Siemens 331-2904

Damper Actuator, Pneu No 4, 4” Stroke, 3-7psi, Integral Pivot Mount, UL Rec F/S

This 331 Number 4 Pneumatic Damper Actuator is UL recognized for fire and smoke applications and 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, integral pivot mounting and a replaceable diaphragm. This actuator has an air connection of ⅛” NPT female with a dual barb elbow fitting for ¼” OD tubing.

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