Siemens 331-2961

Damper Actuator, Pneu No 4, 4” Stroke, 8-13psi, Integ Pivot Mount, UL Rec F/S

331 No. 4 Pneumatic Damper Actuator, UL recognized for fire and smoke applications; rugged, metal-fabricated device provides gradual or positive actuation of HVAC and fire/smoke dampers. 8 to 13 psi, integral pivot mounting, replaceable diaphragm; Air connection of ⅛” NPT female, dual barb elbow fitting for ¼” OD tubing.

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