❖ Product 
EFBG-03, 06
Electro-Hydraulic Proportional Relief & Flow Control Valve
Product details







Model Name

Thread Connection

Max. Flow

Max. Operational Pressure

Pressure Control Range


03 : 3/8"

06 : 3/4"

125 : 125 l/m

250 : 250 l/m

C : 140 kgf/cm2

H : 255 kgf/cm2

R1 : 12.2~71 kgf/cm2 (1.2~7Mpa)

 R2 : 14.3~143 kgf/cm2 (1.4~14Mpa)

 R3 : 16.3~214 kgf/cm2 (1.6~21Mpa)

 R4 : 16.3~255 kgf/cm2 (1.6~25Mpa)


1. Air Bleeding : In order to ensure stable control, loosen the air vent and bleed air from the valve before starting operation.

2. Manual 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, pressure or flow rate can be increased by rotating the manual adjustment screw clockwise (rightward). Normally, this adjusting screw should be returned completely to its original position and secured with the lock nut.

3. 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.

4. Safety Valve Setting Pressure : For a safety valve without an electro hydraulic proportional pilot relief valve, safety valve pressure is set to minimum pressure 35.7kgf/cm2 (3.5Mpa max.) In the case of a safety valve with an electrohydraulic proportional pilot relief valve, the safety valve setting pressure is set to the minimum adjustment pressure plus 15.3kgf/cm2 (1.5Mpa). When actually using the valve, adjust in accordance with hydraulic circuit pressure.

5. Minimum Relief Flow Rate During Pressure Control : Setting pressure can become unstable when the relief flow rate to the valve's T port is small. Because of this, use a relief flow rate of at least 10 l/min with a nominal diameter of 03 or 06.

6. Valve Mounting Orientation : When an electro-hydraulic proportional pilot relief valve main valve is mounted on a vertical surface with the pilot relief valve part facing downwards make it difficult to bleed air from the pilot relief valve. Because of this, you should not use this type of mounting orientation.

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.