Danfoss H1 Service Manual

Also see for H1 Series: Technical information Technical information Technical information Technical information Technical information

Contents

High Pressure Relief and Charge Check Valve with Bypass Valve in relief mode (060/068)P003 268High pressure relief and charge check valve in charging modeP109187121. High pressure side of working loop2. Charge check and high pressure relief valveHigh pressure relief and charge check valve in relief modeP109188121. High pressure side of working loop2. Charge check and high pressure relief valveCharge Pressure Relief ValveThe charge pressure relief valve maintains charge pressure at a designated level above case pressure. Thecharge pressure relief valve is a direct acting poppet valve that opens and discharges fluid to the pumpcase when pressure exceeds a designated level. This level is set with the pump running at 1800min-1(rpm). For external charge flow, the CPRV is set with 30 l/min [8 US gal/min]. In forward or reverse,charge pressure will be slightly lower than in neutral position. The model code of the pump specifies thecharge pressure relief valve setting.Typical charge pressure increase from 1.2-1.5 bar per 10 l/min [17.4-21.8 psi per 2.64 US gal/min].Service ManualH1 45/53/60/68 Tandem Closed Circuit Axial Piston PumpsOperation12 | © Danfoss | June 2018 520L0928 | AX00000103en-US0303