Siemens
Item ID: 331-2961
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 1/8" NPT female, dual barb elbow fitting for 1/4" OD tubing..