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Siemens No. 3 Pneumatic Actuator

Pneumatic Actuator
No. 3

Designed with a 2-3/8-inch (60 mm) stroke, the No. 3 Pneumatic Actuator is a rugged, metal-fabricated device that provides gradual or positive actuation of HVAC dampers. The actuator is available in a variety of spring ranges for energy optimizing and sequencing with other devices.

• Ozone-resistant rolling rubber diaphragm
• Variety of installation options, including:
– Fixed bracket mounting
– Direct front mounting
– Pivot mounting for extended shaft
• Available with positioning relay

Select a link under the "item" tab below to order.

Cat #Mounting StyleTypeDescriptions
331-4310Front3-7 psi (21-48 kPa)Actuator
331-4313Fixed3-7 psi (21-48 kPa)Actuator, Bracket
331-4312Pivot3-7 psi (21-48 kPa)Actuator, Integral Pivot
331-4311Extended Shaft3-7 psi (21-48 kPa)Actuator, Integral Pivot with pivot post. Mounted on plate for extended shaft with Shaft Clevis and Crank for 3/8” (10 mm), 7/16” (11 mm), 1/2” (13 mm) diameter shaft.
331-4810Front8-13 psi (55-90 kPa)Actuator
331-4813Fixed8-13 psi (55-90 kPa)Actuator, Bracket
331-4812Pivot8-13 psi (55-90 kPa)Actuator, Integral Pivot
332-4811Extended Shaft with Positioning Relay8-13 psi (55-90 kPa)Actuator, Integral Pivot with pivot post. Mounted on plate for extended shaft with Clevis and Crank for 3/8” (10 mm), 7/16” (11 mm), 1/2” (13 mm) diameter shaft.


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