3825OhioAvenue•St.Charles,IL60174

Phone:800-SENSOR2•Fax:630-377-6495

©2009 System Sensor.

Product specifications subject to change without notice. Visit systemsensor.com for

current product information, including the latest version of this data sheet.

A05-1030-006•2/09•#1925

Ordering Information

Model Number

Pipe Size

Hole Size

Weight

WFD20EXP

2˝

1¼˝

10.6 lbs.

WFD25EXP

2½˝

1¼˝

10.7 lbs.

WFD30-2EXP

3˝

2˝

10.9 lbs.

WFD35EXP

3½˝

1¼˝

11.2 lbs.

WFD40EXP

4˝

2˝

11.5 lbs.

WFD50EXP

5˝

2˝

12.1 lbs.

WFD60EXP

6˝

2˝

12.5 lbs.

WFD80EXP

8˝

2˝

13.5 lbs.

Accessories

A3008-0

Replacement retard mechanism for all sizes 2˝–8˝

A77-01-02

Replacement terminal block

WFDRK

Replacement hardware kit (contains tamper screws, wrench and conduit plug)

WFDEXP Series Specifications

Architectural/Engineering Specifications

Vane-type,explosion-proofwaterflowdetectorsshallbeinstalledonsystempipingonthedrawingand/orasspecifiedherein.Detectorsshallbemounted

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.

Physical/Operating Specifications

Hazardous Locations Classifications

Class I, Div 1 and 2, Groups B, C, D

Class II, Div 1 and 2, Groups E, F, G

Class III, Div 1 and 2

Static Pressure Rating

450 psi (max.)

Triggered Threshold Bandwidth (Flow Rate)

4 to 10 GPM

Maximum Surge

18 Feet Per Second (FPS)

Contact Ratings

Two sets of SPDT (Form C)

10.0A@125/250VAC

2.5 A @ 24 VDC

Compatible Pipe

Steel water pipe, schedule 10 through 40

Conduit Entrances

Two openings for ½˝ conduit

Operating Temperature Range

32°F to 120°F (0°C to 49°C)

Enclosure Rating

NEMA4–suitableforindoor/outdooruse

Service Use

Automatic Sprinkler: NFPA-13

National Fire Alarm Code: NFPA-72

Overall Dimensions

6˝H × 9˝L × 6.5˝W

Weight

(see Ordering Information)

Warranty

3 years

U.S. Patent Numbers

5,213,205