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Home My WebLink AboutTab 1 - Watts Backflow Preventer Valve ES-909L For • Applications Job Name Contractor Job Location Approval Engineer Contractor's P.O. No. Approval Representative Tan No CV 61 cn Series 909 Reduced Pressure Zone Assemblies Sizes: 21/2" - 10" (65-250mm) 9090SY Series 909 Reduced Pressure Zone Assemblies are designed to provide cross- connection control protection of the potable water supply in accordance with " national plumbing codes.This series can be utilized in a variety of installations, including health hazard cross-connections in plumbing systems or for contain- a ment at the service line entrance.With its exclusive patented relief valve design incorporating the"air-in/water-out"principle,it provides substantially improved relief valve discharge performance during the emergency conditions of com- bined backsiphonage and backpressure with both checks fouled. Features • Replaceable bronze seats First Check Relief Valve Second Check Assembly Assembly • Stainless steel internal parts • No special tools required for servicing • Captured spring check assemblies • Fused epoxy coated&lined checks • Industrial strength sensing hose • Field reversible relief valve • Air-in/water-out relief valve design provides maximum capacity during emergency conditions Available Models Pipe Line Center Relief Valve Seat Suffix: — Relief Valve Piston BB- bronze body(21/",3"only)(64,76mm) Relief Valve LF- without shutoff valves Piston Assembly NRS- non-rising stem resilient seated gate valves Relief Valve ^~ Wiper Seal outside stem&yoce rest ien seaiea gate valves BAY Flange QT-FDA- FDA epoxy coated quarter-turn ball valves Spprriing Assembly S- cast iron strainer S-FDA- FDA epoxy coated strainer Note:The installation of a drain line is recommended.When installing a drain line,an air gap is necessary. Now Available Specifications WattsBox Insulated Enclosures. A Reduced Pressure Zone Assembly shall be installed at each cross-connec- For more information, send for literature ES-WB. tion to prevent backsiphonage and backpressure backflow of hazardous mate- rials into the potable water supply.The assembly shall consist of a pres- IMPORTANT INQUIRE WITH GOVERNING AUTHORITIES sure differential relief valve located in a zone between two positive seating FOR LOCAL INSTALLATION REQUIREMENTS check valves and captured springs.Backsiphonage protection shall include provision to admit air directly into the reduced pressure zone via a separate channel from the water discharge channel.The assembly shall include two tightly closing shutoff valves before and after the valve and test cocks.The assembly shall meet the requirements of ASSE Std. 1013;AWWA Std. C511-92;CSA B64.5:and UL Classified File No.EX3185.Listed by IAPMO(UPC).Approved by the Foundation for Cross-Connection Control and WAWS`k' Hydraulic Research at the University of Southern California.The assembly shall be a Watts Regulator Company Series 909. REGULATOR Watts product specifications in U.S.customary units and metric are approximate and are provided for reference only.For precise measurements,please contact Watts Technical Service.Watts reserves the right to change or modify product design,construction,specifications,or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold. Materials How It Operates Body:FDA epoxy coated cast iron The unique relief valve construction incorpo- Seals:bronze rates two channels:one for air,one for Trim:stainless steel water When the relief valve opens,as in the Relief Valve:21/2"-3"(60-80mm)bronze accompanying air-in/water-out diagram,the 4"-10"(100-250mm)FDA epoxy coated cast iron right-hand channel admits air to the top of 4 Test Cocks:bronze body the reduced pressure zone,relieving the zone vacuum.The channel on the left then Pressure — Temperature drains the zone to atmosphere.Therefore,if Temperature Range:33*F-110°F(5*C-43*C)continuous, both check valves foul,and simultaneous 140°F(60°C)intermittent negative supply and positive backpressure Patent# develops,the relief valve uses the air-in/ 4,241,752 Water Air Maximum Working Pressure:175psi(12.06 bar) water-out principle to stop potential backflow. Out In Standards Approvals AWWA C511-92 �ssiF�� IAPM0 PS 31,SBCCI(Standard Plumbing Code) ® ca FM U` us USC manual for Cross-Connection Control,8th Edition cus Approved 1013 664.5 Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California. Capacity *Typical maximum flow rate(7.5 feet/sec.) 21h"(65mm) 3"(80mm) kpa psi * kPa psi 138 20 138 20 103 15 103 15 69 10 69 10 35 5 35 5 AP 25 50 75 100 125 150 115 2110 225 !__A<l215 300 gpm AP 0 50 100 150 200 250 300 350 400 gpm 0 95 190 285 380 475 570 665 7W 8551401pm 0 190 390 570 760 950 1140 1330 1520 Ipm 5 7s 15 5 7.6 15 fps 1s 23 4.6 1s 2.3 4.6 mps 4"(100mm) 6"(150mm) kPa psi x kPa psi 138 20 138 20 103 15 103 15 69 10 69 10 010, 35 5 35 5 _000- AP 0 1.1orm 200 300 400 600�=pm AP 0 400 600 800 1000 1 1400 1600 gpm 0 38D 760 1140 1520 1900 0 760 1520 2280 30W 3800 4560 60801 pm 5 7s 10 15 5 7.6 15 fps 1s 2.3 3A 4.6 p 1s 23 4.6 mps 8"(200Mm) 10"(250mm) kPa psi t kPa psi 138 20 138 20 103 15 103 15 69 10 69 10 35 5 35 5 AP 200 4W 600 800 1000 12M 1400 1600 2000 gpm AP 0 1000 15M 2000 3000 gpm 0 760 1520 2280 30W 3800 410 5320 6060 Ipm 0 3800 5700 76W 9500 400 Ipm 5 7s 10 5 7s 10 1.5 2.3 3.0 1 s 2.33.0 2 Dimensions — Weights 0 0 i --------- Ar---------- O O O O C OUTLET --M----- ' (open) O O U ' r 1 `✓ i r r r 7� O r 1 1 1 D r N4 N r Quarter-turn (QT)Valve r r r ------------ L ------------ -------------------- A -------------------- Watts G-4000 Series Ball Valves Send for F-434000 NOTE: Relief valve section is reversible, therefore, can be on either side and is furnished standardly as shown. SIZE(ON) DIMENSIONS WEIGHT C clearance for check A Al (OSY)- (NRS) D L u R R(OT) T NRS OSY OT in mm in mm in. mm in. mm in mm in mm is mm in. nun in. mm in. mm in. nun lbs. kgs. lbs. kgs. lbs. kgs. 91A rr A111. 6 8 8 1 1 1 3 80 42'/4 1073 21'/4 540 *1n-Wg 101A 260 5'/+ 133 26'/s 663 11 279 5 127 16 406 9'/u 230 225 102 490—�94- -490--96r 8 8 4 "0: 4 -a 6 150 65'/2 1664 32'/4 832 30'/a 765 16 406 6 152 44'/2 1130 16 406 11 279 26 660 14% 365 718 326 798 362 762 346 8 200 781h 2000 39% 10DO 373/4 959 915/16 506 93/4 248 551/4 1403 21 533 11 Y4 286 11'/4 286 19'/4 489 1350 612 1456 660 2286 1037 10 250 935/8 2378 46% 1190 453/4 1162 313/16 605 9'/4 248 673/8 1711 21 533 121h 318 12'h 318 21 533 2160 980 2230 1011 3716 1685 'UL,FM approved bacidlow preventers must include UUFM approved OSY gate valves. trainer Dimensions SIZE r N1t N in. mm in7 mm in. mm mm lbs. kgs. 2116 65 10 254 10 61h 165 28 12.7 3 80 101h 257 2 7 178 3415.4 4 100 121h 3 12 305 210 60 27 6 150 1 1 ' 470 20 508 13'/r 133 60 8 200 15h 549 22'/4 578 151h 394 7 112 10 01 26 660 1 28 711 181h 470 370 68 Dimension required for screen removal Air Gap Dimensions When installing a drain line on Series 909 bacldkwv preventers that are installed hori- zontally,use 909 AG series air gaps. --- A --- r DIMENSIONS r r Iron Ordering Series/Sizes ' Body Code A B C i Model No. in. mm in. mm in. mm Ibs kgs ; 909AG F 0881378 11/4"-3"009/909 B r 1'/4"-2"009 M1 43A 111 63/4 171 2 51 3.25 1.47 � 1 2"009 M2 r 909AG-K 0881385 4"-6"909 63A 162 95h 244 3 76 6.25 2.83 1 8"-10"909 M1 909AG-M 10881387, 8"-10"909 IN 187 11'/4 286 1 4 102 15.50 7.03 C For flange size backflow preventers installed vertically(flow down),a fabricated air gap is recommended. 3