4 - ShanControls

Series 774DCDA (2 1 ⁄2" – 12")Series 774XDCDA (6" and 8")Double Check Detector Assemblies• Designed to prevent the reverse flow of pollutedwater from entering the potable water system.• For non-health hazard continuous pressure applications. 774XDCDA OSY• Provides protection against backsiphonage and backpressure backflow.• Detects system leaks or unauthorized use of the water supply.Specifications• Temperature Range: 33°F – 110°F(5°C – 43°C)• Maximum Working Pressure: 175psi(12.1 bars)GC(Open)Modelsadd Suffix:CFM cubic feet per minute meter.GPM gallons per minute meter.LF without shutoff valves.OSY UL/FM outside stem and yokeresilient seated gate valves.OSY FxG flanged inlet gate connectionand grooved outlet gateconnectionOSY GxF grooved inlet gate connectionand flanged outlet gateconnectionOSY GxG grooved inlet gate connectionand grooved outlet gateconnectionPost indicator plate and operating nutavailable – consult factory774DCDA OSYFeatures• Patented torsion spring check valveprovides low head loss• Short lay length is ideally suited forretrofit installations• Stainless steel body is half the weightof competitive designs reducing installationand shipping cost• Stainless steel construction provideslong term corrosion protection andmaximum strength• Single top access cover withtwo-bolt grooved style couplingfor ease of maintenance• Thermoplastic and stainless steelcheck valves for trouble-free operation• No special tools required for servicing• Compact construction allows forsmaller vaults and enclosures• Furnished with 5 ⁄8" x 3 ⁄4" bronze meter(gpm or cfm)• Detects underground leaks andunauthorized water use• May be installed in horizontal or verticalflow up position4Backflow Preventers & AccessoriesLADPSFor additional information, request literatureES-774DCDA or ES-774XDCDA.For WattsBox Enclosures,request literature ES-WB.774DCDASIZE (DN) DIMENSIONS (APPROX.) WEIGHTSA C (OSY) D G L P w/Gates w/o Gatesin. mm in. mm in. mm in. mm in. mm in. mm in. mm lb. kg. lb. kg.2 1 ⁄2 65 38 965 16 3 ⁄8 416 3 1 ⁄2 89 10 254 22 559 12 1 ⁄2 318 155 70 68 313 80 38 965 18 7 ⁄8 479 3 3 ⁄4 95 10 254 22 559 13 330 230 104 70 324 100 40 1016 22 3 ⁄4 578 4 1 ⁄2 114 10 254 22 559 14 1 ⁄2 368 240 109 73 336 150 48 1 ⁄2 1232 30 1 ⁄8 765 5 1 ⁄2 140 15 381 27 1 ⁄2 699 15 1 ⁄2 394 390 177 120 548 200 52 1 ⁄2 1334 37 3 ⁄4 959 6 3 ⁄4 171 15 381 29 1 ⁄2 749 18 1 ⁄4 464 572 259 180 8210 250 55 1 ⁄2 1410 45 3 ⁄4 1162 8 200 15 381 29 1 ⁄2 749 19 1 ⁄2 495 774 351 190 8612 300 57 1 ⁄2 1461 53 1 ⁄8 1349 9 1 ⁄2 241 15 381 29 1 ⁄2 749 21 533 1044 474 220 100774XDCDASIZE (DN) DIMENSIONS (APPROX.) WEIGHTA C (open) D G L P S w/Gates w/o Gatesin. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lb. kg lb. kg.6 150 41 1 ⁄2 1054 30 1 ⁄8 765 5 1 ⁄2 140 11 1 ⁄8 283 20 508 16 1 ⁄2 419 11 279 341 155 71 328 200 52 1 ⁄2 1334 37 3 ⁄4 959 6 3 ⁄4 171 17 1 ⁄2 445 29 1 ⁄2 749 17 1 ⁄2 445 13 1 ⁄2 343 555 252 135 61For assistance, contact your local authorized Watts agent or visit our website at www.wattsreg.com45