Water Flow Detector

Two-inch conduit openings in new wfd30-2 models
ul listed models are nema 4 rated
sealed retard mechanism immune to dust and other contaminantsvisual switch activation
field replaceable retard mechanism and spdt switches
rugged, dual spdt switches enclosed in a durable terminal block
accommodates up to 12 awg wire
designed for both indooroutdoor use
100 percent synchronization activates both alarm panel and local bell
tamper resistant cover screws
engineering specifications
vane-type waterfl ow detectors shall be installed on system piping as designated on the drawing andor as specifi ed herein. 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 fi ttings 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 specifi ed direction after a preset time delay which is field adjustable. The delay mechanism shall be a sealed techanical 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 for standard fi ttings of commonly used electrical conduit shall be provided on the detectors. A grounding provision is provided. Unless noted, enclosures shall be nema 4 listed by underwriters laboratories inc. All detectors shall be listed by underwriters laboratories inc. For indoor or outdoor use.
static pressure rating
450 psi*
maximum surge
18 feet per second (fps)
triggering threshold bandwidth (flow rate)
4-10 gpm
conduit entrances
two openings for ½ conduit, one open one knock out type
contact ratings
two sets of sp