FS4-3 Series – General Purpose Liquid Flow Switches

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Manufacturer: MCDONNELL & MILLER

Universal design serves the widest variety of applications including starting or stopping electrically operated equipment such as signal lights, alarms, motors, automatic burners, metering devices and others. Also a replacement for Johnson Controls flow switch Model F61KB-11.

  • Features
  • Specifications
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  • Time delay (5 or 20 seconds)
  • Two SPDT switches to make or break two separate circuits
  • Reinforced paddles
  • Materials of construction suitable for corrosive liquids

Sprinkler service (UL & ULC listed)-Model FS4-3F

  • 1″ (25mm) NPT process connection – BSPT also available
  • Hardened stainless steel bearings minimize friction
  • Sealed Monel bellows
  • Four Monel paddles included: 1″, 2″ , 3″ & 6″ (25, 50, 80, & 150mm) NPT
  • Maximum operating pressure: 150 psi (10.5 kg/cm2)
  • Sensitivity adjusting screw makes flow adjustment easy
  • Maximum temperature: 300°F (149°C)
  • Minimum temperature: (fluid or ambient) 32°F (0°C)
  • Switch: SPDT 125 VA at 120 or 240vac, 50 or 60 cycles snap switch