The Type 3372 pneumatic diaphragm actuator is designed for use with V2001 and 3522 control valves for light industrial applications with integral I/P converter or direction attachment of electro-pneumatic 3725 positioner. This actuator is a linear motion device ideal for valve sizes ranging from 1/2" to 4" globe control valves. The thrust force of the actuator depends on the actuator area, pneumatic supply pressure, spring stiffness, distance traveled, initial compression of the spring, the number of springs internal to the actuator, etc.