A1-Series 957RP Watts.pdf

ES-957

Job Name Contractor

Job Location Approval

Engineer Contractor's P.O. No.

Approval Representative

Series 957 Reduced Pressure Zone Assembly 2½hlloll Series 957 Reduced Pressure Zone assembly provides protection to the potable water system from contamination in accordance with national plumbing codes. The assemblies are normally used in health hazard applications for protection against backsiphonage or backpressure.

The series includes a flood sensor to detect excessive water dis-charges from the relief valve. The sensor is installed on the assembly exterior and does not alter assembly functions or certifications. The sensor relays a signal that triggers notification to facility personnel for corrective action, thus limiting flooding and costly damage.

An add-on connection kit is required to activate the flood sensor.

Without the connection kit, the sensor is a passive component that has no communication with any other device. (For more information download RPIIS-9571957DCDA.)

Features ¯ Sizes 2½", 3", and 4" available with quarter-turn ball valve shutoffs ¯ Replaceable check disc rubber ¯ Extremely compact design ¯ 70% Lighter than traditional designs ¯ 304 (Schedule 40) stainless steel housing and sleeve ¯ Groove fittings allow integral pipeline adjustment ¯ Patented torsion spring checks provide lowest pressure loss ¯ Unmatched ease of serviceability ¯ Bottom mounted cast stainless steel relief valve ¯ Available with grooved butterfly valve shutoffs ¯ Sensor on relief valve for flood detection ¯ Flood alerts feature activated with add-on sensor connection kit, compatible with BMS and cellular network communication

'The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

Use of the flood sensor does not replace the need to comply with all required instructions, codes, and regulations related to installation, operation, and maintenance of this product, including the need to provide proper drainage in the event of a discharge.

Watts is not responsible for the failure of alerts due to connectivity issues, power outages, or improper installation.

The information contained herein is not intended to replace the full product installation and safety information available or the experi-ence of a trained product installer. You are required to thoroughly read all installation instructions and product safety information before beginning the installation of this product.

Inquire with governing authorities for local installation requirements.

Watts pmduct specifications in U.S. customary units and metric are approvimate and are provided for reference only. For precise measurement please contact Watts Technicet Service. Watts reserves The right to change or modify product design, construction, specifications, or materiats with-out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

957-OSY with Flood Sensor

Specification The Reduced Pressure Zone assembly shall consist of two independent torsion spring check modules, a differential pressure relief valve located between and below the two modules, two drip tight shutoff valves, and required torsion spring check mod-ules and relief valve shall be contained with a sleeve accessible single housing constructed from 304 (Schedule 40) stainless steel pipe with groove end connections. Torsion spring checks shall have replaceable elastomer discs and in operation produce drip tight closure against the reverse flow of liquid caused by backpressure or backsiphonage. The assembly shall be a Watts Series 957, and shall include a flood sensor on the relief valve for flood detection.

Model/Option

Approvals ¯ Approved by the Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC), excluding 10" N -pattern installation as well as 6 and 10" Z-pattern installations

AVW'JAC511 -97

**SSIp14

�?'cus Approved

1013 B64.4 (BFG & OSY Only)

For additional approval information, contact the factory or visit watts.com.

FS Flood sensor on relief valve for flood detection ______________ NRS Non-rising stem, resilient seated gate valves OSY UL Classified and FM Approved outside stem and When installing a drain line on Series 957 backflow preventers, use yoke resilient seated gate valves 957AG air gaps. Attach the air gap brackets directly onto the flood

N N-pattern orientation sensor. For additional information, refer to ES-AG/ELJTC at

Z Z-pattern orientation watts.com

BFG UL Classified and FM Approved grooved gear operated butterfly valves with tamper switch

QT 21/2" - 4" quarter-turn ball valves OSY FxG** Flanged inlet gate connection and grooved outlet gate connection OSY GxF** Grooved inlet gate connection and flanged outlet gate connection OSY GxG** Grooved inlet gate connection and grooved outlet gate connection

Materials Housing & Sleeve

Elastomers

Torsion Spring Checks

Check Discs

Test Cocks

Pins & Fasteners

Springs

304 (Schedule 40) stainless steel

EPDM, silicone, and Buna-N

Noryl®, stainless steel

Reversible silicone or EPDM

Lead Free* bronze body

300 Series stainless steel

Stainless steel

Pressure - Temperature Temperature Range 33°F - 140°F

(0.5°C - 60°C)

Maximum Working Pressure 175 psi (12.1 bar)

**Options for the gate valve:

- consult factory for dimensions.

- Available with grooved NRS gate valves; consult factory.

- Post indicator plate and operating nut available; consult factory.

Noryl® is a registered trademark of SHPP Global Technologies B.V

Dimensions - Weight

I-I

'4

1I i)I,'I: [i]/' Il II

A

in. mm/n.

C (0S mm

C (NRS)

in. mm/n.

D mm S

in. mm H

in. mm in. mm J

in. mm/n.

M mm P

in. mm

957NRS

lb kg

9570SY

lb kg

957N NRS

lb kg

957N OSY

lb kg

2½ 30~ 781 16% 416 9% 238 6½ 165 29Y16 738 21½ 546 15½ 393 813A6 223 21¼ 540 93A6 234 11854 12858 12657 136 62 3 31~ 806 18½ 479 10¼ 260 611A6 170 301/4 768 22¼ 565 17½ 435 93A6 233 23 584 10½ 267 13461 14867 14767 161 73 4 33~ 857 22~ 578 123A6 310 7 178 33 838 23½ 597 18½ 470 91~6 252 261/4 667 113A6 284 16474 16474 18785187 85 6 43½ 1105 30½ 765 16 406 8½ 216 44~ 1137 33½ 851 233'16 589 131A6 332 34¼ 870 15 381 276125 298135 317144 339 154 8 49~ 1264 37% 959 191Vi6 506 911A6 246 54½ 1375 40½ 1019 277A6 697 151Y16 399 36½ 937 173A6 437 441 200 483 219 516 234 558 253

10 57~ 146745~ 1162 231Y16 605 11Y16 285 66 1676 49½ 1257 32½ 826 175A6 440 44½ 1124 20 508 723328 783355 893405 950 431

957NBFG, 957ZBFG

in. in.

S mm H

in. mm I

in. mm J

in. mm M

in. mm P

in. mm 957N/957Z lb kg

2½ 32½ 826 23 584 15½ 394 9½ 241 19~ 502 1113A6 300 67 30 3 34 864 24 610 16/16 414 101A6 256 21¼ 540 12½ 308 70 32 4 35% 905 25½ 648 173A6 437 1015A6 279 23½ 597 12% 321 87 39 6 46½ 1181 35¼ 895 20½ 521 13½ 343 27¼ 692 15 382 160 73

957, 957N, 957Z

Dimensions - Weight

I-I

A

If _IIIIlI l[I]i ii A

in. mm

C (OS

in. mm

C (NRS)

in. mm

in. mm G

in. mm H

in. mm I

in. mm J

in. mm M

in. mm P

in. mm

957NRS

lb kg

9570SY

lb kg

957N WAS

Ibkg

957W OSY

lb kg

2½ 30~ 781 16% 416 9¼ 238 6½ 165 29'/16 738 21½ 546 15½ 393 81Y16 223 21¼ 540 9,16 234 11854 12858 12657 136 62 3 31~ 806 18¼ 479 101/4 260 611/16 170 30¼ 768 22¼ 565 17½ 435 93'16 233 23 584 10½ 267 13461 14867 14767 161 73 4 33~ 857 22~ 578 12Vi6 310 7 178 33 838 23½ 597 18½ 470 91Ys6 252 26¼ 667 11i16 284 16474 164 74 187 85 187 85 6 43½ 1105 301/8 765 16 406 8½ 216 44~ 1137 33½ 851 233'is 589 13V16 332 34¼ 870 15 381 276125 298 135 317 144 339 154 8 49~ 1264 37~ 959 1915/16 506 911A6 246 541/5 1375 401/8 1019 277As 697 l5hh/i6 399 36¼ 937 173A 437 441200 483 219 516 234 558 253

10 57~ 1467 45~ 1162 231Y16 605 11Y16 285 66 1676 49½ 1257 32½ 826 175As 4401 44½ 1124 20 508 723328 783 355 893 405 950 431

¯1

957NBFG, 957ZBFG

i]II:

in.

G

in. mm H

in. mm I

in. mm J

in. mm M

in. mm P

in. mm

957N/957Z lb kg

2½ 32½ 826 23 584 15½ 394 9½ 241 19~ 502 111Ys6 300 67 30 3 34 864 24 610 165As 414 101A6 256 211/4 540 12½ 308 70 32 4 35% 905 25½ 648 173'is 437 10'5As 279 23½ 597 12¼ 321 87 39 6 46½ 1181 35¼ 895 20½ 521 13½ 343 271/4 692 15 382 160 73

957, 957N, 957Z

Capacity Flow curves as tested by Underwriters Laboratories.

Flow capacity chart identifies valve performance based upon rated water velocity up to 25 fps.

¯ Service Flow is typically determined by a rated velocity of 7.5 fps based upon schedule 40 pipe.

¯ Rated Flow identifies maximum continuous duty performance determined by A\MNA.

2½" PSI Service Flow Rated Flow IJL Rated Flow 18 - - - -r- 16 - I 14 - -4- -h!E H o 50 100 150 200 250 300 350 gpm 0 190 380 570 760 950 1140 1330 1pm

7.5 15 fps psi

C e 10

4', Service Flow Rated Flow Ill Rated Flew

I

0 100 200 300 400 500 600 700 800 gpm 0 380 760 1140 1520 1900 2280 2660 3040 1pm

7.5 13 fps

8" )Sl Service Flow Rated Flow lii Roted Flow 16 I

J 14 ____ ____ - -h 12 - ___

1e

0 500 1000 1500 2000 2500 gpm 0 1900 3800 5700 7600 9500 1pm

7.5 10 fps psi

E 10

I)

4" BFG Horizontal Service Flow Rated Flow UL Rated Flew

0 100 200 300 400 500 600 700 800gpm 0 380 760 1140 1520 1900 2280 2680 30401pm

7.5 13 fps

WWATFS®

¯ UL Flow Rate is 150% of Rated Flow and is not recommended for continuous duty.

¯ AWINA Manual M22 (Appendix C) recommends that the maximum water velocity in services be not more than 10 fps.

Flow characteristics collected using butterfly shutoff valves.

psi

e. 12 psi li 12 10=

Horizontal N-pattern ----- Z-pattern

3,' Service Flow Rated Flow *UL Rated Flow

H 100 200 380 760

7.5

300 400 500 gpm 1140 1520 1900 1pm

15 fps

6" Service Flow Rated Flew *111 Rated Flow z

0 300 600 900 1200 1500 gpm 0 1140 2280 3420 4560 5700 1pm

7.5 12 fps

10" PSI Service Flow Rated Flew *UL Rated Flow16 --- - - - -f -I-I- z 14 I-- N

0 500 1000 1500 2000 2500 3000 3500 gpm 0 1900 3800 5700 7600 9500 11400 13300 1pm

7.5 10 fps

6" BFG Horizontal psi Service Flow Rated Flow ¯UL Rated Flow

J6t_ i;

0 200 400 600 800 1000 1200 1400 1600pm 0 760 1520 2280 3040 3800 4560 5300 6060 1pm

7.5 12 fps

ES-957 2423

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