Siemens 331-2998, Damper Actuator, Pneumatic, Number 4, 4″ Stroke, 8-13psi, High Temp, Clevis and Crank, Fire & Smoke
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 8 to 13 psi.
Actuator Type: Pneumatic
Pneumatic Model: No. 4
Spring Range: 8-13 psi
Ball Joint Connector: No
Clevis: Yes
Mounting Style: Pivot
Pivot: Yes
Pneumatic Bracket: Yes
Positioning Relay: No
Stroke: 4 in
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