Watts 709DCDA User Manual

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For Non-Health Hazard Applications

ES-709DCDA

Job Name

Job Location

Engineer

Approval

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Series 709DCDA

Double Check Detector Assemblies

Sizes: 3" – 10" (80 – 250mm)

Series 709DCDA Double Check Detector Assemblies are designed exclusively for use in accordance with water authority containment requirements. It is mandatory to prevent the reverse flow of fire protection system substances, i.e. glycerin wetting agents, stagnant water and water of non-potable quality from being pumped or siphoned into the potable water line.

Benefits: Detects leaks . . . with emphasis on the cost of unaccountable water; incorporates a meter which allows the water utility to:

• detect leaks underground that historically create great annual cost due to waste.

• provide a detection point for unauthorized use. It can help

locate illegal taps.

Modular check design concept facilitates maintenance and assembly access. All sizes are standardly equipped with resilient seated OSY shutoff valves,

⁄8" x 3⁄4" (16 x 19mm) meter and ball type test cocks.

Contractor

Approval

Contractor’s P.O. No.

Representative

709DCDAOSY

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Check Assembly

Module

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Test Cock

Cover

Features

• Body construction fused epoxy coated cast iron

• Replaceable bronze seats

• Maximum flow at low pressure drop

• Compact for economy combined with performance

Design simplicity for easy maintenance

•

• Furnished with

• No special tools required for servicing

⁄8" x 3⁄4" (16 x 19mm) bronze meter

Specifications

A Double Check Detector Assembly shall be installed on fire protection systems when connected to a potable water sup ply. Degr authority having jurisdiction. The unit shall be a complete assembly including UL listed resilient seated OSY shutoff valves and test cocks. The unit shall be UL/FM approved with UL/FM approved OSY shutoff valves. The auxiliary line shall consist of an approved backflow preventer and water meter. The assembly shall meet the basic requirements of ASSE 1048; AWWA Std. C510 for Double Check Valves. Approved by the Foundation for Cr Research at the University of Southern California. Assembly shall be a Watts Regulator Company Series 709DCDA.

ee of hazard present is determined by the local

oss-Connection Control and Hydraulic

Seat

Disc

Check Assembly Module

Features a modular design concept which facilitates complete maintenance and assembly by retaining the spring load.

First and second check valve spring modules are not interchangeable.

WattsBox Insulated Enclosures.

For more information, send for literature ES-WB.

IMPORTANT: INQUIRE WITH GOVERNING AUTHORITIES

Now Available

FOR LOCAL INSTALLATION REQUIREMENTS

Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact W out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

atts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-

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Materials

Body: Epoxy coated cast iron Seat: Bronze Disc Holder: Bronze Trim: Stainless steel Check Valve Discs: Rubber Test Cocks: Bronze

Pressure – Temperature

Temperature Range: 33˚F – 110˚F (0.5˚ – 43˚C) continuous, 140˚F (60˚C) intermittent

Maximum Working Pressure: 175psi (12.1bar)

Standards

AWWA Standard C510

Models

Suffix:

OSY - UL/FM outside stem and yoke resilient seated gate

valves CFM - cubic feet per minute meter GPM - gallons per minute meter LF - 4" – 10" (100 – 250mm) without shutoff valves

Dimensions – Weights

Approvals

B.64

Approved by the foundation for Cross-Connection Controland Hydraulic Research at the University of Southern California. Sizes 4" – 10" (100 – 250mm) approved for horizontal and vertical “flow up”. Size 3" (76mm) approved for horizontal only.

Factory Mutual approved 4" – 10" (100-250mm) vertical “flow up”.

(open)

1048

SIZE (DN) DIMENSIONS WEIGHT

D E L R T U* W/OSY† gates

In. mm

in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.

3 80 40 1016 187⁄8 479 31⁄2 89 12 305 24 610 14 356 3 76 14 356 190 86 4 100 52 1321 223⁄4 578 33⁄4 95 17 432 34 864 15 381 6 152 14 356 403 183

150 62

200 75 1905 37

⁄2 1588

⁄8 765

⁄4 959

⁄2 114

⁄2 140

21 533 41

⁄2 1054

16 406 7

⁄2 191

16 406 727 330

26 660 52 1321 17 432 9 229 21 533 1327 602

10 250 90 2286 453⁄4 1162 61⁄2 165 32 813 64 1626 18 457 101⁄4 260 25 635 2093 949

* Service clearance for check assembly from center. †UL/FM approved backflow preventers must include UL/FM approved OSY.

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Capacity

*Typical maximum system flow rate (7.5 ft./Sec.) **UL rated flow

3" (80mm)

kPa psi

96 14

69 10

41 6

14 2

Pressure Drop

0 100 200 300 400 gpm 0

380 760 1140 1520 lpm

5 7.5 15 fps

1.5 2.3 4.6 mps

Flow

kPa psi

96 14

69 10

41 6

14 2

Pressure Drop

0 100 200 300 400 500 600 gpm 0 380 760 1140 1520 1900 2280 lpm

5 7.5 15 fps

1.5 2.3 4.6 mps

4" (100mm)

Flow

6" (150mm)

a psi

96 14

69 10

41 6

14 2

Pressure Drop

0 200 400 600 800 0 760 1520 2280 3040 3800 4500 5320 lpm

5 7.5 15 fps

1.5 2.3 4.6 mps

1000 1200 1400 gpm

Flow

8" (200mm)

kPa psi

69 10

41 6

14 2

Pressure Drop

0 400 800 1200 1600 2000 4000 gpm 0 1520 3040 456 6080 7600 15200 lpm

5 7.5 15 fps

1.5 2.3 4.6 mps

Flow

10" (250mm)

kPa psi

96 14

69 10

41 6

14 2

Pressure Drop

0 400 800 1200 1600 2000 2400 2800 3200 3600 4000 gpm 0 1520 3040 4560 6080 7600 9120 10,640 12,160 13,680 15200 lpm

5 7.5 15 fps

1.5 2.3 4.6 mps

Flow

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For additional information, visit our web site at: www.watts.com

A Watts Water Technologies Company

Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca

USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com