Pneumatic Diaphragm Actuator Control Valve

This actuator is a linear motion device ideal for valve sizes ranging from the micro flow valves to large 20 globe control valves.

Pneumatic diaphragm actuator control valve.

The compressed air is applied to a solid piston contained within a solid cylinder. The importance of positioners is discussed with regard to what they do and why they are required for many applications. Find out about the differences between electric and pneumatic actuators the relationship between direct acting and reverse acting terminology and how this affects a valve s controlling influence. For subsequent discussions the following letters have been assigned to a variety of variables.

It keeps the air in the upper portion of the cylinder allowing air pressure to force the diaphragm or piston to move the valve stem or rotate the valve control element. Control valves need actuators to operate. Piston actuators can be single acting or double acting can withstand higher input pressures and can offer smaller cylinder volumes which can act at high speed. A area of the diaphragm p air pressure k spring.

The type 3271 pneumatic rolling diaphragm actuator is designed for all industrial applications. 1 5 1 basics of actuator sizing in a spring diaphragm actuator any valve position is achieved by making the total force on the stem equal to zero. Valve housing and diaphragm available in various materials and designs surfaces in contact with the product from ra 0 38 µm 1 6 µm optionally electropolished available in all common connection sizes and variants.