Hydraulic relief valve is a hydraulic pressure control valve, which mainly functions as pressure relief, voltage regulation, system unloading and safety protection in hydraulic equipment. In the assembly or use of the relief valve, due to the damage of the O-ring, the combined seal, or the looseness of the mounting screws and fittings, it may cause undue external leakage.
If the cone valve or the main spool is worn too much, or the sealing surface is not well contacted, it will cause excessive internal leakage and even affect normal operation.
Hydraulic Relief Valve is generally used as an unloading valve, as a remote pressure regulating valve, as a high and low pressure multi-stage control valve, as a sequence valve for generating back pressure (string on the return road).
Hydraulic Unloading Valve
Hydraulic Safety Valve
Hydraulic Regulating Valve