welded metal bellows vacuum baffle valve leakage part

Writer： admin Time：2021-10-14 22:23 Browse：℃

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welded metal bellows vacuum baffle valve leakage part (1) Pneumatic membrane actuator The diaphragm of the pneumatic membrane actuator is damaged, the push rod and the spring tray are loose, the O-ring is damaged, and the reaction actuator push rod and the lower diaphragm cover The air leakage between the seals is usually due to the wear of the V-shaped sealing ring and the air leakage of the membrane cover of the top-mounted handwheel mechanism. (2) Linear stroke cylinder actuator linear stroke cylinder actuator (including for shift fork type quarter-turn actuator) piston sealing ring leakage (blow-by cylinder air leakage), piston cylinder head sealing air leakage, limit screw seal assembly Air leakage, air leakage between the output shaft and the cylinder head. (3) Double-rack structure quarter-turn actuator The sealing ring on the back of the piston of the double-rack structure quarter-turn actuator is leaking, the cylinder head and the cylinder block are leaking, and the upper and lower support seals connecting the output shaft and the cylinder are leaking. , The limit screw on the cylinder head is leaking. (4) External accessories External accessories such as air leakage in the output pipeline joints of each positioner, air-controlled speed increaser or relay, quick exhaust valve, one-way governor and retaining valve."