The difference of Pneumatic and hydraulic sanitary valves in the drive
Pneumatic and hydraulic sanitary valves were operated by a certain pressure of air, water, power, used cylinder and piston movement to drive the health-class valves, the general pneumatic air pressure is less than 0.8MPa, hydraulic or hydraulic pressure is between 2.5 MPa and 25 MPa.
It can be used to drive the sanitary check valves, sanitary diaphragm valve; rotary gas and liquid ball valves, plug valves or butterfly valves and other valves. The driving force of the hydraulic device is large, and it is suitable for driving large diameter valves.
If used to drive the plug valve, ball valve and butterfly valve, you must use the reciprocating motion of the piston to change the surface rotary motion. In addition to the use of cylinder or cylinder piston to drive, there are pneumatic film driven, because its travel and driving force is small, it is mainly used to adjust the sanitary valves.