According to the different flow direction, the control valve can be divided into flow to open type and flow to close type. Flow to open type: The force of the medium pushes the plug of the valve away from the seat sealing surface (the flow direction of the medium promotes the opening of the valve). Flow to close type: The force of the medium pushes the plug of the valve close to the seat sealing
The Sliding-Stem Control Valves are the most commonly used type of control valves. The main reasons for its wide use are as follows: 1. High adjustment accuracy, it can provide a variety of different types of flow characteristics for selection. 2. Especially suitable for high pressure drop liquid and gas applications, with mature anti-cavitation and noise reduction technology. 3. The corr
According to the structure of the valve trim, the control valve can be divided into unbalanced trim and balanced trim. Single seated control valves are typical unbalanced control valves, cage guided control valves are typical balanced control valves.
A control valve consists of a valve body, actuator, positioner, and accessories. The valve body part is the regulating part of the control valve. It directly contacts the medium, the actuator drives the plug movement to change the throttle area between the plug and the seat to achieve the purpose of adjusting the process parameters (pressure, flow, temperature). The actuator(Pneumatic, Electric
