Siemens 331-3018

Damper Actuator, Pneu No 4, 4” Stroke, 3-13psi, Fixed Mount Plate

This 331 Number 4 Pneumatic Damper Actuator with a ball joint connector 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 13 psi, a fixed mounting plate and a replaceable diaphragm. This actuator has an air connection of ⅛” NPT female with a dual barb elbow fitting for ¼” OD tubing.

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