Siemens 331-3000

Damper Actuator, Pneu No 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 ⅛” NPT female with a dual barb elbow fitting for ¼” OD tubing. Also included is an universal mounting kit that allows fixed or pivot mounting, this kit contains parts for frame mounting.

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