Powers Controls 331-2973 Linear Pneumatic Actuator,Pivot

The Siemens 331 Number 4 Pneumatic Damper Actuator with integral pivot and pivot post is UL recognized for fire and smoke applications. It is a rugged, metal-fabricated device that provides gradual or positive actuation of H-Vac and fire/smoke dampers. This actuator has a nominal spring range of 8 to 13 psi, a replaceable diaphragm and an air connection of 1/8 NPT female with a dual barb elbow fitting for 1/4 OD tubing. Also included is a universal mounting kit that allows fixed or pivot mounting; this kit contains parts for frame mounting. The Number 4 Pneumatic Damper Actuator is recommended for control of outdoor, return air, exhaust, face and bypass, fan discharge and static pressure control dampers, as well as specialized dampers and air valves found in terminal units such as unit ventilators and mixing boxes.