The safety valve is in a normally closed state under the action of external force, and when the medium pressure in the equipment or pipeline rises beyond the specified value, it passes to the systemA special valve for discharging the medium outside to prevent the pressure of the medium inside the pipe or equipment from exceeding specified values. Safety valve belongs to the automatic valve class, mainly used in boilers,On pressure vessels and pipelines, the control pressure does not exceed the specified value, which plays an important role in protecting personal safety and equipment operation.