bellows Industrial Valves with ordinary relief valve working principle is the same as basic, it is between the seat and body increases the bellows. Back pressure instability for exist or poisonous, corrosive medium equipment or piping, as the overpressure protection device. Bellows can eliminate the influence of back pressure fluctuations on the relief valve performance, also can protect the springs and other internal parts from medium corrosion, and can effectively prevent the leakage of medium. Bellows valve has the following features: ( 1) Seat and body to be separate, convenient maintenance and economy. ( 2) Umbrella disc holder can effectively increase the lift, the disc can quickly open in smaller pressure, discharge medium, so as to achieve the purpose of the protection equipment. ( 3) Adjust the circle is able to adjust the pressure difference for opening and closing of satisfaction. ( 4) The disc holder and guide sleeve, stem and adjusting screw materials for the selection of reasonable and appropriate selection of clearance guarantee flexible disc movement. ( 5) Disc and seat sealing surface butt weld hard alloy, the surface after lapping guarantee high tightness and service life. ( 6) Corrugated tube valve in the corrugated tube to remove the back pressure fluctuations affect the performance of the valve, also can protect the springs and the rest of the internal parts from corrosion of the medium. ( 7) Spring and corrugated pipe material selection and processing and according to the strict test and inspection.

bellows valve is suitable for the working temperature & le; 300 ℃ medium such as air, steam, liquefied petroleum gas (LPG) of equipment and piping, as the overpressure protection device. When equipment and pressure exceeds allowable values in the pipeline, the valve automatically opens, then the amount of emissions; When pressure is reduced to the specified value, the valve automatically shut down, guarantee the safe operation of the equipment. Is widely used in electric power, metallurgy, petroleum, chemical industry, such as the bellows Industrial Valves used in reciprocating compressor, not apply for compressor before and after the process fluid pressure fluctuation is too big, and corrugated pipe is more sensitive to this kind of fatigue stress, so the service life of the safety valve will be greatly reduced.

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