❖ Product 
Electro-Hydraulic Proportional Pilot Relief Valve
Product details







Model Name

Thread Connection

Pressure Adjusting Range

Coil Resistance

Safety Valve


G01 : 1/4"

C1 : 10~143 kgf/cm2 ( 1.0~14 Mpa )

H2 : 15.3~214 kgf/cm2 ( 1.5~21 Mpa )

3 : 15.3~286 kgf/cm2 ( 1.5~28 Mpa )

4 : 20~357 kgf/cm2 ( 2.0~35 Mpa )

D1 : 10Ω

D2 : 20Ω

R : with safety valve

none : without safety valve


1. Air Bleeding : To enable proper pressure control, loosen the air vent when starting up the pump in order to drain any air from the pump, and fill the insideof the solenoid with hydraulic operational fluid. The position of the air vent can change by loosening the M4 screw and rotating the cover.

2. Mounting Method : Mounting on a vertical surface causes minimum pressure to increase by 2 kgf/cm2 (0.2 Mpa).

3. Manual Pressure Adjusting Screw : For the initial adjustment or when there is no input current to the valve due to an electrical problem or some other reason, valve pressure can be increased by rotating the manual adjustment screw clockwise (rightward). Normally, the manual adjusting screw should be rotated back fully to the left (counterclockwise) and secured with the lock nut.

4. Please minimize the oil pressure in the return line, and make sure that the output of independent tube must be under the oil surface in the tank.

5. Minimum Relief Flow Rate : A small flow rate can cause setting pressure to become unstable. Use a flow rate of at least 0.3 l/min.

6. Load Capacity : When using this valve to control direct circuit pressure, make sure the load volume (P port side volume) is at least 40 cm3.

7. Use an operating fluid that conforms to the both of the following.
Oil temperature: -20 to 70°C.
Viscosity: 12 to 400mm2/s.
The recommended viscosity range is 15 to 60mm2/s.