The leaking part of the disc-type welded metal bellows vacuu

Writer： admin Time：2021-10-14 22:21 Browse：℃

The leaking part of the disc-type welded metal bellows vacuum flapper valve (1) The diaphragm of the pneumatic film actuator is damaged, the push rod and the spring tray are loose, the O-ring is damaged, and the push rod of the counteracting actuator and the lower The seal between the membrane covers leaks, usually because the V-shaped sealing ring is worn, and the upper membrane cover of the top-mounted handwheel mechanism leaks. (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."