Manufacturer of Relief Valve

A relief valve protects a lubrication circuit from overpressure by opening a path back to the reservoir once system pressure exceeds its set point. It doesn't snap fully open: a spring holds the poppet closed until hydraulic force on it overcomes the spring force, so the valve cracks open just enough to bleed off the excess and hold the circuit at its set pressure, then closes again once pressure falls back.

This protects the pump and downstream fittings from a blocked line or a metering cartridge bank that has seized, either of which would otherwise let pressure climb unchecked. SP Engineers manufactures relief valves at our ISO 9001:2015 certified works in Faridabad, India, with separate settings for motorized units and for hydraulic/lubrication circuits.