331-2911 | Damper Actuator, Pneu No 4, 3" Stroke, Unit Ventilator, 3-7psi | Siemens (OBSOLETE)

DISCONTINUED MODEL, CONTACT TECHNICAL SUPPORT FOR REPLACEMENT OPTIONS

Damper Actuator, Pneu No 4, 3" Stroke, Unit Ventilator, 3-7psi

This 331 Number 4 Pneumatic Damper Actuator has a 3" stroke for unit ventilator 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, a non-pivot mounting bracket and a replaceable diaphragm. This actuator has an air connection of 1/8" NPT female with a dual barb elbow fitting for 1/4" OD tubing.