Siemens 331-2905, Damper Actuator, Pneumatic, Number 4, 4″ Stroke, 3-7 psi, Integral Pivot Mount.
This 331 Number 4 Pneumatic Damper Actuator 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 7 psi, integral pivot mounting and a replaceable diaphragm. This actuator has an air connection of 1/8″ NPT female with a dual barb elbow fitting for 1/4″ OD tubing.
Actuator Type: Pneumatic
Pneumatic Model: No. 4
Spring Range: 3-7 psi
Ball Joint Connector: No
Clevis: No
Mounting Style: Pivot
Pivot: Yes
Pneumatic Bracket: No
Positioning Relay: No
Stroke: 4 in
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