Siemens 331-4811, Damper Actuator, Pneumatic, No.3, 2-3/8″ Stroke, 8-13psi, Integral Pivot, Pivot Post.
This 331 No.3 Pneumatic Damper Actuator with integral pivot and pivot post is a rugged, metal-fabricated device that provides gradual or positive actuation of HVAC dampers. This actuator has a nominal spring range of 8 to 13 psi, has extended shaft mounting and an ozone-resistant rolling rubber diaphragm. This actuator has an air connection of 1/8″ NPT female with a straight dual barb fitting for 1/4″ OD tubing.
Actuator Type: Pneumatic
Pneumatic Model: No. 3
Spring Range: 8-13 psi
Ball Joint Connector: No
Clevis: Yes
Mounting Style: Extended Shaft
Pivot: Yes
Pneumatic Bracket: No
Positioning Relay: No
Stroke: 2-3/8″
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