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Page 1 of 2. Model 950XLT. Top Access Double Check Valve Assembly. WILKINS a Zurn company, 1747 Commerce Way, Paso Robles, CA 93446 Phone:805-238-7100 Fax:805-238-5766. In Canada: ZURN INDUSTRIES LIMITED, 3544 Nashua Dr., Mississauga, Ontario L4V 1L2 Phone:905-405-8272 Fax:905-405-1292.

Model 950XLT

®

a

®

Top Access Double Check Valve Assembly

company

SPECIFICATION SUBMITTAL SHEET APPLICATION Designed for installation on potable water lines to protect against both backsiphonage and backpressure of polluted water into the potable water supply. A tethered test cock cap is provided to protect against fouling caused by insects, dirt and debris. Assembly shall provide protection where a potential non-health hazard exists.

FEATURES Sizes:

3/4"

 1"

STANDARDS COMPLIANCE

 1 1/4"  1 1/2"  2"

Maximum working water pressure Maximum working water temperature Hydrostatic test pressure End connections Threaded

(Unless otherwise noted, applies to 3/4" thru 2" Horizontal)

     

175 PSI 180°F 350 PSI ANSI B1.20.1

OPTIONS (Suffixes can be combined)    

ASSE® Listed 1015 (Vertical flow-up:1 1/4" thru 2") IAPMO® Listed AWWA Compliant C510 CSA® Certified (Vertical flow-up:1 1/2" & 2") NYC MEA 426-89-M VOL 3 Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California



L - less ball valves FT - with "Fast Test" test cocks U - with union ball valves S - with bronze "Y" type strainer

MATERIALS Main valve body Access covers Fasteners Elastomers Polymers Springs Test cock cover

95

ACCESSORIES  Repair kit (rubber only)  Thermal expansion tank (Model WXTP)  Bronze wye strainer  Stainless steel ball valve handles  QT-SET Quick Test Fitting Set  Test Cock Lock (Model TCL24)

Cast Bronze ASTM B 584 Cast Bronze ASTM B 584 Stainless Steel, 300 Series Silicone (FDA approved) Buna Nitrile (FDA approved) Noryl™, NSF Listed Stainless steel, 300 series Plastic

S

IN

C

D

LT

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E

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B A

F

D

C

G DIMENSIONS & WEIGHTS (do not include pkg.) MODEL SIZE in.

3/4 1 1 1/4 1 1/2 2

mm

A in.

20 13 25 14 32 19 5/8 40 20 5/16 50 21 3/8

Page 1 of 2

mm

330 356 499 516 543

A UNION BALL VALVES in.

14 5/16 15 3/4 21 5/8 22 5/16 23 1/4

mm

364 400 549 567 591

DIMENSIONS (approximate) B LESS BALL C D VALVES in.

8 3/4 8 3/4 13 3/4 13 3/4 13 3/4

mm

in.

222 2 3/8 222 2 1/2 349 4 349 5 3/8 349 5 13/16

mm

60 64 102 137 148

in.

2 5/16 2 5/16 3 5/8 3 5/8 3 5/8

mm

59 59 92 92 92

E in.

3 5/16 3 5/16 4 3/8 4 3/8 4 3/8

F mm

in.

WEIGHT LESS WITH BALL BALL VALVES VALVES

G mm

in.

84 3/4 19 17 5/8 84 3/4 19 19 3/4 111 1 5/16 33 24 3/4 111 1 5/16 33 25 15/16 111 1 5/16 33 28 5/16

mm lbs. kg

448 502 629 659 719

4 8 16 16 17

1.8 3.6 7.3 7.3 7.7

lbs.

kg

6 2.7 12 5.4 22 10 22 10 29 13.2

DOCUMENT #: REVISION: BF-950XLT 7/12 WILKINS a Zurn company, 1747 Commerce Way, Paso Robles, CA 93446 Phone:805-238-7100 Fax:805-238-5766 In Canada: ZURN INDUSTRIES LIMITED, 3544 Nashua Dr., Mississauga, Ontario L4V 1L2 Phone:905-405-8272 Fax:905-405-1292 Product Support Help Line: 877-BACKFLOW (877-222-5356) • Website: http://www.zurn.com

FLOW CHARACTERISTICS MODEL 950XLT 3/4", 1", 1 1/4", 1 1/2" & 2" (STANDARD & METRIC) 1.26

15

2.52

3/4" (20mm)

3.8

5.0

1" (25mm)

10

10

5

5

0

20

0

40

80

60

3.2

15

0

6.3

9.5

1 1/4" (32mm)

12.6

1 1/2" (40mm)

15.8 103

2" (50mm)

69 35

100

50

0

150

200

250

PRESSURE LOSS (kpa)

PRESSURE LOSS (PSIG)

FLOW RATES (l/s)

FLOW RATES (GPM) Rated Flow (Established by approval agencies)

TYPICAL INSTALLATION Local codes shall govern installation requirements. To be installed in accordance with the manufacturer’s instructions and the latest edition of the Uniform Plumbing Code. Unless otherwise specified, the assembly shall be mounted at a minimum of 12" (305mm) and a maximum of 30" (762mm) above adequate drains with sufficient side clearance for testing and maintenance. If installed below grade, be certain adequate drainage is provided to prevent the device from being submerged.

PROTECTIVE ENCLOSURE

Capacity thru Schedule 40 Pipe Pipe size 5 ft/sec 7.5 ft/sec 10 ft/sec 15 ft/sec 1/8" 1 1 2 3 1/4" 2 2 3 5 3/8" 3 4 6 9 1/2 5 7 9 14 3/4" 8 12 17 25 1" 13 20 27 40 1 1/4" 23 35 47 70 1 1/2" 32 48 63 95 2" 52 78 105 167

S

N

I PS 5 F 17 80˚ 1

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0X

95

IL

W

S

KIN

IL

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S N I PS 5 F 17 80˚ 1

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OUTDOOR INSTALLATION

IL

DIRECTION OF FLOW

W

12" MIN. 30" MAX.

DIRECTION OF FLOW

PIT INSTALLATION

SPECIFICATIONS The Double Check Type Backflow Preventer shall be ASSE Listed 1015, rated to 180°F and supplied with full port ball valves. The main body and access covers shall be bronze (ASTM B 584), the seat ring and all internal polymers shall be NSF® Listed Noryl™ and the seat disc elastomers shall be SILICONE. The first and second check shall be located at a 45° angle and accessible for maintenance from the top of the device, without removing the device from the line. Each check shall have separate access covers and test cocks shall be accessible from the top of the device. Test cocks shall be protected from debris by a tethered cap. The Double Check Type Backflow Preventer shall be a WILKINS Model 950XLT. WILKINS a Zurn company, 1747 Commerce Way, Paso Robles, CA 93446 Phone:805-238-7100 Fax:805-238-5766 IN CANADA: ZURN INDUSTRIES LIMITED, 3544 Nashua Dr., Mississauga, Ontario L4V 1L2 Phone:905-405-8272 Fax:905-405-1292 Product Support Help Line: 877-BACKFLOW (877-222-5356) • Website: http://www.zurn.com

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