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These actuators are used for proportional control of variable volume terminal units, mixing boxes, and small to medium sized dampers. They are available in various operating ranges for either independent operation or sequence operation with other actuators. The MP909E has an optional adjustable stroke feature. The MP909H includes a positive positioner. Replacement devices are available for Johnson, Powers, Robertshaw, Barber-Colman, and older Honeywell actuator models.

  • Rolling diaphragm operated.
  • Low friction shaft bearing.
  • Close tolerance on operating range and stroke.
  • Non-overlapping spring ranges for sequencing.
  • Corrosion resistant materials.
  • Reliable long life.
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Product Type:


Actuator Type:


Temperature Range (F):

-28°F to 160°F

Actuator Spring Range:

5 to 10 psi

Fail Safe Mode:

Spring Return

Air Connections:

Dual Barbed fitting for 5/32" or 1/4" O.D. tubing



Max Pressure (PSI):


Air Connections:

1/8" NPT


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