331-2905 | Damper Actuator, Pneumatic, Number 4, 4" Stroke, 3-7 psi, Integral Pivot Mount | Siemens

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 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 1/8" NPT female with a dual barb elbow fitting for 1/4" OD tubing.