Fire-Lite WFD40EXP

Waterflow Detector

Condition: New
Brand: Fire-Lite
Status: Active
SKU: 80650
Manufacturer Part #: WFD40EXP


Vane-type, explosion-proof waterflow detectors shall be installed on system piping on the drawing and/or as specified herein. Detectors shall be mounted in hazardous locations classified as: Class I, Div. 1 and 2, Groups B, C, D; or Class II, Div. 1 and 2, Groups E, F, G; or Class III, Div. 1 and 2. Detectors shall mount on any clear pipe span of the appropriate nominal size, either a vertical upflow or horizontal run, at least 6˝ from any fittings which may change water direction, flow rate, or pipe diameter or no closer than 24˝ from a valve or drain. Detectors shall have a sensitivity in the range of 4 to 10 gallons per minute and a static pressure rating of 450 psi for 2˝–8˝ pipes. The detector shall respond to waterflow in the specified direction after a preset time delay that is field adjustable. The delay mechanism shall be a sealed mechanical pneumatic unit with visual indication of actuation. The actuation mechanism shall include a polyethylene vane inserted through a hole in the pipe and connected by a mechanical linkage to the delay mechanism. Outputs shall consist of dual SPDT switches (Form C contacts). Two conduit entrances (one of which is a knockout type) for standard fittings of commonly used electrical conduit shall be provided on the detectors. A grounding provision is provided. Enclosures shall be NEMA 4 listed by Underwriters Laboratories Inc. All detectors shall be listed by Underwriters Laboratories Inc. for indoor or outdoor use.

Additional information

Weight 11.5 lbs
Dimensions 6.00 × 9.00 × 6.50 in



Production Status



  • New WFD30-2EXP models install in 2˝ hole sizes
  • Designed and approved to operate in hazardous locations
  • NEMA 4 enclosure rating
  • Sensitivity-setting spring mechanism located outside of explosion environment
  • Sealed retard mechanism
  • Visual switch activation
  • Synchronized activation circuit
  • Field-replaceable terminal block and retard mechanism
  • Only one conduit entrance required for hook-up


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