Air-operated valve

An air-operated valve is a type of power operated valve that uses air pressure against a piston or diaphragm to produce linear or circular movement to operate a valve. Types are 2-way, 3-way and 4-way. The 2 way air-operated valves can be either normally closed or normally opened.[1]

Modulating control valves each with 4-20mA I to P converter linked to pneumatic a valve positioner controlling a diaphragm actuator

See also

References
  1. "Engineering information, Air valves" (PDF). pp. 455–456. Archived from the original (PDF) on 25 February 2015.
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