Parker Pv Series

7/22/2019 Parker Pv Series

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Variable displacementaxial piston pump

Bulletin HY30-3250-INST/UK

Installation andstart-up information

PV seriesDesign series40, PVplus

Effective: November 15, 2006


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2 Parker HannifinPump ands Motor DivisionChemnitz, Germany

Axial Piston PumpSeries PV, series 40


Installation Manual

Note: The compensator ordering code is represented by the last three digits of the pump ordering code(digit 13 to 15).

Note

This document and other information from Parker Hannifin GmbH, its sub-

sidiaries, sales offices and authorized distributors provide product or systemoptions for further investigation by users having technical expertise. Beforeyou select or use any product or system it is important that you analyseall aspects of your application and review the information concerning theproduct or system in the current product catalogue. Due to the variety ofoperating conditions and applications for these products or systems, theuser, through his own analysis and testing, is solely responsible for makingthe final selection of the products and systems and assuring that all perform-ance and safety requirements of the application are met. The products aresubject to change by Parker Hannifin GmbH at any time without notice.

Contnets Page

1 Installation and start-up 3

2 Displacement adjustment 6

3 Standard pressure compensator, code ...F*S 6

4. Remote pressure compensator, code FRC 7

5. Remote pressure compensator, codes FR1, FRZ 8

6. Load sensing compensator, code FFC 9

7. Load sensing compensator, codes FF1, FRZ 10

8. Two-spool load sensing compensator, codes FT1, FTZ 11

9. Horse power compensator, codes *L*, *C* 12

9.1 Horse power compensator, ordering codes *LA resp. *CA 13

9.2 Horse power compensator, ordering codes *LB resp. *CB 13

9.3 Horse power compensator, ordering codes *LC resp. *CC 13

10. Proportional displacement control, code FPV 14

11. Electrohydraulic p/Q control, codes FPR, FPZ 15

12. Compensator accessories 16

12.1 Pressure relief pilot valve, code PVAC1P* 16

12.2 Multiple pressure pilots PVAC1E*, PVAC2P*, PVAC2E* aund PVAC2M* 17

13. Trouble shooting guide 18


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Installation Manual

Flushing port

The PV pumps of design series 40 (PVplus) are equippedwith a flushing port. This port is smaller in diameter thanthe drain port(s) and is located opposite to these portsin the bottom of the pump case. The flushing flow can -depending on the actual working conditions - be used tokeep the pump case filled, to warm up the pump (duringcold temperature operation) or for a better heat dissipa-tion. Permanent dead head operation (>15min) either forpumps of frame size 3 and larger (PV063 and higher)or at high input speeds above 1,800rpm as well as highenvironmetntal temperatures flushing are recommended.Also dead head operation with HFC fluids (water glycole)requires flushing of the pump case, to avoid high fluidtemperatures.

The flushing flow depends on the frame sizeof the pump:

Frame size 1 4 to 6 l/min





The flushing flow should be taken from the return flow ofthe separate cooling and filter circuit. Preload at 1 to 2bar, consider orifice cor responding to preload pressureand recommended flushing flow.

Drive input

For direct drive use elastic coupling free of axial and ra-dial reaction forces. Please follow strictly the instructionsof the coupling supplier regarding axial clearance, axialdisplacement and angular tolerances. Couplings nevershall be mounted using a hammer. Threads in the shaftend allow smooth mounting of the coupling.

The drive shaft should only carry true torque. ContactParker for allowable side loads or axial forces.

PV pumps are normally for one direction of rotation only.Therefore check rotation of drive motor prior to installa-tion.

Port positions for PV (shown for clockwise rotation, for ccw rotation ports are mirrored)

Interface forcompensator

Alternative drain port

Drain port

Pressure port(outlet)

Suctionport (inlet)

Gage port

Flushing port, coveredbelow pump


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Installation Manual

Electrical interfaceCheck voltage, current, phase and connection properties.Verify direction of motor rotation.

Fluid reservoir

The reservoir needs to meet all system requirementsconcerning design, size, location and porting. Besidebeeing reservoir for the hydraulic fluid, the tank also sup-ports heat dissipation, air removal, water removal andcontamination sedimentation. Often the reservoir also isthe fundament for the motor pump unit. In this case theseparation of pump and remaining structure by elasticmeans is mandatory to avoid noise and vibration beinginduced into the frame work. The reservoir needs to becarefully sealed against ingression of contamination andwater. A level indicator and thermometer should be placedin an easily accessible location.

Fluid content (general rule): stationary systems 3 to 4

times pump nominal flow, 1 times or even smaller inmobile systems.

Filling of the systemUse only high quality mineral oil based fluids, like HLPoils according to DIN 51524 part 2. For other fluids (HFC,HFD, bio degradable or synthetic fluids) please contactParker and review the Hydraulic Fluids Information inCatalogue 2500/UK.Operation viscosity should be 16 to 100mm/s, optimumviscosity range is in the 20 to 40mm/s, max. viscosity forshort time up to 320mm/s.Because of the possibly uncompatible ingredients fluids

should not be mixed (separation of fluid, reduction or lossof fluid properties).

Pay highest attention on cleanliness!Fill system only via a filtration device. Use filtration unit,when basic contamination of the refill fluid exceeds class10 according NAS 1638 (contamination level 18/16/13according to ISO 4406). Hydraulic fluid supplied in barrelstypically exceeds these contamination levels.

FiltrationFiltration is the most important factor to the opera-tionallife of the hydraulic system. Statistical analy-ses indicate,

that contamination is by far the most important reason forsystem or component failure.Use return line, pressure and/or bypass filtration. Bypassfiltration usually is most efficient. For general purpose hy-draulic systems with limited requirements for operationallife contamination level 20/18/15 according to ISO 4406should be desired; corresponding filter rating: x = 25m (b

2575 ) according to ISO 4572.

Cleanliness level for systems with higher re-quirements foroperational life and functional safety should be 18/16/13according to ISO 4406; corresponding filter rating x =10m ( b

1075 ) according to ISO 4572.

Use filter with indicator or electrical signal when capacity

limit is approached.

Suction filter should be avoided. Suction conditions will beaffected. Filter can be blocked and cause cavitation andsevere pump damage. When used, a vacuum sensor withshut off function is mandatory.

Properly dimensioned breather rating 10m should be

used. Observe min. and max. fluid level; consider ex-change volume with cylinders in the system.

Filling of pump case

Pump case must be filled via the drain port, to ensurelubrication, sealing and smooth start up.

Start up

Check if all ports are properly connected according to thespecification, all connectors are tightened and all adjust-ments are made.

Open suction valve!

Switch system to free circulation or to lowest pressure.Allow air bleeding for quick priming. Start pump in tipmode operation until pump and all pipes are filled andfree from air bubbles.

If pump does not build up pressure double check theinstallation.

Raise pressure setting only when all air is removed.

Let the pump work at reduced pressure for 5 - 10 min,check if all pipes and connections are leak free andtight.

Observe reservoir: fluid level, built up of foam, fluid tem-perature. When system is warmed up first functional testscan be performed.

Note

All pumps are tested and adjusted after assembly in ourfactory.

If no specific pre-setting is required on the order only thecompensating pressure needs to be adjusted. Dependingon the compensator option this might be done on a pilotvalve only. In this case no adjustments on the compensa-tor or the pump is required. Only after service or repair abasic adjustment needs to be performed.


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Installation Manual

2. Displacement adjustment

All axial piston pumps of the PV series are equipped withan adjustable displacement limiter.

The servo piston stroke is limited at full displacement bya screw, guided in the end cover plug of the servo piston

bore. The screw is protected against unintentional adjust-ment by a self-sealing lock nut.

The factory setting of the displacement is according to thenominal displacement of the pump. An adjustment mayonly be made to a lower displacement (turning screw in).An adjustment to a higher than the nominal displacementcan destroy the pump.

Adjustment should only be made with the pump working atfull displacement (not compensated) and at a low output.At full displacement the piston area of the servo piston isunder case pressure. Opening the self-sealing nut will onlycause a negligible leakage under these conditions.

Turning the adjustment screw clockwise will reduce thepumps displacement. For the sizes PV016 PV092 thethread pitch is 1mm, for sizes PV140 PV270 the threadpitch is 1.5mm. The following table shows the displace-ment change per mm resp. per turn and the minimumadjustable displacement:

3. Standard pressure compensator, code ...F*S

The adjustment of the compensating pressure is per-formed for the standard pressure compensator directlyat the compensator.

To adjust the pressure, the lock nut (SW 19) is to beloosened and the adjustment spindle is to be turned. Turn-ing clockwise will increase the com-pensating pressure,

turning counter-clockwise will decrease the compensatingpressure. The adjustment spindle has a thread pitch of1mm (thread M 12 x 1).

The following limits exist for the three spring options:

Note! Danger of spring overload at maximum possibleadjustment pressure!

Adjustment screw

Lock nut

Size

Displacementchange permm(approx.cm/U)

Displacementchange perturn(approx.cm/U)

Minimumadjustabledisplacement(approx.cm/U)

PV016 1.5 1.5 9

PV020 1.5 1.5 13

PV023 1.5 1.5 16

PV032 2.2 2.2 17

PV040 2.2 2.2 25

PV046 2.2 2.2 30

PV063 3.4 3.4 35

PV080 3.4 3.4 50

PV092 3.4 3.4 65

PV140 5.6 8.4 20PV180 5.6 8.4 60

PV270 6.8 10.2 120

Pres-surerange

Nominalpressurebar

Minimumpressuresettingbar

Pressurevariationper turn /per mmbar

Note!Maximumpossibleadjustmentbar

D 140 8 - 10 20 170

H 210 8 - 10 40 350

W 350 8 - 10 60 450


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Installation Manual

Although for all three springs the min. adjustable pressureis approx. 8 - 10bar (min. compensating pressure of aPV pump), for the spring code H a min. pressure adjust-ment of 40 bar and for the spring code W a min. pressureadjustment of 70bar is recommended. Adjusting lowerpressures with these springs can lead to an extremelyslow compensator response.

The max. possible pressure adjustment is reached, whenthe spindle is completely turned in (snap ring touchesthe lock nut). In this situation there is a danger of springoverload depending of manufacturing tolerances. If sucha high adjustment should be prohibited, washers can beplaced between lock nut and snap ring.

4. Remote pressure compensator, code FRC

For the remote pressure compensator the pressure ad-justment is done at a pressure pilot valve (not included inthe shipment of the pump). The pilot valve is connectedto the remote port.

The pressure pilot valve must be capable of handlingsecurely a pilot flow of approx. 1.2l/min.Therefore a nomi-nal flow of 3 - 6l/min is recommended for the pilot valve.Selection of a pilot valve too small or too large can resultin compensator instability.

The pilot port thread can be determined from the orderingcode of the pump (threads and port code):

The pilot valve can be mounted as far as 15m away fromthe pump. Please note for a distance above 5m, that lowtemperatures and a high fluid viscosity can significantlyincrease the compensating pressure.

The pilot connection should be dimensioned to avoid anyconsiderable pressure drop in this line.

The pressure adjustment and the max. pressure settingare given by type and setting of the pilot valve.

The min. compensating pressure can be calculated from

the min. adjustable pressure of the pilot valve plus thedifferential pressure setting at the compensator.

Factory setting for the compensator differential pressureis 15 1bar. This adjustment should only be modified, ifspecifically required. To change the adjustment the locknut is to be loosened and the adjustment spindle to beturned. Clockwise turning will increase the differentialpressure setting.

Snap ring

Adjustment spindle

Lock nut

Snap ring

Adjustment spindle

Lock nut

Remote port

Threads and port code Port dimensions

1 G 1/4 BSPP

3 7/16-20 UNF

7 M12 x 1.5 ISO 6149-1

8 M12 x 1.5 ISO 6149-1


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Installation Manual

The adjustment range reaches from approx. 8bar to ap-prox. 80bar. The actual compensating pressure is givenby the pressure setting of the pilot valve at nominal pilotflow (approx. 1.2l/min) plus the compensator differentialpressure.

At factory setting and fully unloaded remote port the min.compensating pressure is 15bar.

5. Remote pressure compensator, codes FR1, FRZ

For the remote pressure compensator the pressure adjust-ment is done at a pressure pilot valve (not included in theshipment of the pump). This pilot valve is mounted to theNG6 interface on top of the compensator valve. Parkeroffers a wide variety of compensator accessories (pilotvalves) under ordering code PVAC* .

The pressure pilot valve must be capable of handlingsecurely a pilot flow of approx. 1.2l/min.Therefore a nomi-nal flow of 3 - 6l/min is re commended for the pilot valve.Selection of a pilot valve too small or too large can resultin compensator instability.

The pilot valve is mounted directly on top of the com-pensator valve (mounting interface NG6, DIN 24340 oncompensator topside). The mounting threads for the pilotvalve are M5 for threads and port code 1 and 8 or #10 - 24UNC for threads and port code 3 and 7.

Beside a manual operated pilot valve (e. g. code PVAC1P*)also a proportional pressure valve (e. g. DSAE* or RE*)

or a multiple pressure pilot circuit (e.g. PVAC2P*) can beinstalled.

Compensator accessories see Catalogue HY11-2500/UK, chapter 1.

Proportional pressure pilot valves and driver electronicsto operate these valves see Catalogue HY11-2500/UK,chapters 4 and 10.

The pressure adjustment, and the max. pressure are de-fined by type and nature of the pressure pilot valve.

For differential pressure adjustment the true differentialpressure should be measured (pump outlet pressureminus pilot pressure). An adjustment only measuringpump outlet pressure requires an absolutely pressurefree remote port.

Functional descriptions and circuit diagrams of all com-pensators see Catalogue HY11-2500/UK, chapter 1.

The min. compensating pressure can be calculated fromthe min. adjustable pressure of the pilot valve plus thecompensating differential pressure adjusted at the com-pensator.

Factory setting for the compensator differential pressure

is 15 1bar. This adjustment should only be modified ifnecessary. To change the adjustment the lock nut is tobe loosened and the adjustment spindle to be turned.The adjustment range reaches from approx. 8bar to ap-prox. 80 bar. The actual compensating pressure is givenby the pressure setting of the pilot valve at nominal pilotflow (approx. 1.2l/min) plus the compensator differentialpressure.

At factory setting and fully unloaded remote chamber(compensator spring chamber) the min. compensatingpressure is 15bar.

For differential pressure adjustment the true differentialpressure should be measured (pump outlet pressure mi-

nus pilot pressure). An adjustment when only measuringthe pump outlet pressure requires an absolutely pressurefree compensator spring chamber.


Snap ring

Adjustmentspindle

Lock nut

Mounting interface NG6, DIN 24 340 for pressure pilot valve


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Installation Manual

6. Load sensing compensator, code FFC

The load sensing or flow compensator primarily controlsthe pump output flow. To achieve this the load pressureafter a main stream throttle valve (load sensing valve, notincluded in the shipment of the pump) is connected to the

load sensing port of the compensator. The compensatorcontrol strategy is, to keep the pressure drop constantacross this main stream throttle valve.

To add pressure compensation to the load sensing func-tion, an orifice ( 0.8mm) is to be added into the loadsensing line and a pressure-pilot valve must be connectedbetween orifice and compensator valve (see circuit dia-gram).

Circuit diagram of a load sensing compensator with external pressure pilot valve

The pressure pilot valve must be capable of handlingsecurely a pilot flow of approx. 1.2l/min.Therefore a nomi-nal flow of 3 - 6l/min is re commended for the pilot valve.Selection of a pilot valve too small or too large can result

in compensator instability.The pressure adjustment and the max. pressure are de-fined by type and nature of the pressure pilot valve.

The minimum compensating pressure can be calculatedfrom the min. adjustable pressure of the pilot valve plusthe compensating differential pressure adjusted at thecompensator.

Snap ring

Adjustment spindle

Lock nut

Load sensing port


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Installation Manual

Factory setting for the compensator differential pressureis 10 1bar. This adjustment should only be modified ifnecessary. To change the adjustment the lock nut is to beloosened and the adjustment spindle to be turned.

The adjustment range reaches from approx. 8bar to ap-prox. 80bar. Note, that a higher adjustment means higher

power losses at the load sensing valve.

The actual compensating pressure is given by the pres-sure setting of the pilot valve at nominal pilot flow (approx.1.2l/min) plus the compensator differential pressure.

At factory setting and fully unloaded remote chamber(compensator spring chamber) the minimum compensat-

ing pressure is 10bar.

For differential pressure adjustment the true differentialpressure should be measured (pump outlet pressureminus pilot pressure). An adjustment only measuringpump outlet pressure requires an absolutely pressure freecompensator spring chamber.

The pressure adjustment also influences the effectiveoutput flow of the pump. The higher the differential pres-sure setting, the higher the flow at a given setting of theload sensing valve.


The connecting thread at the load sensing port is definedby the threads and port option of the pump orderingcode:

7. Load sensing compensator, codes FF1, FRZ

The pressure pilot valve must be capable of handlingsecurely a pilot flow of approx. 1.2l/min.Therefore a nomi-nal flow of 3 - 6l/min is recommended for the pilot valve.Selection of a pilot valve too small or too large can resultin compensator instability.

The thread at the load sensing port is given by the threadsand port option of the pump ordering code:

The load sensing or flow compensator primarily controlsthe pump output flow. To achieve this the load pressure

after a main stream throttle valve (load sensing valve, notincluded in the shipment of the pump) is connected to theload sensing port of the compensator. The compensatorcontrol strategy is, to keep the pressure drop across thismain stream throttle valve constant.

In addition the compensator with the code FF1 comeswith a top side mounting interface NG6 DIN 24340 anda pilot orifice 0.8mm in the load sensing port. Directlyon the mounting interface a pressure pilot valve can bemounted. The mounting threads for the pilot valve are M5for threads and port code 1 and 8 or #10 - 24 UNC forthreads and port code 3 and 7.

Snap ring

Adjustment spindle

Lock nut

Load sensing port



1 G 1/4 BSPP3 7/16-20 UNF

7 M12 x 1.5 ISO 6149-1

8 M12 x 1.5 ISO 6149-1


1 G 1/4 BSPP

3 7/16-20 UNF

7 M12 x 1.5 ISO 6149-1

8 M12 x 1.5 ISO 6149-1


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Installation Manual

The pressure adjustment and the max. pressure are de-fined by type and nature of the pressure pilot valve.

The min. compensating pressure can be calculated fromthe min. adjustable pressure of the pilot valve plus thecompensating differential pressure adjusted at the com-

pensator.

Factory setting for the compensator differential pressureis 10 1bar. This adjustment should only be modified ifnecessary. To change the adjustment the lock nut is to beloosened and the adjustment spindle to be turned. Theadjustment range is from approx. 8bar to approx. 80bar.The actual compensating pressure is given by the pres-sure setting of the pilot valve at nominal pilot flow (approx.1.2l/min) plus the compensator differential pressure.

At factory setting and fully unloaded remote cham-ber(compensator spring chamber) the min. com-pensatingpressure is 10bar.

For differential pressure adjustment the true differentialpressure should be measured (pump outlet pressure

minus pilot pressure). An adjustment only measuringpump outlet pressure requires an absolu-tely pressurefree compensator spring chamber.

The pressure adjustment also influences the effectiveoutput flow of the pump. The higher the differential pres-sure setting is, the higher the flow is going to be at a givensetting of the load sensing valve.


8. Two-spool load sensing compensator, codes FT1, FTZ

The two spool compensator, code FT1 has two separatecompensator valves for flow and pressure.

The flow compensation is done with the lower valve. Itis connected to the load sensing port of the hydrauliccircuit.

The remote pressure compensator is mounted on top ofthe flow compensator and it overrides the flow compensa-tion, when pressure setting is reached. On the mountinginterface NG6, DIN 24340 on top of the pressure compen-sator stage as described for the remote pressure com-pensator FR1 any pressure pilot valve can be mounted,as long as is fulfills the requirements described there.

Mounting interface, threads and port dimensions seeCatalogue HY11-2500/UK, chapter 5.

The factory setting of the flow compensator is 10 1bar,the adjustment for the pressure compensator is 15 1bar.These adjustments should only be modified, when nec-

essary.

Snap ring

Adjustment spindle

Lock nut

Snap ring

Adjustment spindle

Lock nut

Load sensing port


remotepressure

compensator

loadsensingcompen-

sator

To change the adjustment the lock nut is to be loosenedand the adjustment spindle to be turned. The adjustmentrange reaches from approx. 8 bar to approx. 80bar. Theactual compensating pressure is given by the pressuresetting of the pilot valve at nominal pilot flow (approx. 1.2l/

min) plus the compensator differential pressure.At factory setting and fully unloaded remote chamber(compensator spring chamber) the min. compensatingpressure is 10bar.

For differential pressure adjustment the true differentialpressure should be measured (pump outlet pressureminus pilot pressure). An adjustment only measuringpump outlet pressure requires an absolutely pressure freecompensator spring chamber.


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Installation Manual

Section of a horse power compensated pump9. Horse power compensator, codes *L*, *C*

Depending on its type, the horse power compensatorconsists of a modified remote pressure compensator ora modified load sensing compensator in combination withthe horse power pilot cartridge. The opening pressure of

this pilot cartridge depends on the actual displacement ofthe pump. At large displacements the opening pressure islow. As the displacement is reduced the opening pressureis increased according to the form of the contour sleeve inthe pump. That leads to the desired control characteristic(constant input horse power).

That is achieved by having the pilot cartridge seat beingguided by the contour sleeve. This contour sleeve is firmlyconnected to the servo piston. The contour represents thedesired input horse power.

The horse power pilot cartridge is internally con-nectedto the compensator valve. Compensator valves for horsepower compensated pumps differ from standard compen-

sator valves only in this additional port in the mountinginterface.

For a standard horse power compensator with orderingcode *L* a modified remote pressure compensator is used.For a horse power compen-sator with load sensing, code*C* a modified load sensing compensator is used.

Constant horse power curve with adjustment

At the adjustment screw of the horse power pilot valve abasic adjustment of the horse power compensator canbe made.

Attention: 0.1 mm equals approx. 20 bar!

After loosening the lock nut (self-sealing nut) the com-pensator control curve can be moved by turning theadjustment screw (adjustment A in the diagram left). Thisadjustment, done to meet the required constant input

horse power curve, is already made during the factory testand should be modified only in exceptional cases.

To adjust the correct constant horse power curve a meas-uring device is required. An output power measurementrequires pressure and flow metering. An input powermeasurement requires torque and speed measurementor a measurement of the electric motor current.

Adjustment A

Tolerance compensation for optimized performance; doneat pilot cartridge.

Adjustment B

Max.pressure setting; done at pressure pilot valve.

Horse power pilot cartridge

Set screw

Lock nut


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Installation Manual

9.1 Horse power compensator, ordering codes *LA resp. *CA

A horse power compensator with ordering codes *LAresp. *CA has a compensator valve with a topside mount-ing interface NG6, DIN 24340. Any pilot valve can be

mounted when it fulfills the requirements. Valve selection,requirements and mounting dimensions see CatalogueHY11-2500/UK, chapter 4.

For horse power compensators with ordering codes *LBresp. *CB the compensator valve has a pilot port on itsside. If no pilot valve pilot valve for adjustable pressurecompensation is connected, the compensating pressureis defined by the design of the contour sleeve and can bein the range of 370 20bar, depending on the adjustmentof the horse power pilot valve.

9.2 Horse power compensator, ordering codes *LB resp. *CB

If another compensating pressure or a closer tolerance isrequired, an external pilot valve can be connected. Exter-nal pilot valve, requirements and adjustment proceduressee Catalogue HY11-2500/UK, chapter 3.


9.3 Horse power compensator, ordering codes *LC resp. *CC

With horse power compensator orderingcode *LC resp. *CC an adjustable pres-sure pilot valve is included in the ship-ment. The valve is mounted on top ofthe compensator valve. After looseningthe lock nut, turning of the adjustmentscrew allows a setting of the compen-sating pressure between approx. 20barand 350bar (adjustment B in figure onprevious page).

Snap ring

Adjustment spindleLock nut

Load sensing port, forcode *LA plugged


Snap ring

Adjustment spindle

Lock nut

Remote resp.

load sensing port

Load sensingport, for code*LC plugged

pressurepilotvalve

PVAC1PCMNS

remotepressurere

sp.

loadsensingcompe

nsator

Lock nutSet screw


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Installation Manual

10. Proportional displacement control, code FPV

The electrohydraulic proportional displacement controlconsists of the proportional displacement control valveshown above and the inductive position transducer (LVDT)used for the displacement feedback.

LVDT and proportional displacement control valve arefactory set and the adjustment is secured. Any new orre-adjustment is only necessary after repair or service.

Prior to an adjustment first the setting dimension of theLVDT probe is to be checked (see figure and table above).The adjustment is secured with an adhesive.

Any new adjustment must be secured with an adhesive,to avoid unintentional variation of the adjustment.

Setting dimension for LVDT armature

After that the zero setting of the LVDT must be controlled.The LVDT must be connected to terminals 23, 24 and25 of the electronic control module and the solenoid toterminals 14 and 15.

When the pump is running the input command for the dis-placement is to be set to 0 and the pressure relief valve ofthe system / test rig should be set to a pressure > 25bar.All other valves of the system must be closed.

The pump then will compensate at the min. compensatingpressure (10 2bar) to its min. displacement. By adjustingthe zero adjustment potentiometer at the LVDT the voltageat the diagnosis output must be adjusted to 0V, becausethis situation represents the absolute minimum working

displacement of the pump.

Inductive position transducer (LVDT)

Cap nut

Electrical connectionLock nut

Plug withO-ringsealing

Zero ad-justment(secured)

Do notadjust!

Electricalconnec-tion

Series 40

Series 42

Series 41


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Installation Manual

Then the set command for the displacement must beraised, until the max. swash plate angle is reached. Thiscan either be checked by monitoring the diagnosis out-put or by using a flow meter. The swash plate angle hasreached its maximum, when the displacement does not

grow further, even when the input command is increased.If the input command reaches 10V (or 20mA for electronicmodules with current input = max. input command) beforethe max. displacement is reached, the displacement canbe increased further by using the MAX potentiometer onthe module.

11. Electrohydraulic p/Q control, codes FPR, FPZ

If the max. displacement is reached at an input commandconsiderably below 10V, a correction can also be achievedby setting the MAX potentiometer accordingly.

To perform a basic adjustment of the proportional displace-ment compensator valve, first the cap nut, the lock nut and

the O rings and washers must be removed.

Then a medium input command is to be adjusted (e. g.:50% displacement).

In this control situation the proportional solenoid shoulddraw approx. 60% of its nominal current (nominal cur-rent 1.3A; current in control situation 750mA). Under thiscondition the solenoid works at half its nominal force incontrol position and a similar control response speed isachieved for upstroking and downstroking. Turning theset screw varies the solenoid current. Clockwise turningincreases the solenoid current. After that the set screw isto be secured with the lock nut and the adjustment screwto be covered by the cap nut.

See Catalogue HY11-2500/UK, chapter 10.

Note

The proportional displacement control code FPV doesnot include pressure compensation. Therefore thehydraulic circuit must be equipped with a pressurerelief valve capable of the full pump output flow.

The electrohydraulic p/Q control, code FPR is equippedwith an additional remote pressure compensator valve on

top of the proportional displacement control valve. Thisvalve overrides the displacement control, when the max.pressure setting of the pilot valve is reached (see figureon following page).

This remote pressure compensator is equivalent to thevalve used for pressure compensation in the two spool-compensator code FT1, described in Catalogue 2500/UK, chapter 8. There also the adjustment is described. Asnoted there the compensating differential pressure is fac-tory set to 12 1bar, leading to a minimum compensatingpressure of also 12bar.

For an electronic pressure adjustment the use of a pro-portional pressure pilot valve with NG6 mounting interface

is recommended, e. g.: the series DSAE* or RE* on topof the remote pressure compensator stage. These valvesare optimally adjusted for use with pump compensatorand can be powered by the electronic control modulesPQ0*-P00 or PQ0*-Q00. The solenoid of the pressurevalve is to be connected to terminals 16 and 17 of thecontrol module.

Please note: The proportional control only can work, whenthe pump output pressure is above 10 - 15bar. Below thatthe servo spring of the pump cannot be compressed andthe pump will not compensate.

Set screw (basiccompensator valveadjustment)


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Installation Manual

12. Compensator accessories12.1 Pressure relief pilot valve, code PVAC1P*

After loosening the lock nut SW13 an adjustment of thecompensating pressure for the pump is possible in a rangeof approx. 20bar up to 350bar.

The pressure pilot valve is also available with a DINlock.

Basic adjustment of the proportional displacement con-trol valve (lower valve) see Catalogue HY11-2500/UK,chapter 10.

For adjustment of the remote pressure compensatorstage, see remote pressure compensator FR1 in Cata-logue HY11-2500/UK, chapter 4.

See also installation manuals for electronic modulesPQ0*-P00, Bulletin 3241-M1/UK and PQ0*-Q00, Bulletin3242-M1UK.


The pressure relief pilot valve code PVAC1P* is optimallytuned for the requirements of the compensator valves ofthe series PV. It has a mounting interface NG6 accordingto DIN 24340 and can be mounted directly on top of allcompensator valves with the topside mounting interface.

Mounting interface NG6, DIN 24 340for pressure pilot valve

Basic compen-sator setting

Electrical connection

Lock nut

Set screw


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Installation Manual

For code PVAC2P* a single-solenoid directional controlvalve is included for pressure selection. The valve switchesbetween low pressure setting and high pressure setting.During low pressure both pilot cartridges are connected tothe compensator, in the high pressure situation (solenoidenergized) only the A-side cartridge is connected. There-fore the B-side pilot needs to be set for low pressure. Thedirectional control valve series D1VW has spool code 6.

For code PVAC2E* for pressure selection a two- sole-noid directional control valve is included, which switchesbetween low pressure setting, high pressure setting andstandby pressure. In neutral position both cartridges areconnected to the compensator valve. The lower pressuredefines the compensating pressure of the pump. Whenthe A solenoid (B-side) of the DCV is energized only theA-side cartridge is connected; the (higher) pressure ad-justed there defines the compensating pressure.

When solenoid B is energized the valve spool con-nectsall four ports. Then the spring chamber of the compensatorvalve is directly connected to the case drain of the pump,the pump compensates works at minimum compensatingpressure (standby).

The directional control valve series D1VW has spool code55. This spool code is used to avoid a blocked spool posi-tion during transient.

This version is recommended, when during a machinecycle the pressure is to be switched between high andlow.

For code PVAC2M* also a dual solenoid valve is used.In neutral position all four ports are connected. The com-pensator spring chamber is connected to the case drain,the pump is compensating at min. compensating pressure(standby).

When energizing solenoid A (B-side) the spring chamberis connected to the A-side pilot cartridge; the pressureadjusted here controls the pump.

When solenoid B is energized the spring chamber of thecompensator is connected to pilot cartridge B; then thepressure adjusted on this cartridge defines the pumpcompensating pressure. With this version the pressuresettings can be adjusted independently; no high / lowpreference is to be observed. The DCV of the series D1VWhas spool code 2.

This version should be used, when between high and lowpressure selection the standby operation is used in the

machine cycle.Code PVAC1E* is similar to code PVAC2P*, with the ex-ception, that only one pilot cartridge is installed. In neutralposition of the D1VW the standby pressure is selected.

Please consult our main Catalogue HY11-2500/UK for allfurther information and functional descriptions.

For multiple pressure pilots, codes PVAC2P*, PVAC2E*and PVAC2M* a sandwich valve with two direct-actionpressure cartridge valves is used to pilot the pump.

12.2 Multiple pressure pilots PVAC1E*, PVAC2P*, PVAC2E* aund PVAC2M*

For more information, spare parts or service pleasecontact:Parker Hannifin GmbH

Hydraulic Controls DivisionBusiness Unit Pumps and MotorsGutenbergstr. 3841564 Kaarst, GermanyPhone: +49-181-99 44 43 0Fax: +49-2131 / 513-285

Set screw

Lock nut

Mounting interface forDCV series D1VW

(directional controlvalve included inshipment)


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Installation Manual

13. Trouble shooting guide

Pump delivers no output flow.Drive motor does not turn.

Reason

Solution

Motor is not connected correctly or one of the three phases has failed. Motor does not turn smoothly

when pump is disconnected from pump.Check motor connections, check electrical power supply.

Reason

Solution

Pump mechanically blocked. Motor turns smoothly when disconnected from pump.

Send pump to factory for service.

Drive motor only turns at slow speed.

Reason

Solution

Motor is not selected properly. In star circuit not enough torque.

Start pump at unloaded system. Use motor with more horse power.

Reason

Solution

Pump is hydraulically blocked. No function of compensator, no pressure relief valve. Pump stops aftere few turns.

Check function of pump compensator (see below). Start pump at unloaded system.

Drive motor turns, pump does not turn.

Reason

Solution

Coupling is not or not correctly mounted.

Check coupling assembly and correct it.

Drive motor turns and pump turns.

Reason

Solution

Wrong direction of rotation.

Change direction of motor rotation.

Reason

Solution

Fluid reservoir empty or not filled to level, suction line ends above fluid level.

Fill reservoir to required level, if necessary increase suction pipe length.

Reason

Solution

Suction line is blocked. E. g. by plugs, cleaning tissues, plastic-plugs. Ball valve in the suction line closed.Suction filter blocked.

Check suction line for free flow. Open valves in suction line. Valves should be equipped with electricalindicator. Check suction filter.

Reason

Solution

Suction line not gas tight, pump gets air into suction port.

Seal suction line against air ingression.

Reason

Solution

Pressure line / system is not able to bleed air out.

Unload pressure port, unload system before start, bleed air from pressure line.

Pump does not build up pressure, but delivers full flow at low pressure.

Reason

Solution

Standard pressure compensator is set to minimum pressure.

Adjust compensator setting to desired pressure.

Reason

Solution

Orifice in remote pressure compensator blocked.

Make sure orifice 0.8 mm in control spool is free and open.

Reason

Solution

No pressure pilot valve connected to port PR.

Install suitable pressure pilot valve and adjust it to the desired setting.

Reason

Solution

Multiple pressure pilot selector valve is not energized. Pump works in stand-by.

Energize selector valve solenoid.

Reason

Solution

No load sensing line connected.

Connect system load sensing port to compensator.

Reason

Solution

Load sensing valve is closed or too small.

Open load sensing valve, use larger valve size.


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Installation Manual

Reason

Solution

Too much pressure drop between pump and load sensing valve.

Make sure connection is wide enough and has not too much pressure drop.

Reason

Solution

Differential pressure at compensator is adjusted improperly (too low).

Check differential pressure adjustment and correct it as described above.

Reason

Solution

Horse power compensator setting changed.

Check setting of horse power compensator and correct it, if required.

Reason

Solution

Proportional displacement control is not connected as required.

Check wiring; connect according to installation manual for electronic module.

Reason

Solution

Displacement transducer (LVDT) adjustement changed.

Correct zero setting at displacement transducer.

Reason

Solution

Electronic module has no supply power.

Make sure module is powered with 22 - 36 V DC.

Reason

Solution

Plug instead of orifice 0.8 mm in the load sensing line to pump.

Install orifice as required.Reason

Solution

Cylinder block lifts from valve plate due to excessive wear.

Send pump to factory for service.

Pump does not compensate.

Reason

Solution

No orifice is in load sensing line to compensator code FFC.

Install orifice 0.8 mm as shown in circuit diagram (page 9).

Reason

Solution

No pressure pilot valve connected to compensator or valve is blocked.

Connect pressure pilot valve to compensator, make sure valve opens as required.

Reason

Solution

Load sensing line connected incorrectly (e. g. upstream of load sensing valve)

Connect load sensing line downstream (actuator side) of load sensing valve..

Reason

Solution

No or too low pressure at pump outlet port.

Pump outlet pressure must be at least 15 bar, because otherwise the bias spring in the pump cannotbe compressed.

Pump does not upstroke, sticks at zero displacement.

Reason

Solution

Compensator is blocked due to contamination.

Clean hydraulic fluid, clean compensator valve.

Reason

Solution

Cable to LVDT or proportional solenoid is interrupted.

Check wiring and make sure cable is ok. Replace if necessary.

Compensator is unstable.

Reason

Solution

Compensator spool sticks, due to contamination of hydraulic fluid.

Clean hydraulic system, clean compensator valve.

Reason

Solution

Compensator differential pressure changed (too low or too high).

Adjust compensator differential pressure to required setting.

Reason

Solution

Wrong pilot orifice or pressure pilot valve improperly selected.

Select pilot orifice and pressure pilot valve as recommended.

Reason

Solution

Dynamic critical system, e. g.: pressure compensator combined with pressure reducing valve, loadsensing (flow) compensator combined with flow control valve.

Use remote pressure compensator instead of standard pressure compensator, install orifice in loadsensing line remote from compensator (as close as possible to load sensing valve).


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Parker Hannifin GmbH & Co KG HY30-3250-INST/UKPump and Motor Division Art. No xxxxxxxNeefestr. 96D 09116 Chemnitz

Tel.: +49-(0)371-3937-0Fax: +49-(0)371-3937-170www.parker.comCopyright 2006by Parker Hannifin GmbH & Co KG

Offer of SalePlease contact your Parker representation for a detailed Offer of Sale.

FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS AND/OR SYSTEMS DESCRIBED

HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE.

This document and other information from Parker Hannifin Corporation, its subsidiaries and authorized distributors provideproduct and/or system options for further investigation by users having technical expertise. It is important that you analyze allaspects of your application, including consequences of any failure, and review the information concerning the product or sys-tem in the current product catalogue. Due to the variety of operating conditions and applications for these products or systems,the user, through its own analysis and testing, is solely responsible for making the final selection of the products and systemsand assuring that all performance, safety and warning requirements of the application are met.

The products described herein, including without limitation, product features, specifications, designs, availability and pricing, aresubject to change by Parker Hannifin Corporation and its subsidiaries at any time without notice.

WARNING!

DECLARATION BY THE MANUFACTURER(Directive 98/37/EG, Art. 4.2 and Annex II, sub B)PROHIBITION TO PUT INTO SERVICE

Parker Hannifin AB Trollhttan declare with this declaration that our products:

Are intended to be incorporated into machinery or to be assembled with other machinery toconstitute machinery covered by Directive 98/37/EG.

Are in accordance with technical specification stated in our product catalogue.

And furthermore declares that is not allowed to put the machinery into service until themachinery into which it is to be incorporated or of which it is to be a component has beenfound and declared to be in conformity with the provisions of Directive 98/37/EG and withnational implementing legislation, i.e. as a whole, including the machinery referred to in this

declaration.

Parker Hannifin ABHydraulics GroupPump and Motor Division, Trollhttan

Lars Eliasson

Business Unit Manager



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