The 87/88 Series is a pneumatic spring diaphragm actuator. The multiple spring design configuration provides four standard spring ranges are achieved by varying spring quantity and placement. A molded rolling diaphragm and deep cases reduce area change, resulting resulting in a linear relationship between travel and air pressure.

Actuator Type

87 Air to Close (Extend Stem)

88 Air to Open (Retract Stem)

The Masoneilan Type 87/88 actuator is used in a wide range of globe control valve applications.