Siemens 331-4814 DAMPER ACTUATOR, PNEU, NO 3, 2 3/8" STROKE, 8-13 PSI, FIXED BRKT MTG, CLEVISSiemens 331 4814 Damper Actuator, Pneu, No 3, 2 3 8" Stroke, 8 13 psi, Fixed Brkt Mtg, Clevis This 331 Number 3 Pneumatic Damper Actuator with clevis is a rugged, metal fabricated device that provides gradual or positive actuation of HVAC dampers. This actuator has a nominal spring range of 8 to 13 psi, is fixed bracket mounting and has an ozone resistant rolling rubber diaphragm. This actuator has an air connection of 1 8" NPT female with a straight
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