Unic URW295CR - Oil Flow During Hook Storing Relief Function

10.5Oilflowinthein‑outbodywhenhookstoringrelief
valveisbeingfunctionedbyhookstoringoperation
（１０−５）
Mainreliefvalveopenswhenthehookhasbeenstored
andthereliefvalveforstoringhookisactuated.
Oilfedoutofpump,whilegeneratingpressure
of6Mpa,allowssurplusoiltoflowintothetank.
Ｐ1
Pilotpressurer
3MPa
Spool
Mainrelief
valve
Pressurereducing
valve
Emergencyscrew
Solenoidvalveforunloading
Reliefvalve
forstoringhook
Solenoidvalve
forstoringhook
Pressureregulatorvalve
Backpressurevalve
Tank
Set‑bolt
Core
P1
Solenoidvalve
forstoringhook
Reliefvalveforstoringhook
3.9MPa(40kgf/cm)
2
Solenoidvalve
forunlading
pressurereducingvalve
Pump
Tank
Mainreliefvalve
Backpressurevalve
Pressureregulator
valve
Emergencyscrew
(stopvalve)
3.0MPa
(30kgf/cm)
20.6MPa(210kgf/cm)
Set‑bolt
(stopvalve)
G.P
Pailotpressurer
G.P
1.0MPa
(10kgf/cm)
1.0MPa
(10kgf/cm)
2
2
2
2
Feedback
Workingpressure
ofpumpismaintained
at6Mpaorless.
Feedback
Primary
pressure
Secondary
pressure
Working
pressur