Why should I install a pressure relief valve: According to the "Coal Mine Safety Regulations" provisions of Article 439 of the operation must be equipped with reliable safety valve and drain valve on the air bag, and inspection hole. Must be periodically remove grease air package. The new installation or maintenance of the air bag after the application of 1.5 times the working pressure air compressor to do the hydrostatic test. In the air bag discharge piping must be installed pressure relief valve, pressure relief valve diameter shall not be less than the diameter of the duct, release pressure of 1.25 to 1.4 times the pressure relief valve maximum working pressure of the air compressor used for ground or underground air compression machine systems, air bag installed in the outlet pipe is on the air flow direction, from the security role. Mines and non-coal mines can be used, so long as there is a place where the air compressor can be. Venus breweries such as air compressors, bottle factory air compressor, air compressors and other marine pressure relief valve and pressure relief valve wind package Relief Work difference valve used for ground or underground air compressor systems, installed in the wind package export pipeline is on the direction of the airflow, pressure relief valve diameter shall not be less than the diameter of the duct, release pressure air compressor should be 1.2-1.4 times the maximum working pressure, play a security role. Valve is by adjusting the inlet pressure is reduced to the outlet pressure of a need, and rely on the energy of the medium itself, the outlet pressure of the automatic pressure release valve to maintain a stable structure of the valve: The pressure relief valve from the cylinder, piston group, protective cover and other components. 1. The upper and lower ends of the cylinder and the cylinder block flange welding (or cast) is made in order to enhance the wear resistance and prevent rust cylinder made of stainless steel. 2. Piston group consists of cardboard, O-rings, piston rod and the like. Piston assembly from the cylinder can be loaded via the card board on the left and the piston assembly is fixed in the cylinder, so that it can not move around. 3. The protective cover from the flange, Simplified and door welding (or cast) together. When releasing the pressure relief valve, a protective cover prevents piston flying out assault, play a security role. The pressure relief valve mounted air compressor system package export pipeline stroke is on the air flow direction, when the air compressor system is working properly, the system pressure ≤0.785 (8kgf / cm2), under this pressure, the pressure relief valve work properly. When the air bag due to soot fire or for some reason within the air bag gas explosion, the system temperature, pressure transient increases, when the pressure was raised to 1.03 ± 0.049 (10.5 ± 0.5kgf / cm2), the lever pull off immediately pressure relief valve to release the pressure in the air bag and piping hot, high pressure gas is rapidly released so help ease the blast, to avoid accidents