Siemens
Item ID: 331-2968
This 331 Number 4 Pneumatic Damper Actuator has a clevis and clevis pin for use with frame mounting accessory 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 8 to 13 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..