Relief Valves

Our relief valves keep hydraulic circuit pressure on an even keel.

We offer flow and pressure capabilities of 1-190 l/min [0.3-50 US gal/min] and up to 415 bar [6,000 psi], respectively.

For more detailed technical information, view our

• quick reference guide Relief Valves (PDF 2 MB)

• circuit examples Relief Valves (PDF 2 MB)

Direct Acting Relief Valves

Direct Acting Relief Valves Example Schematic

Inlet pressure acts on the valve nose, providing pressure relief from the nose (1) to the side (2). Fast response to pressure spikes, with poppet design option for low leakage requirements. Flow range: 1.1-80 l/min [0.3-21 US gal/min]. Pressure capability up to 415 bar [6,000 psi].

 

Differential Area Relief Valves

Differential Area Relief Valves Example Schematic

Inlet pressure acts on the valve nose, providing pressure relief from the nose (1) to the side (2). Available with integral free reverse flow check. Fast response to pressure spikes, with poppet design for low leakage requirements. Improved ability to handle higher flows with a lower pressure rise rate compared to direct acting relief valves. Flow range: 40-150 l/min [11-40 US gal/min]. Pressure capability up to 350 bar [5,080 psi].

 

Pilot Operated Relief Valves

Pilot Operated Relief Valves Example Schematic

Inlet pressure acts on the valve nose, providing pressure relief from the nose (1) to the side (2). Stable design for pressure regulation. Low pressure rise rate for minimum horsepower losses when running at the relief setting for long periods. Flow range: 100-190 l/min [26-50 US gal/min]. Pressure capability up to 350 bar [5,080 psi].

 

Bi-Directional Relief Valves

Bi-Directional Relief Valves Example Schematic

Pressure relief in both directions. Commonly used to replace two direct-acting valves, reducing system cost and complexity. Flow range: 40 l/min [11 US gal/min]. Pressure capability up to 250 bar [3,600 psi].