The working principle of the CRV04 cartridge type direct operated relief valve series are controlled by the inlet pressure of the oil through the damping piston acting on the bottom, forming a spring force to compete with the fluid pressure.
When the fluid pressure regulator spring than the spring force, the cone valve is closed, the direct operated relief valve can not afford to regulator role.
With the inlet pressure continues to increase. When fluid pressure is greater than the spring force, the cone
valve is open, the excess oil back to the tank overflow, so that the inlet pressure on the stability of the transfer value.
Max. operating pressure:210 BAR
Pressure adjustment range: 12-120bar; 100-120bar
Rated flow capacity: 15L/MIN
Internal leakage: ≤3ml/min
Recommended filtration: 25 MICRON
Hydraulic fluids: Mineral Oil, Viscosity 10 - 400 cST
Temperature range: -5° C to +80° C
Note: For extension of the service life, It is better to use the condition where is no gas or dust in ambient which can corrupt metal or destroy nonconductor
The cartridge type direct operated
relief valve technical data and installation dimensions as follow;