Siemens Building Technologies 331 Catalog Page
Large Capacity Pneumatic Actuator
331
331 Large Capacity Pneumatic Actuator.
Description
Designed to develop very high thrust, the 331 Large
Capacity Pneumatic Actuator has the capacity to handle
heavy loads.
Features
• Maximum 30 psi (207 kPa) inlet pressure
• All mounting hardware included
• Adjustable start point
• Adjustable span
Applications
The 331 Large Capacity Pneumatic Actuator controls
large dampers and equipment that requires high
operating thrust.
Caution
Actuator cannot be used when spring return to fail safe
position is required.
B-47
Damper Actuators
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Large Capacity Pneumatic Actuator Specifications
B-48
Air Supply Pressure ...................................................... 25 psi (172 kPa)
Max. Pressure ................................................................ 30 psi (207 kPa)
Temperature Range
Operating......................................................... 50 to 140°F (10 to 60°C)
Storage ......................................................-20 to +160°F (-29 to +71°C)
Effective Piston Area .................................................. 19.6 in.2 (126 cm2)
Stroke ................................................................................... 7-in. (18 cm)
Span (adjustable) ............................................. 3 to 12 psi (21 to 83 kPa)
Large Capacity Pneumatic Actuator
Product Ordering
Description Part No.
Large Capacity Pneumatic Actuator 331-2882
Accessories & Service Kits
Dimensions
Response ....................................................................... 0.5 psi (3.4 kPa)
Torque Rating (90° rotation)
with 25 psi (172 kPa) air supply ...............................130 lb.-ft. (176 Nm)
Spring Start Point (adjustable) ....................... 3 to 10 psi (21 to 69 kPa)
Mounting ...........................................................................................Pivot
Air Connection ........................................................................... 1/8" NPT
Shipping Weight ............................................................35.0 lb. (16.0 kg)
B-49
Damper Actuators
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Dimensions shown in inches (mm).
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