Siemens 331-3013, Damper Actuator, Pneumatic, Number 6, 4″ Stroke, 3-13psi, Integral Pivot, Extended Shaft.
This 331 Number 6 Pneumatic Damper Actuator with integral pivot and pivot post 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, is mounted on a plate which allows extended shaft mounting and has a replaceable diaphragm. This actuator has a 1/8″ NPT female air connection and parts for frame mounting.
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