Bellows seal gate valves of the open-close part is damper, bellows seal valve disc movement direction and the direction of flow phase vertical, bellows seal gate valves can only be full open and close switch should, cannot be adjust and throttle. Bellows seal gate valve gate valve suitable for Class150 ~ 2500, working temperature - 29 ~ 425 ℃ (carbon steel) or - 29 ~ 500 ℃ (stainless steel) red piping, used to cut off or on line in the medium, choose different material, respectively suitable for water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and so on many kinds of medium. Bellows seal gate valves characteristics: fluid resistance is small, the applicable range of pressure, temperature, flow direction of medium is not restricted, sealed performance is good.
Bellows seal gate valves before installation must be appearance inspection, bellows seal gate valve nameplate shall comply with the national standard "general valve mark" GB 12220 regulations. For work pressure is greater than 1.0 MPa and play the role of ZhuGanGuan cut off valve, before the installation, should carry on the strength and the strict performance test, qualified rear must use. Bellows seal gate valves strength test, the test pressure for nominal pressure of 1.5 times, duration of not less than 1 minute, the valve shell, packing should be no leakage for qualified. Leak test, the test pressure for nominal pressure 1.1 times; Test pressure in the duration of the test should comply with the GB 50243 standard requirement, in order to disc sealing face no leakage for qualified. Ram has two sealing surface, bellows seal gate valves are the most commonly used model gate valve two sealing surface formation wedge, the wedge Angle valves with different parameters.
Bellows seal gate valves can be widely used in water, sewage, construction, petroleum, chemical industry, food, medicine, textile, power, shipbuilding, metallurgy, energy system line as regulation and intercepting device use.
 

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