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HomeMy WebLinkAbout003 Specs-Watts 919QT Lead Free ES-LF919 For • Applications Job Name Contractor Job Location Approval Engineer Contractor's P.O. No. Approval Representative Series LF919 Reduced Pressure Zone Assemblies Sizes: 1/2" -2" (15-5Omm) _ Series LF919 Reduced Pressure Zone Back-flow Assemblies are designed to protect potable water supplies in accordance with national plumbing codes and water authority requirements.This series can be used in a variety of installations, including the preven- tion of health hazard cross-connections or for containment at the service line entrance. LF919QT 3/4"(20mm) This series features two poppet style check valves, replaceable check seats,with an intermediate relief valve. Its compact modular design facilitates easy maintenance and assembly access.Sizes '/2"—1" (15—25mm)shutoffs have tee handles.The LF919 fea- Specifications tures Lead Free*construction to comply with Lead Free*installation requirements. A Reduced Pressure Zone Assembly shall be installed at each potential health hazard location to prevent back-flow due to back- siphonage and/or backpressure.The assembly shall consist of a Features pressure differential relief valve located in a zone between two posi- tive seating check valves. Seats and seat discs shall be replace- Separate access covers for the check valves and relief valve able in both check valves and the relief valve without the use of for ease of maintenance special tools. Service of all internal check valve components shall be through top mounted access covers threaded to the main valve •Top entry-all check internals easily accessible body.The check valve poppet assembly shall be guided via the •All rubber elastomers of chloramine resistant material use of a corrosion resistant plastic guide.The check valve and relief valve seats shall be push-in type.The relief valve cover shall •Check valve poppet assemblies are fully guided by innovative be secured with stainless steel bolts and shall utilize a quarter-turn plastic seat guide locking joint to capture the spring load of the relief valve.The relief •Replaceable push-in check valve and relief valve seats valve shall have an internal sensing line to sense the inlet water sup- eliminates threads from the water way ply.All rubber elastomers shall be of chloramine resistant material. The assembly shall also include two resilient seated isolation valves, •EZ twist relief valve cover quarter-turn locking joint captures four top-mounted resilient seated test cocks and an air gap drain the spring load during repair to facilitate disassembly fitting.The Lead Free*Reduced Pressure Zone Assembly shall comply with state codes and standards,where applicable, requiring •Innovative check valve plastic cover bushing provides trouble reduced lead content.The assembly shall be a Watts Series LF919. free guiding of the check valve poppet •Bottom mounted relief valve provides reduced installation clearances •Compact, space saving design •No special tools required for servicing Now Available •Top mounted test cocks for ease in testing and reduced WattsBox Insulated Enclosures. installation clearances For more information, refer to literature ES-WB. •Standardly furnished with NPT body connections Inquire with governing authorities for local installation requirements *The wetted surface of this product contacted by consumable water contains less than 0.25%of lead by weight. 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 with- out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold. Available Models Pressure — Temperature Suffix: Temperature Range: 330F—180°F(0.5°C—82°C) QT — quarter-turn ball valves Maximum Working Pressure: 175psi(12.1 bar) S — bronze strainer Materials Body: Lead Free'Cast Copper Silicon Alloy Discs: Silicone rubber Check Seats: Replaceable polymer Air Gaps Cover Bolts: Stainless steel Approvals a e55E °P�o c us YB 1013 sO Approved by the Foundation for Cross-Connection Control and Research at The University of Southern California. (for sizes 3/4"-2") C---- AIR GAP MODEL SIZES DIMENSIONS WEIGHT A B C(NP1) in. mm in. mm in. mm lbs. kg. 919AGC 1/4"—1" 2% 60 3Y3 79 1/2 13 .63 .28 919AGF 11/4"—2" 4% 111 8'/s 214 2 50 3.5 1.6 Dimensions — Weights ---------------------------------------- D -------------------------------------------------- ----------------------------- A ---------------------------------- AL N ----------- ! i C 1 ! M e ------------------ E ------------------- G H - F ------ LF9190T,LF919OT-S SIZE(ON) DIMENSIONS STRAINER DIMENSIONS WEIGHT A B C D E(LF) F G H M N in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs. 1/2 15 91/2 241 67/3 175 27/8 73 123/4 324 53/4 146 33/8 86 17/8 48 V/15 40 23/4 70 21/4 57 5.8 2.6 3/4 20 121/8 307 77/15 188 31/2 88 151/2 393 711/15 195 35/8 92 21/16 52 V/16 40 15/8 41 33/15 81 8.3 3.7 1 25 141/2 368 8 202 37/8 98 193/15 487 93/16 233 4 102 27/15 62 19/15 40 21/8 54 33/4 95 11.8 5.4 11/4 32 181/3 461 117/16 290 51/3 129 231/4 591 1111/16 297 51/3 130 25/3 67 21/2 64 21/2 64 47/16 113 22.3 10.1 11/2 40 183/4 476 117/16 290 51/8 129 251/15 637 1111/16 297 55/3 143 31/3 79 21/2 64 3 76 47/3 124 28.3 12.8 2 50 211/15 535 121/15 307 55/3 142 2813/16 732 133/3 340 515/15 151 37/16 87 1 21/2 64 39/15 90 515/15 151 137.3 16.9 2 Capacities kPa psi 11/4"(32mm) 1/2"(15mm) 172 25 kPa psi a 138 20 J 172 25 2 103 15 N J 138 20 sn y 103 15 a`69 10 y 69 10 ai 34 5 34 5 � 0 0 0 2.5 5 7.5 10 12.5 15 gpm 0 0 0 9.5 17.0 28.4 38 47 57 Ipm 0 10 20 30 40 50 60 70 80 gpm 0 38 76 114 152 190 228 266 304 Ipm Flow Rate Flow Rate kPa psi 3/a"(20mm) kPa psi 1/z"(40mm) 207 30 138 20 y 172 25 N � p 103 15 �+ 138 20 e 103 15 69 10 a 69 10 a 34 5 34 5 0 0 0 0 0 10 20 30 40 50 gpm 0 20 40 60 80 100 120 gpm 0 38 76FIow Rate 114 152 190 m P 0 76 152 228 304 380 456 Ipm Flow Rate kPa psi 1"(25mm) kPa psi 2"(50mm) 172 25 138 20 138 20 103 15 0 103 15 J y 69 10 y 69 10 a 34 5 34 5 0 0 0 10 20 30 40 50 60 gpm 0 0 0 38 76 114 152 190 228 Ipm 0 50 100 150 200 gpm Flow Rate 0 190 380 570 760 Ipm Flow Rate • 90 01-® 2008 IWWA19 CERTIFIED A Watts Water Technologies Company USA:Tel:(978)688-1811 •Fax:(978)794-1848•www.watts.com Canada:Tel:(905)332-4090•Fax:(905)332-7068•www.watts.ca ES-LF919 1407 ©2014 Watts