The valve drive device is an actuator used to realize the opening and closing operation of the valve. According to the movement of the output shaft, the valve drive device can usually be divided into three main types: multi-turn rotary, partial rotary and linear reciprocating.

The multi-turn rotary valve drive device is suitable for valves that require multiple turns to complete the opening and closing action, such as gate valves and globe valves. It realizes multi-turn rotation of the valve stem by worm gear or gear transmission.

Partial rotary valve drives are suitable for valves whose stem can be opened and closed within one turn, such as ball valves and butterfly valves. This type of device controls the rotation Angle of the valve stem through a limiting structure, so as to achieve partial rotation.

Linear reciprocating valve drive device is suitable for valve stem only need to do linear reciprocating motion to complete the opening and closing of the valve, such as solenoid valve. It drives the linear reciprocation of the valve piece through the reciprocating movement of the rod.

Common valve drive device power sources include manual, pneumatic, hydraulic and electric. Manual operation is suitable for large valves, while pneumatic and hydraulic drives are usually used for small and medium-sized valves due to their compact structure. The electric drive has the advantage of remote control and automation. In addition, there are some special drive types, such as gas-hydraulic linkage and electro-hydraulic linkage. In recent years, electromagnetic drive devices have become more and more popular because they respond quickly and do not require complex transmission mechanisms.

Through the comprehensive application of different types of valve driving devices, it is possible to achieve fine control of various types of valves to meet the automation needs of the process. Reasonable selection of the appropriate drive type plays an important role in ensuring the smooth progress of the production process.