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Model F10 vane-actuated mechanical flow switch

Magnetrol® flow switches are highly reliable flow control solutions utilized to sense the presence or absence of flow in horizontal pipelines. Model F10 switches are vane actuated for use on gas or liquid flow applications in 2 inch or larger line sizes.

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The product

Mechanical flow switches technology

F10: Force of liquid or gas flow against a vertical flow vane mounted in a line causes the vane to pivot to a horizontal position, moving an attraction sleeve into the field of a switch magnet. This pulls the magnet toward the sleeve and actuates the switch.

F50: The force of liquid flow through a valve body and against a flow disc causes it to lift out of the flow path. The attraction sleeve at the top of the disc assembly moves into the field of a switch magnet, attracting the magnet and actuating the switch.


  • Field adjustable
  • Negligible pressure drop
  • Process pressures to 1000 psig (69 bar)
  • Process temps. to +450°F (+230°C)
  • Actuation on increasing or decreasing flow
  • Standard flow vanes for 2” through 10” flow lines
  • Special sensing elements for non-standard or high flow applications


  • High flow vanes
  • Larger pipe vanes
  • Carbon steel or SST construction.
  • 21-1290 GPM actuation flow rates depeding on material and line size

Operating principle

The actuating vane is magnetically linked to a pivoted electric (or pneumatic) switch, which is isolated from the process by a non-magnetic barrier tube. As the actuating vane moves with an increase in flow, it drives a magnetic sleeve into the field of a permanent magnet located outside the barrier tube which trips the switch. As flow decreases, the actuating vane returns to a vertical position, allowing the magnet and switch assembly to return to the “No Flow” position.


ATEX Ex d, Ex ia
EAC (GOST) Ex d, Ex ia
IEC Ex d, Ex ia
Inmetro Ex d
Korea Ex d

Other approvals are available. Consult factory for more details.

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