Siemens 331-4311

Damper Actuator, Pneu No 3, 2-⅜” Stroke, 3-7psi, Integral Pivot, Pivot Post

This 331 Number 3 Pneumatic Damper Actuator with integral pivot and pivot post is a rugged, metal-fabricated device that provides gradual or positive actuation of HVAC dampers. This actuator has a nominal spring range of 3 to 7 psi, has extended shaft mounting and an ozone-resistant rolling rubber diaphragm. This actuator has an air connection of ⅛” NPT female with a straight dual barb fitting for ¼” OD tubing.

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