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Characteristics of pneumatic valves

2015-08-09

Pneumatic valves and hydraulic valves are powered by air, water or oil at a certain pressure, and use the movement of cylinders (or hydraulic cylinders) and pistons to drive the valves. Generally, the pneumatic air pressure is less than 0.8MPa, and the hydraulic pressure or hydraulic pressure is 2.5MPa ~ 25MPa. Such as used to drive the diaphragm valve; rotary gas, liquid drive device used to drive the ball valve, butterfly valve or plug valve. Hydraulic device driving force, suitable for driving large diameter valve. For example, when used to drive plug valves, ball valves and butterfly valves, the reciprocating motion of the piston must be converted into rotary motion. In addition to the use of cylinder or hydraulic cylinder piston to drive, as well as the use of pneumatic film drive, because of its stroke and driving force is small, it is mainly used for regulating valve.