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Sprinkler
SyStemS
monitoring
WFDEXP Explosion Proof Waterflow Detector
Models Available WFD20EXP WFD25EXP WFD30-2EXP WFD35EXP WFD40EXP WFD50EXP WFD60EXP WFD80EXP
WFD40EXP
Replacement Parts A77-01-02 A3008-00 WFDRK TerminalBlock RetardMechanism HardwareKit
Product Overview 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 System Sensor's WFDEXP series is designed to handle extreme conditions. These units are ideal for installation in hazardous locations classified as follows:
Class I, Groups B, C, D, Division 1 & 2 Class II, Groups E, F, G, Division 1 & 2 Class III, Division 1 & 2
Robust Construction. The WFDEXP series consists of a rugged, NEMA 4
rated cast aluminum housing. Designed for both indoor and outdoor use, the WFDEXP series operates across a wide temperature range, from 32F to 160F. Inside, two sets of SPDT (Form C) synchronized switches are enclosed in a rugged terminal block, to assure reliable performance.
Reliable Performance. The WFDEXP series offers unique features that assure
greater operational reliability. By housing the spring mechanism separately from the explosion environment, the sensitivity of the adjustment spring and the detector is protected at all times. Adding to the WFDEXP's reliability is its sealed retard mechanism, which prevents contamination by dust and dirt when the cover is removed.
Simplified Operation. Like all System Sensor waterflow detectors, the WFDEXP
series is designed to ease installation. With its visible switch activation, the WFDEXP's retard timing can be verified, even during noisy conditions.
E200116 C169
44-00-E
3006195
Engineering Specifications
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 which 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.
Standard Specifications
HazardousLocationsClassifications ClassI,Div1and2,GroupsB,C,D ClassII,Div1and2,GroupsE,F,G ClassIII,Div1and2 StaticPressureRating 450psi(max) TriggeredThresholdBandwidth(FlowRate) 4to10GPM MaximumSurge 18FeetperSecond(FPS) ContactRatings TwosetsofSPDT(FormC) 10.0A@125/250VAC 2.5A@24VDC CompatiblePipe Steelwaterpipe,schedule10through40 Weight WFD20EXP WFD25EXP WFD30-2EXP WFD40EXP WFD50EXP WFD60EXP WFD80EXP 10.6lbs. 10.7lbs. 10.9lbs. 11.5lbs. 12.1lbs. 12.5lbs. 13.5lbs. EnclosureRating NEMA4-suitableforindoor/outdooruse OverallDimensions 6Hx9Lx6.5W Ser viceUse AutomaticSprinkler: NationalFireAlarmCode: Warranty 3years U.S.PatentNos. 5,213,205;4,782,333;3,845,259 NFPA-13 NFPA-72
ConduitEntrances Twoopeningsfor 12conduit OperatingTemperatureRange 32Fto120F(0Cto49C)
Ordering Information
ModelNumber WFD20EXP WFD25EXP WFD30-2EXP WFD35EXP WFD40EXP WFD50EXP WFD60EXP WFD80EXP PartNumber A3008-0 A77-01-02 WFDRK PipeSize 2 212 3 312 4 5 6 8 Description ReplacementRetardMechanismforallsizes2-8 ReplacementTerminalBlock ReplacementHardwareKit(containstamperscrews,wrench,andconduitplug) HoleSize 114 114 2 114 2 2 2 2
System Sensor Sales and Service
System Sensor Headquarters 3825OhioAvenue St.Charles,IL60174 Ph:800-SENSOR2 Fx:630/377-6495 www.systemsensor.com System Sensor Canada Ph:905.812.0767 Fx:905.812.0771 System Sensor Europe Ph:44.1403.276500 Fx:44.1403.276501 System Sensor in China Ph:86.29.8832.0119 Fx:86.29.8832.5110 System Sensor in Singapore Ph:65.273.2230 Fx:65.273.2610 System Sensor - Far East Ph:85.22.191.9003 Fx:85.22.736.6580 System Sensor - Australia Ph:613.54.281.142 Fx:613.54.281.172 System Sensor - India Ph:91.124.637.1770x.2700 Fx:91.124.637.3118 System Sensor - Russia Ph:70.95.937.7982 Fx:70.95.937.7983
(c) 2003SystemSensor.Thecompanyreservestherighttochangeproductspecificationswithoutnotice.
A05-1030-004*10/03*#1125

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