Working principle of the pneumatic pneumatic valve, double-acting and single acting pneumatic pneumatic valve

Pneumatic pneumatic valve by pneumatic actuators and pneumatic valve, due to the characteristics of the pneumatic valve itself, such as light weight, simple structure, easy operation, etc. , often used in large diameter low pressure piping installation. Pneumatic pneumatic valve in accordance with the pneumatic valve seal form classification, can be divided into pneumatic sealing pneumatic valve, pneumatic valve, pneumatic hard seal the pneumatic sealing pneumatic valve, etc. ; According to the classification of pneumatic actuators, pneumatic valve can be divided into double-acting pneumatic, single-acting pneumatic pneumatic valve. This paper mainly introduces the double-acting pneumatic pneumatic valve and the working principle of single acting pneumatic pneumatic valve.






the work principle of double-acting pneumatic pneumatic valve:

about double-acting pneumatic valve has two chamber, pneumatic valve by double-acting pneumatic positioner output air pressure signal input actuators respectively the piston of left and right two air chamber. Due to input on both sides of the air chamber air pressure is different, the two will form the pressure difference between air chamber, pushing the pistons for linear motion. Through the gear and rack driving, will be converted to the linear motion of the piston actuator spindle rotation, when the left and right two air chamber pressure balance, movement to stop. If need to adjust the flow, you need to at the same time of actuators for rotary motion to drive pneumatic valve stem, rotation of the pneumatic valve core, in order to change the circulation between pneumatic valve, pneumatic valve seat area, in order to achieve adjustment purpose.





pneumatic actuators with double acting internal structure


the single-acting pneumatic pneumatic valve working principle:

single function of single-acting pneumatic valve positioner output gas pressure signal input to the pneumatic actuator without spring side of the chamber, due to the effect of gas pressure signal of the piston on difference exists between the thrust and the spring force, under the condition of the cylinder piston do linear motion. Through the gear and rack driving gas signal pressure formation of the thrust and the spring force balance, motion stops.

and, at the same time of actuator shaft for rotation drive pneumatic valve stem, pneumatic valve core for rotary motion, thus change the circulation between the pneumatic valve, pneumatic valve seat area, the purpose of regulation.






pneumatic single-acting actuator internal structure


attached: pneumatic pneumatic valve installation pipeline schematic










to learn more about pneumatic pneumatic valve products, please browse the pneumatic pneumatic valve catalog!