Dwyer V8 Series Flotect Vane Operated Flow Switch
Dwyer V8 Series Flotect Vane Operated Flow Switch

Dwyer V8 Series Flotect Vane Operated Flow Switch

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Dwyer V8 Series Flotect Vane Operated Flow Switches are ideal for protecting unattended equipment from damage or loss of production. This Series is available for installation in a 1 to 6″ pipe with operating pressures are up to 150 psig (10 bar) and temperatures of 212°F (100°C).

Paddle flow switches or vane sensors with an electrical contact output are at a specific flow rate. Dwyer flow switches are economical and reliable. Applications include proof of boiler flow, air conditioning, controlling of dampers according to flow, and protecting pumps, motors, and other equipment against low or no flow.

Dwyer V8 Series Flotect Features

  • UL is recognized as an industrial motor controller per UL standard 508, suitable for mounting in a protected environment
  • Magnetically actuated switching design gives superior performance with a free-swinging vane that attracts a magnet within the switch body, actuating a snap switch with no bellows, springs, or seals to fail
  • Leak proof body and vane are constructed of tough durable polyphenylene sulfide which has excellent chemical resistance
  • A full-size trimmable vane is provided with molded-in graduations


  • Chemical processing
  • Air conditioning
  • Refrigeration
  • Heating systems
  • Cooling lines
  • Machinery
  • Liquid transfer systems
  • Water treatment
  • Food processing
  • Machine tools
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Dwyer V8 Series Flotect Specification

Service Compatible gases or liquids.
Wetted Materials Vane and Body: Polyphenylene Sulfide (PPS); Pin and spring: 316 SS or Inconel®; Magnet: Ceramic 8.
Temperature Limit 212°F (100°C).
Pressure Limit 150 psig (10 bar).
Enclosure Rating General purpose; WP/WP2 option is weatherproof.
Switch Type SPDT snap switch; MV option: SPDT gold contact snap switch.
Electrical Rating 5 A @ 125/250 VAC, 5 A resistive, 3 A inductive @ 30 VDC. MV option: 1 A @ 125 VAC, 1 A resistive, 0.5 A inductive @ 30 VDC.
Electrical Connections 18 AWG 18″ (460 mm) long.
Conduit Connection 1/2″ male NPT, 1/2″ female NPT on WP and WP2.
Process Connection 1″ male NPT.
Mounting Orientation Actuation/deactivation flow rates are based on horizontal pipe run and are nominal values. Unit cannot be used with vertical downflow.
Set Point Adjustment Vane is trimmable.
Weight 4.5 oz (0.13 kg).
Agency Approvals CE, cURus.

Download Data Sheet: Series V8 Flotect® Vane Operated Flow Switch

Ref: dwyer-inst.com

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