According to the driving method, it is divided into automatic valve type, power driven valve type and manual valve type:
An automatic valve is a valve that does not require external force to drive, but relies on the energy of the medium itself to actuate the valve. Such as safety valves, pressure reducing valves, traps, check valves, automatic regulating valves, etc.
Compressed air driven valve. Hydraulic valve: A valve that is driven by a liquid pressure such as oil.
In addition, there are combinations of the above several driving methods, such as gas-electric valves.
Manual valve: The manual valve uses manpower to manipulate the valve action by means of the hand wheel, handle, lever and sprocket. When the valve opening and closing torque is large, a gear or worm gear reducer can be provided between the hand wheel and the valve stem. If necessary, you can also use the universal joint and the drive shaft for remote operation.
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