Brief analysis of single and double acting selection and function of skeeg-fork pneumatic actuator

Actuator  according to different users and types, the main driving mode can be basically divided into electric, pneumatic and hydraulic, Pneumatic Actuator can be divided into fork type and rack type according to the form of the internal structure, relative to the traditional rack type that people are more familiar with, we are going to talk about the fork type Pneumatic Actuator that we don't know much about!
First of all, the operation mode of the scootch Pneumatic Actuator is to push the piston to move in a straight line with the compressed air, which is not the mechanical movement of the rack occlusion used in the past, and the transmission strength is weak, so it is more stable in structure, the overall running state is more stable, and the sealing is good. This structure has less internal loss, longer service life, and strong adaptability to the working environment, especially in some harsh environments, and is better than other types of control methods. It is very fast, and the number of turns on and off can reach 1 million times, especially in some devices that are frequently turned on and off!

In the selection, many customers are easy to confuse the actuator in the mode of action, it is divided into single acting and double acting, the difference between the two is whether there is a return function with or without springs. Single-acting pneumatic actuator with spring return function, which means that the initial state of the valve is closed, the valve is opened after inflation, once the air is off, the valve automatically returns to the closed state, and vice versa, if the valve is originally open, the initial opening state is restored after the air is broken. The double-action is that the valve needs an air source to open, but it cannot be automatically closed after the air is cut off, and it still remains open all the time, and it needs to be inflated again before it can be closed.

Generally speaking, customers who do not have high requirements for leakage choose double-acting pneumatic actuators, and single-acting  actuators  are generally selected in some corrosive media, because these media have relatively high requirements for sealing.