Pneumatic valve
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https://bbs.kongfen.cc/data/attachment/common/cf/152520seymtgr6kamztu9e.jpg As shown in the image, does this device serve to amplify air pressure?
Above the intake valve of the reciprocating machine? If it is on a reciprocating machine, it serves to amplify air pressure. (It contains a membrane or piston; gas is applied to one side, while on the other side there is a push rod that presses against the intake valve.)