Siemens 331-4314, Damper Actuator, Pneumatic, Number 3, 2-3/8″ Stroke, 3-7 psi, Fixed Bracket Mount, 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 3 to 7 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 dual barb fitting for 1/4″ OD tubing.
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