When the compressed air enters the pneumatic actuator from the A nozzle, the gas pushes the dual pistons to move linearly at both ends (cylinder head end). The gear rack on the piston drives the gear of the rotary shaft lying function to rotate 90C counterclockwise, and the valve is turn on. At this time, the gas at both ends of the pneumatic actuating valve is discharged with the B official nozzle. Conversely, when compressed air enters the pneumatic button from B official nozzle to the two ends of the precessor, the gas pushes the double plug to move linearly in the middle, and the rack on the piston drives the rotating shaft to lie. The valve is closed. At this time, the gas in the middle of the pneumatic actuator is discharged with the A nozzle. The above is the standard transmission principle. According to the user's needs, the pneumatic actuator can be equipped with the transmission principle opposite to the standard type, that is, the clockwise rotation of the selected shaft is used to open the valve, and the counterclockwise rotation is used to close the valve. Single-acting (spring return type) pneumatic actuator A nozzle is the air inlet, B nozzle is the exhaust hole (muffler should be installed on the B nozzle). The inlet of the A tube nozzle is to open the valve. When the air is cut off, the valve is closed by spring force.
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