331-2909 | Damper Actuator, Pneu, Number 4, 4" Stroke, Hesitation, Integral Pivot Mount | Siemens

Damper Actuator, Pneu, Number 4, 4" Stroke, Hesitation, Integral Pivot Mount

This 331 Number 4 Pneumatic Damper Actuator is a rugged, metal-fabricated device that provides gradual or positive actuation of HVAC and fire/smoke dampers. This hesitation model actuator has a nominal spring range of 2 to 3 and 8 to 13 psi, integral pivot mounting and provides minimum ventilation without separate damper/actuator. This actuator has an air connection of 1/8" NPT female with a dual barb elbow fitting for 1/4" OD tubing.