Home > Series FS-2 vane flow switches from Dwyer Instruments

Series FS-2 vane flow switches from Dwyer Instruments

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Series FS-2 vane flow switches available from Dwyer Instruments offer an economical solution for proving flow in boilers, hot water heaters and chillers.

Featuring an aluminium weatherproof housing for outdoor installation, Series FS-2 vane flow switches consist of field adjustable vane layers and a set point adjustment screw that allow custom set points to be tailored for the application. Paddles are adjustable to fit 1˝ to 8˝ size pipes.

Series FS-2 vane flow switches are ideal for use in ‘flow or no flow’ applications in cold and hot water systems.

Key features of Series FS-2 vane flow switches:

  • Field adjustable paddle
  • Field adjustable set point
  • Weatherproof construction
  • Wetted materials include tin bronze bellow, stainless steel vane and forged brass body
  • Temperature limit: 110ºC
  • Pressure limit: 10 bar
  • Enclosure rating: NEMA 4 (IP64)
  • Switch type: SPDT snap switch
  • Electrical rating: 10A res, 3A ind @ 250 VAC
  • Electrical connection: Cable gland with attached wire leads or optional conduit connection
  • Process connection: 1˝ male NPT or BSPT
  • Mounting orientation: Vertically on horizontal pipe runs
  • Set point adjustment: Four vane combinations and an adjustment screw
  • Enclosure: Die-cast aluminium alloy
  • Weight: 0.8kg
  • CE approved

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