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The Powers Controls No. 4 Pneumatic Damper Actuator is a totally enclosed pneumatic piston type actuator designed to operate dampers for ventilating systems, mixing box control, and other applications requiring a large effective diaphragm area and long stroke.

The No. 4 Pneumatic Damper Actuator is recommended for control of outdoor, return air, exhaust, face and bypass, fan discharge, and static pressure control dampers, as well as specialized dampers and air valves found in terminal units such as unit ventilators and mixing boxes.

  • All metal body construction
  • Replaceable, ozone-resistant, EPDM rubber, rolling diaphragm
  • Pivot mounting for extended shaft or frame mounting
  • Fixed bracket mounting
  • Direct front mounting
  • Positioning relay (optional)
  • Forward travel stops (optional)
  • Adjustable hesitation point (hesitation actuator only)
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Product Type:
Spring Range:
3 to 13 psi
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