Siemens 331-2963

Damper Actuator, Pneu No 4, 4” Stroke, 8-13psi, Front Mount

This 331 Number 4 Pneumatic Damper Actuator with non-pivot mounting screws 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 8 to 13 psi, is front mounted and has 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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