Pvpvm Module - Danfoss PVG 32 Service Manual

Service Manual
PVG 32 Proportional Valve Group
PVG 32 Component Troubleshooting

PVPVM module

Failure mode
Leaking externally between
PVPVM and PVB
Valve stack can not build pressure
per valve spec.
© Danfoss | February 2017
PVS plugs
For specifications and operating parameters on PVG 32 valves, refer to PVG 32 Technical Information
Manual 520L0344.
Description: Mid-inlet module only for closed center systems.
Location: Mounted between multiple PVB's in a valve stack.
Function: Provides pressure and tank connections to the valve stack allowing increased flow.
Cause
Uneven mounting surface and mounting
screw torque
Tie rods torqued too tight
Flow exceeding 61 gpm
Option PVLP (shock valve) not seating
correctly in cavity caused by valve not being
installed correctly or it has failed
* Flatness in millimeters - T= 0.35 mm X number of PVB modules + 1
Corrective action
Ensure the valve stack is mounted on a even surface and torque
down correctly
Replace tie rod kit which include section seals and torque to 28
Nm [248 lbf•in]
Lower flow to 61 gpm, and replace the tie rod kit and seals
Install components correctly or replaced damaged components
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