Air Operator Sizing Data

Air to Open Sizing Data for Piston and Diaphragm Operators


When using pneumatic valve operators it is important to know the design requirements. These tables provide operating limits as well as flow coefficients and stem travel.


  • Required operator air pressure at various system pressures.

  • Maximum operating pressure.

  • Stem travel.

  • Flow coefficients.

  • Spring compression.

These tables are used when design systems and specifying air actuated valves. The tables show the air pressure required to open valves, at different operating pressures, and for the different size operators. .

Air Operator Sizing Data