to ensure the PLUS+1® main controllers correct function of the man-lift.
Typical PVE wiring block diagram
Warning
It is the responsibility of the equipment manufacturer that the control system incorporated in the
machine is declared as being in conformity with the relevant machine directives.
20 | © Danfoss | April 2021 BC152886483475en-000606
Fault detection output
high=on
low=off
Alarm
logic
2)
Memory3)
E1
E2
Output
AND
OR
U
DC2
Error
U
S
Neutral detection / Supply control
signal
≠
neutral
OFF
Delay
1)
U
DC2
Error
U
S
PVEH
with AMP
connector
PVEH
with AMP
connector
Hydraulic
deactivation
Neutral detection / Supply control
signal
≠
neutral
OFF
Delay
1)
PVE 1
PVE 2
Emergency
stop
Man present
switch
C
C
D
B
B
A
P301 318
Technical Information
PVG 100 Proportional Valve Group
Safety
PVG 32 – used in system with fixed displacement pumps:
•
PVSK, commonly used in crane application - full flow dump
•
PVPX, LS dump to tank
PVG 100 – alternative LS dump/pilot supply disconnect:
•
PVPP, pilot oil supply shut off
•
External cartridge valve connecting LS pressure or main pressure to tank
PVG 120 – pump disconnect/block for variable pumps:
•
PVPE, full flow dump for the PVG 120
•
External cartridge valve connecting LS pressure to tank
Examples of wiring block diagram
Example 1
Typical wiring block diagram using PVEH with neutral power off switch and fault monitoring output for
hydraulic deactivation.
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Neutral detection / Supply control
signal
≠
neutral
OFF
Delay
1)
Fault detection output
PVEH-DI
AMP supply
connector
PVEH-DI
AMP supply
connector
PVEH-DI
AMP connector
PVEH-DI
AMP connector
AND
high=on
low=off
Neutral detection / Supply control
signal
≠
neutral
OFF
Delay
1)
PVE 1
PVE 2
Fault detection
Delay
DI
Logic
Memory
U
S
DI-A
DI-B
2)
4)
3)
Output
Fault detection
Delay
DI
Logic
Memory
U
S
DI-A
DI-B
2)
4)
3)
Output
OR
Emergency
Stop
Man present
switch
P301 319
U
DC2
Error
U
S
DI-B
Error
DI-A
U
DC2
Error
U
S
Error
DI-A
Hydraulic
deactivation
W
Technical Information
PVG 100 Proportional Valve Group
Safety
A Emergency stop / man present switch
B PVE Fault monitoring signals
C Neutral signal detection
D Deactivation of the hydraulic system (System Control Logic, example: PLUS+1® for signal monitoring
and triggering signal)
Warning
It is the responsibility of the equipment manufacturer that the control system incorporated in the
machine is declared as being in conformity with the relevant machine directives.
Example 2
Fault monitoring for deactivation of the hydraulic system with extra fault inputs using the PVE’s with DI
(Direction Indication) function. System Control Logic, example PLUS+1® for signal monitoring and
triggering signal for deactivation of the hydraulic system.
Warning
It is the responsibility of the equipment manufacturer that the control system incorporated in the
machine is declared as being in conformity with the relevant machine directives.
22 | © Danfoss | April 2021 BC152886483475en-000606
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