Modular hydraulic relief valve is divided into a direct-acting type and a pilot-operated type from the structural principle. The direct-acting type is composed of a valve body, a tapered or spherical valve core and a pressure regulating spring. Its pressure control precision is low, and it is often used as a pilot valve. The other is a pilot-operated relief valve consisting of a pilot valve and a two- or three-stage concentric main valve that allows for small adjustments in pressure and high pressure control accuracy.
Modular Relief Valve
Relief Modular Valve