Unic URW295CR - Oil Flow During Crane Operation

Pressurereducing
valve
Reliefvalvefor
storinghook
Solenoidvalvefor
storinghook
Pressureregulatorvalve
Backpressurevalve
Mainrelief
valve
Tank
Feedback
10.2Oilflowinthein‑outbody
whencraneisbeingoperated
（１０−２）
Emergencyscrew
Oilfedoutofpumpflowsintovalvesforderrick,
hoisting,telescoping,andslewingviaback‑pressure
valveandpressureregulatorvalve.
Workingpressure
ofpump
Set‑bolt
PilotpressurerSolenoidvalveforunloading
Solenoidvalvefor
storinghook
Solenoidvalve
forunlading
pressurereducingvalve
Pump
Tank
2
Mainreliefvalve
2
Reliefvalveforstoringhook
2
Backpressurevalve
2
Pressureregulator
valve
2
Emergencyscrew
(Stopvalve)
3.0MPa
(30kgf/cm)
20.6MPa(210kgf/cm)
Set‑bolt
(Stopvalve)
3.9MPa(40kgf/cm)
G.P
Pailotpressurer
G.P
1.0MPa
(10kgf/cm)
1.0MPa
(10kgf/cm)
Feedback
Primary
pressure
Secondary
pressure
Working
pressure
Portreliefforstoringhook
Solenoidvalve
forunlading
Needlevalveforreleasing
autmaticstopforover‑winding
Pressurereducingvalve
GaugeportforPilotpressure
Mainreliefvalve
Backpressurevalve
3.0MPa(30kgf/cm)
2
2
1.0MPa(10kgf/cm)
Tankport
Solenoidforstoringhook
Accelerator
cylinder
Gaugeport