Regulating valves are usually composed of an electric or pneumatic actuator and a valve body.

In the field of industrial automation process control, the regulating valve receives the control signal output by the regulating control unit and uses power operation to change the final control element of process parameters such as medium flow, pressure, temperature and liquid level.

There are mainly two types of straight stroke: straight through single seat and straight through double seat. The latter has the characteristics of large flow capacity, small unbalanced force, and stable operation, so it is usually particularly suitable for situations with high flow rate, high pressure drop, and low leakage