Siemens 331-2973, Damper Actuator, Pneumatic, Number 4, 4″ Stroke, 5-10psi, Pivot, Univ Mt Kit, UL Rec Fire & Smoke.
This 331 Number 4 Pneumatic Damper Actuator with integral pivot and pivot post is UL recognized for fire and smoke applications and 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, a replaceable diaphragm and an air connection of 1/8″ NPT female with a dual barb elbow fitting for 1/4″ OD tubing. Also included is an universal mounting kit that allows fixed or pivot mounting, this kit contains parts for frame mounting.
Pneumatic Model: No. 4
Spring Range: 8-13 psi
Stroke: 4 in
Ball Joint Connector: No
Clevis: YES
Mounting Style: Extended Shaft
Pivot: Yes
Pneumatic Bracket: Yes
Positioning Relay: No
Dimensions (W x H x D): 4.65 x 7.76 x 20.83 in
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