Siemens 331-2917, Damper Actuator, Pneumatic, Number 4, 4″ Stroke, 5-10psi, Front Mount, UL Fire & Smoke
This 331 Number 4 Pneumatic Damper Actuator with non-pivot mounting screws 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 5 to 10 psi, is front mounted and has 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: 5-10 psi
Ball Joint Connector: No
Clevis: No
Mounting Style: Front
Pivot: No
Pneumatic Bracket: No
Positioning Relay: No
Stroke: 4 in
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