The working principle of the pneumatic actuators

Working principle of the pneumatic actuator

when the air pressure from the port ( 2) Enter between piston and cylinder lumen, separate the two piston to move on both ends of the cylinder, gas cavity on both ends of the air through the port 4) Discharge, at the same time, make the two piston rack and synchronous driving output shaft
( The gear) Counterclockwise. And air pressure from the port ( 4) Ends into the cylinder chamber, make the two direction among the piston to the cylinder, the air cavity in the middle of the air through the intake ( 2) Discharge, at the same time, make the two piston rack and synchronous drives the output shaft ( The gear) Rotate clockwise. ( If the piston is relative to the opposite direction installation, output shaft into a reverse rotation)
single acting spring after working principle of the pneumatic actuator

when the air pressure from the port ( 2) Enter between piston and cylinder lumen, separate the two piston to move on both ends of the cylinder, force on both ends of the spring compression, the air chamber through the port (on both ends 4) Discharge, at the same time, make the two live
rack synchronous drives the output shaft ( The gear) Counterclockwise. In the air pressure after reversing solenoid, two piston cylinder in the middle of the spring under the elastic to direction, the gas cavity in the middle of the air from the air port ( 2)
out, at the same time make the two piston rack and synchronous drives the output shaft ( The gear) Rotate clockwise. ( If the piston is relative to the opposite direction installation, spring reset output shaft into a reverse rotation)