Ordering Information

ModelNumber

PipeSize

HoleSize

WFD20EXP

2″

WFD25EXP

WFD30-2EXP

3″

2″

WFD35EXP

WFD40EXP

4″

2″

WFD50EXP

5″

2″

WFD60EXP

6″

2″

WFD80EXP

8″

2″

PartNumber

Description

A3008-0

ReplacementRetardMechanismforallsizes2″–8″

A77-01-02

ReplacementTerminalBlock

WFDRK

ReplacementHardwareKit(containstamperscrews,wrench,andconduitplug)

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

System Sensor Sales and Service

©2003SystemSensor.Thecompanyreservestherighttochangeproductspecificationswithoutnotice.

A05-1030-004•10/03•#1125

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

10.6lbs.

WFD25EXP

10.7lbs.

WFD30-2EXP

10.9lbs.

WFD40EXP

11.5lbs.

WFD50EXP

12.1lbs.

WFD60EXP

12.5lbs.

WFD80EXP

13.5lbs.

ConduitEntrances

OperatingTemperatureRange

32°Fto120°F(0°Cto49°C)

EnclosureRating

NEMA4–suitableforindoor/outdooruse

OverallDimensions

6″H×9″L×6.5″W

ServiceUse

AutomaticSprinkler:

NFPA-13

NationalFireAlarmCode:

NFPA-72

Warranty

3years

U.S.PatentNos.

5,213,205;4,782,333;3,845,259

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 appropri-

ate nominal size, either a vertical upflow or horizontal run, at least 6″ from any fittings which may change water direc-

tion, 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 polyeth-

ylene 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 pro-

vided. Enclosures shall be NEMA 4 listed by Underwriters Laboratories Inc. All detectors shall be listed by Underwriters

Laboratories Inc. for indoor or outdoor use.

Engineering Specifications