The structure of the control valve

Executive body
The executing agency is the controller output signal conversion device for controlling the valve stem linear displacement or valve shaft angular displacement. Actuator
Configuration provides the driving force or the driving torque is used to overcome the imbalance force, the valve of the pressing force and frictional force, so that the amount of displacement of the input signal
The proportional change.angle seat valves
Detailed description of pneumatic diaphragm actuator pneumatic single seat control valve
Pneumatic diaphragm actuator is the most common implementing agencies. Pneumatic diaphragm actuator has simple structure, reliable action, easy maintenance, low cost, and widely used. It is divided into the action and reaction of two performed. Role of the implementing agencies in the input signal increases, putting outward displacement; reaction actuator displacement when the input signal increases, putting inward.
When the input signal increases, to generate a thrust in the thin film diaphragm, to overcome the biasing force of the spring, the plunger displacement, the displacement directions outwardly. Therefore, called the action actuator is. On the contrary, the input signal connector next film cover signal increases, putting displacement inward, shrink film box, called the reaction actuator.3 way air valve