pvsp_dkmhpn570r102

DKMH.PN.570.R1.02 is new

Tech Note

03-2000 DKMH.PN.570.R1.02 520L0291

Priority module PVSP withintegrated brake charge valve

Integrated charge valve for the braking circuit Compatible with open-centre or closed-centre PVP

pump side modules with flows up to 160 l/min As option also available with a pressure reduction

valve for the braking circuit and a PVLP 63 shock valve for relief of pressure peaks.

With the introduction of PVSP, Danfoss can now sup-ply modules with integrated priority function and brakecharge valves.

The new modules offer the following advantages: Integrated priority function for the OSP steering unit

and/or the working hydraulics, PVB

Introduction

Versions and code numbers Code-

Symbol Description number, CF =1/2, P = 3/4

PVSPMPVSPM module giving priority to 157B6707OSP + PVB (Open center)Max. pump pressure = 350 barMax. pump flow = 160 l/min.

CF flow OSP = 60 l/min 157B6727CF flow PVB = 100 l/min (Closed center)

PVSPPVSP module giving priority tor OSP 157B6708

(Open center)Max. pump pressure = 350 barMax. pump flow = 160 l/min.

CF flow OSP = 60 l/min 157B6728(Closed center)

PVSPM

PVSPM module giving priority to PVB 157B6709(Open center/

Max. pump pressure = 350 bar closed center)Max. pump flow = 160 l/min.

CF flow PVB = 100 l/min

PVSP

PVSP module giving priority to OSP 157B6718(Open center)With charge valve for supply of the

braking circuitMax. pump pressure = 350 barMax. pump flow = 160 l/min.

CF flow OSP = 60 l/min

Book 8a partition 8 www.danfoss.com/fluidpower

PVSPM modules 157B6707,157B6727 and 157B6709to be installed as Mid-Inlet

PVSP modules 157B6708,157B6728 and 157B6718 to be installed as the valvegroup end module instead ofthe PVS end plate

2 DKMH.PN.570.R1.02

PVSP/M1. PP orifice2. Dynamic orifice3. LS orifice for steering unit4. Spring for compensator spool5. Connection for LS-signal from steering unit6. Compensator spool for CF-connection7. PVSP housing8. Priority spool9. Plug, open-centre10. Plug, closed-centre

Priority module PVSP contains a P-connection (forthe pump) and a CF-connection. Accordingly, thestandard pump connections in PVP, PVPVM andPVPDM must therefore always be provided with asteel plug (see example on page 3).The PVSP module can give priority to an OSP stee-ring unit and/or a PVB 32 module. The excessiveflow is passed on through EF to non-prioritised PVB32 basic modules.

If priority is solely given to the OSP steering unit(157B6708, 157B6728 or 157B6718), the PVSPmodule fills in the place of end plate PVS(I). Whenspecifying valve groups of this nature, you are ther-efore not to give in any code number into field 11 inthe specification form (see example on page 6).In valve groups that must give priority to PVB 32(max. one PVB), PVSPM must be mounted as Mid-Inlet (157B6707, 157B6728 and 157B6709). ThePVB module that is given priority must be turned a180 and installed on the right of PVSP (see orienta-tion of ports on pages 4 and 5).PVSP-module 157B6718 includes an integrated

charge valve that feeds the braking circuit throughB1, B2 and B3. State the min required braking circu-it pressure in the LSA field (see example on page 6).As the start/stop ratio of the charge valve is 1:1.2, asetting pressure of, for example, 200 bar will makethe charge valve maintain a braking circuit pressureof 200-240 bar. If the working pressure of the valveexceeds the max permissible braking circuit pressu-re, a pressure reduction valve must be applied.

Note:In prioritised PVB-modules, always remember todismantle the LS shuttle valve (see example onpage 3). And together with prioritised PVB modules,always use endplate 157B2018 (without O-rings).In open-centre systems, prioritised PVB-modulesand steering units must always embody an integra-ted relief valve to avoid that an unintended, highpressure builds-up.

In closed-centre systems, the system relief valve inPVP opens at a (max. 20 bar) higher pressure onthe prioritised functions. It is therefore recommen-ded to use PVB and OSP with integrated relief valve.

CF = controlled flowEF = excess flow

Code numbers of othercomponents

PVSP module 157B6709contains no compensator asit solely gives priority to PVG32. Accordingly, you are notto give in any code numberinto field 13.

PVSIwith no active elements 157B2018with no sealing elements

Compensator spool for PVSP/M

Code no. PP internal pos. 1 Dynamic orifice pos. 2 LS orifice pos. 3 Spring pos. 4Static LS157B7901

0,6 mm Plug 1.2 mm 7 bar

Dynamic LS157B7900

0,6 mm 0,9 mm 1,2 mm 7 bar

End plate PVSI

3DKMH.PN.570.R1.02

PVSP

PVSPM

Characteristics ofPVSP/PVSPM

When specifying a PVG 32valve group that contains aPVSP module, give in thecode number into the fieldfollowing the last PVB-modu-le (in this case in field 6).Give in the code number ofthe compensator spool intofield 13 (see example onpage 6).For choice of stay bolt setPVAS, see page 4.

Give in the code number ofPVSPM into field 5.

For PVSPM, select a PVSendplate without O-rings,code 157B2018 (see exam-ple on page 7)For choice of stay bolt setPVAS, see page 5

CF-flow for OSP as a function of the pressure dropPressure drop in PVSP/M

P P CFPVB

P P EF7 bar spring

OSP static

OSP dynamic

4 DKMH.PN.570.R1.01

Dimensions

Qty, base modul L1 L2 L3 L4Code number Code number

Weight (kg)max. 320 bar max. 350 bar0 82 140 48 35 157B8001 157B8041 0,151 130 189 96 83 157B8002 157B8042 0,252 178 238 144 131 157B8003 157B8043 0,303 226 287 192 179 157B8004 157B8044 0,404 274 336 240 227 157B8005 157B8045 0,455 322 385 288 275 157B8006 157B8046 0,506 370 434 336 323 157B8007 157B8047 0,607 418 483 384 371 157B8008 157B8048 0,658 466 532 432 419 157B8009 157B8049 0,709 514 581 480 467 157B8010 157B8050 0,80

Stay bolt set PVAS

For pump pressures higherthan 320 bar (however, nomore than max. 350 bar) usePVAS 157B8041 157B8050

In valve groups containingthe above combination of mo-dules, use PVAS stay bolt setsas specified in the survey.

Valve group with PVPVM + PVSPSpecification see page 6

Valve group with PVPD + PVSPM

PVSP: LS, B1, B2, B3 = G 1/4LS : G 1/4C: Pilot oil supply for PVED: Pressure relief valve

5DKMH.PN.570.R1.02

Qty, base modul L1 L2 L3 L4 L5 L6Code number Weigth (kg)

PVSPM PVSP PVSPM PVSP1 166 213 131 83 95 - 157B8022 - 0,3 -2 214 262 179 131 143 213 157B8023 157B8022 0,35 0,33 262 311 227 179 191 262 157B8024 157B8023 0,45 0,354 310 360 275 227 239 311 157B8025 157B8024 0,5 0,455 358 409 323 275 287 360 157B8026 157B8025 0,55 0,56 406 458 371 323 335 409 157B8027 157B8026 0,65 0,557 454 507 419 371 383 458 157B8028 157B8027 0,7 0,658 502 551 467 419 431 507 157B8029 157B8028 0,75 0,79 550 600 515 467 479 551 157B8030 157B8029 0,85 0,75

Stay bolt set PVAS

PVAS 157B8022 157B8030are intended for pump pressu-res up to 350 bar

In valve groups containing theabove combination of modu-les, use PVAS stay bolt setsas specified in the survey.

Dimensions

Valve group with PVPVM + PVSPMSpecification see page 7

Valve group with PVPD + PVSP

LS: G 1/4LS : G 1/4C: Pilot oil supply for PVED: Pressure relief valve

6 DKMH.PN.570.R1.01

0 157B 2000 - 157B -Function A-Portp = 100 bar 157B -

B-Port

a 157B 3171 1 157B 6130 157B 7004 13 157B 4216 c

b 157B 2100 LSA - bar LSB - bar 157B 2100 b

a 157B - 2 157B 5940 157B - 13 157B - c

b 157B 2100 LSA - bar LSB - bar 157B - b

a 157B 3171 3 157B 6233 157B 7023 13 157B 4016 c

b 157B 2001 LSA 100 bar LSB 100 bar 157B 2001 b

a 157B 3171 4 157B 6230 157B 7302 13 157B 4016 c


a 157B 3171 5 157B 6233 157B 7021 13 157B 4116 c


a 157B - 6 157B 6718 157B 7900 13 157B - c

b 157B - LSA 100 bar LSB - bar 157B - b

a 157B - 7 157B - 157B - 13 157B - c

b 157B - LSA - bar LSB - bar 157B - b

a 157B - 8 157B - 157B - 13 157B - c


a 157B - 9 157B - 157B - 13 157B - c


a 157B - 10 157B - 157B - 13 157B - c


11 157B -

12 157B 8005Filled in by Date

Proportional Valve PVG 32PVG No.

Specification Subsidiary/DealerCustomer Application

The above is an example specification of a PVG 32 valve group (shown on page 4) with PVSP, 157B6718, mounted.Note: The specification must be completed so that it covers the valve group seen from above.

7DKMH.PN.570.R1.02

0 157B 2000 157B -Function A-Portp = 100 bar 157B -

B-Port

a 157B 3171 1 157B 6130 157B 7004 13 157B 4216 c


a 157B - 2 157B 5940 157B - 13 157B - c

b 157B 2100 LSA - bar LSB - bar 157B - b

a 157B 3171 3 157B 6233 157B 7023 13 157B 4016 c


a 157B 3171 4 157B 6230 157B 7302 13 157B 4016 c

b 157B 2002 LSA bar LSB - bar 157B 2150 b

a 157B - 5 157B 6707 157B 7901 13 157B - c


a 157B 3171 6 157B 6233 157B 7021 13 157B 4116 c


a 157B - 7 157B - 157B - 13 157B - c


a 157B - 8 157B - 157B - 13 157B - c


a 157B - 9 157B - 157B - 13 157B - c


a 157B - 10 157B - 157B - 13 157B - c


11 157B 2018

12 157B 8025Filled in by Date

Proportional Valve PVG 32PVG No.

Specification Subsidiary/DealerCustomer Application

The above is an example specification of a PVG 32 valve group (shown on page 5) with PVSP, 157B6707, mounted.Note: The specification must be completed so that it covers the valve group seen from above.

8 DKMH.PN.570.R1.02

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

DK-6430 NordborgDenmark

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