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Fisher™ M Series Handwheel Gear Actuator
Fisher M series handwheel gear actuators are totally enclosed, weatherproof, worm gear actuators used for reliable manual operation with Fisher A11, A31A, and 8560 high performance Butterfly valves.
The M series actuator consists of a body housing, cover, worm gear, input shaft, and handwheel and the housing is grease-packed.

Fisher Valve Handwheel Operation

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Fisher™ M Series Handwheel Gear Actuator


Quarter-turn, Manual
Control Type
On/Off, Positioning
Operating Temperature
Standard Temperature
Power Source
Process Control
On/Off, Positioninging, Positioning
Valve Type
Ball Valve, Butterfly Valve, Eccentric Plug Valve, Triple Offset Valve
Other Configurations
Contact your local Emerson business partner or sales office to learn about additional specifications or options for this product.


  • Rugged construction provides stability and corrosion resistance. The unit is totally enclosed for weatherproof operation.
  • Two adjustable stops are located in the housing for correct adjustment of disk position. The actuator is inherently self-locking, unless subjected to high vibration.
  • Provides for five degrees of overtravel in both directions for precise positioning of the valve disk.