MP1 charge pressure relief valve (CPRV) function
An internal charge pressure relief valve (CPRV) regulates charge pressure within the hydraulic circuit. The
CPRV is a direct acting poppet valve that regulates charge pressure at a designated level above case
pressure.
The charge pressure relief valve setting is specified within the model code of the pump. pumps with
charge pump have the CPRV set at 1800 rpm while MP1 pumps without charge pump have the CPRV set
with 18.9 l/min [5.0 US gal/min] of external supply flow. The charge pressure rise rate, with flow, is
approximately 1 bar/10 liter [5.4 psi/US gal].
Charge Pressure
Case Drain
P400341
Service Manual
MP1
Operation
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©
Danfoss | April 2019 AX00000244en-000201
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