4 - ShanControls

SilverEagle Series 757a,757Na (2 1 ⁄2" – 6")Double Check Valve Assemblies• Designed to prevent backflow of pollutantsthat are objectionable but not toxic for entering the potable water supply.• For non-health hazard continuous pressure applications.• Provides protection against backsiphonage and backpressure backflow.Specifications• Temperature Range: 33°F – 140°F (5°C – 60°C).• Maximum Working Pressure: 175psi (12.1 bars).Modelsadd Suffix:NRS non-rising stem resilient seated gate valves.OSY UL/FM outside stem and yoke resilient seated gate valves.BFG UL/FM grooved gear operated butterfly valves with tamper switch.QT 21 1 ⁄2" – 3" quarter-turn ball valves.Post indicator plate and operating nut available – consult factoryFor additional information, request literature ES-757a/757Na.For WattsBox Enclosures, request literature ES-WB.C (open)757a OSYJFeatures757Na BFG• Extremely compact design• 70% Lighter than traditional designs• 304 (Schedule 40) stainless steel housingand sleeve• Groove fittings allow integralpipeline adjustment• Patented bi-link check provides lowestpressure loss• Unmatched ease of serviceability• Available with grooved butterflyvalve shutoffs• May be used for horizontal, vertical or Npattern installations• Replaceable check disc rubber• Sizes 2 1 ⁄2" – 3" available with quarterturnball valve shutoffs4Backflow Preventers & AccessoriesADHGIPP1757a/757NaSIZE (DN) DIMENSIONS (APPROX.) WEIGHTA C (OSY) C (NRS) D G H I J P 757a NRS 757a OSY 757Na NRS 757Na OSYin. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs. lbs. kgs. lbs. kgs. lbs. kgs.2 1 ⁄2 65 31 787 16 3 ⁄8 416 9 3 ⁄8 238 3 1 ⁄2 89 29 1 ⁄16 738 22 559 15 1 ⁄2 393 8 13 ⁄16 223 9 3 ⁄16 234 115 52 125 57 123 56 133 603 80 31 11 ⁄16 805 18 7 ⁄8 479 10 1 ⁄4 260 3 11 ⁄16 94 30 1 ⁄4 768 22 3 ⁄4 578 17 1 ⁄8 435 9 3 ⁄16 233 10 1 ⁄2 267 131 59 145 66 144 65 158 724 100 33 11 ⁄16 856 22 3 ⁄4 578 12 3 ⁄16 310 4 102 33 838 24 610 18 1 ⁄2 470 9 15 ⁄16 252 11 3 ⁄16 284 161 73 161 73 184 83 184 836 150 44 1118 30 1 ⁄8 765 16 406 5 1 ⁄2 140 44 3 ⁄4 1137 33 3 ⁄4 857 23 3 ⁄16 589 13 1 ⁄16 332 15 381 273 124 295 134 314 142 336 152757a BFG / 757Na BFGSIZE (DN) DIMENSIONS (APPROX.) WEIGHTA C D G H I J P 757a BFG 757Na BFGin. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs. lbs. kgs.2 1 ⁄2 65 28 711 8 203 3 1 ⁄2 89 29 7 ⁄8 759 22 559 14 15 ⁄16 379 8 13 ⁄16 223 9 229 56 25 64 293 80 28 1 ⁄2 724 8 5 ⁄16 211 3 11 ⁄16 94 30 11 ⁄16 779 22 3 ⁄4 578 15 7 ⁄16 392 9 3 ⁄16 233 9 1 ⁄2 241 54 24 67 304 100 29 3 ⁄16 741 8 15 ⁄16 227 3 11 ⁄16 94 31 15 ⁄16 811 24 610 16 1 ⁄4 412 9 15 ⁄16 252 10 254 61 28 84 386 150 36 1 ⁄2 927 10 254 5 127 43 3 ⁄16 1097 33 3 ⁄4 857 19 11 ⁄16 500 13 1 ⁄16 332 10 1 ⁄2 267 117 53 157 71757aQTSIZE (DN) DIMENSIONS (APPROX.) WEIGHTA C D G H I J P P1in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.2 1 ⁄2 65 28 15 ⁄16 735 4 7 ⁄8 124 3 13 ⁄16 97 30 1 ⁄4 768 24 1 ⁄2 622 16 9 ⁄16 421 11 3 ⁄8 289 10 7 ⁄16 265 8 5 ⁄16 211 35 163 80 30 3 ⁄16 767 4 13 ⁄16 122 3 7 ⁄8 98 30 1 ⁄4 768 24 1 ⁄2 622 17 3 ⁄16 437 11 1 ⁄4 258 10 7 ⁄16 265 8 9 ⁄16 217 45 21For assistance, contact your local authorized Watts agent or visit our website at www.wattsreg.com37