Siemens 331-3000 Pneumatic Damper Actuator, No.4, 4″ Stroke, 3-7psi, Universal Mount

Siemens 331-3000, Damper Actuator, Pneumatic, Number 4, 4″ Stroke, 3-7psi, Integral Pivot, Pivot Post.

This 331 Number 4 Pneumatic Damper Actuator with integral pivot and pivot post is a rugged, metal-fabricated device that provides gradual or positive actuation of HVAC and fire/smoke dampers. This actuator has a nominal spring range of 3 to 7 psi, a replaceable diaphragm and an air connection of 1/8″ NPT female with a dual barb elbow fitting for 1/4″ OD tubing. Also included is an universal mounting kit that allows fixed or pivot mounting, this kit contains parts for frame mounting.