Siemens 331-2973


Linear Pneumatic Actuator, Pivot

331-2973 512796
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Linear Pneumatic Actuator, Pivot


ItemLinear Pneumatic Actuator
Operating PSI Range8 to 13
Max. Air Pressure30 psi
Nominal Spring Range8 to 13 psi
Mounting TypePivot
Net Force Exerted @ 0 PSI88 lb.
Net Force Exerted @ 18 PSI55 lb.
ProvidesGradual or Positive Actuation of Dampers
For Use With Medium to Large Dampers
Includes Pivot Post and Mounting Plate
Weight 13.500000


Linear Pneumatic Actuator, Operating PSI Range 8 to 13, Max. Air Pressure 30 psi, Stroke 4 In., Nominal Spring Range 8 to 13 psi, Mounting Type Pivot, Net Force Exerted @ 0 PSI 88 lb., Net Force Exerted @ 18 PSI 55 lb., Length 20-1/2 In., Width 4-3/4 In., Height 7-1/2 In., Provides Gradual or Positive Actuation of Dampers, For Use With Medium to Large Dampers, Includes Pivot Post and Mounting Plate

Pneumatic Actuators
  • Proportional control of dampers in either independent or sequence operation. KMC models are for use on VAV terminals, small dampers, and valves. 3/16" fitting for 1/4" tubing, 1/2" mounting hole diameter. Operating temperature limit: -20 to 180 F. Honeywell 3UC22, 3UC23, 3UC24 have no bracket or ball joint, and are for direct replacement. Siemens models have pivot mounting. Johnson Controls models respond to a pneumatic controller or electro-pneumatic transducer, and are used with dampers up to a maximum area of 16 sq. ft. for proportional volume control and 25 sq. ft. for 2-position actuation.

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