ES-F-826YD

S P E C I F I C AT I O N S H E E T

FEBCO product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise mea-surements, please contact FEBCO. FEBCO 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 FEBCO products previously or subse-quently sold.

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Series 826YDReduced Pressure Detector AssembliesSize: 21⁄2" - 10" (65mm - 250mm)

The FEBCO Series 826YD Reduced Pressure Detector Assemblies designed for use in used applications with Automatic fire sprinkler systems containing toxic substances.

Features• TheDuraCheck,featuresallstainlesssteelcheckassembliesfor corrosionresistance,reducedfoulingandlongervalvelife.• DuraCast,ductileironbodyforsuperiorstrength,corrosionresistance and lighter weight. By-pass line has water meter in series with an approvedreducedpressureassembly.• LowHeadLoss• ApprovedbytheFoundationforCross-ConnnectionControland HydraulicResearchattheUniversityofSouthernCalifornia.

• EndDetailisFlanged

OperationInanonflowcondition,checkvalvesontheby-passandmainlineunitsareclosedwithpressurebetweenthechecks,calledthezone,beingmain-tained at least 5psi (35 kPa) lower than the inlet pressure and the relief valveismaintainedclosed.Ifthedifferentialbetweenthezoneandtheupstreampressuredropsto2psi(14kPa),thedifferentialreliefvalvewillopen,maintainingproperzonedifferential.Theby-passreducedpressurebackflowpreventerwilloperateidenticallytothemainlineassembly.The by-pass opens to detect initial flow and the mainline opens for all other flows.

Models• LessGates •RemoteReader

• AirGapDrain •MeterCFM/GPM

• Lefthandby-pass

Approvals• ApprovedbytheFoundationforCross-ConnectionControland HydraulicResearchattheUniversityofSouthernCalifornia.*

* ValvesmustbesuppliedwithresilientseatedshutoffvalvesforUSCandFMapprovalstobeineffect.ULandFMListingsonlyapplicablewithapprovedOS&Ygates.

SpecificationsReduced pressure detector assembly shall consist of a mainline reduced pressure configured backflow assembly in parallel with a reduced pressure by-pass assembly.Flowcurvesshallbedocumentedbyindependentlaboratorytesting.MainlinevalvebodiesandcoversshallbemanufacturedofductileironASTMA-536,Grade65-45-12andshallbeflanged,ANSIB16.1,Class125,internal and external fusion epoxy coating.Theby-passshallconsistprimarilyofabronzewatermeterinserieswithabronzereducedpressurebackflowpreventer.Alllowflowdemandsuptoaminimumof3gpm(0.189L/s)aretopassonlythroughtheby-passmeterandmeter-sizereducedpressureassem-blyandbeaccuratelyrecorded.Allflowsabovethatof3gpmwillpassthroughboththeline-sizereducedpressureassemblyandby-passwithout accurate registration by or damage to the meter.Shutoffvalvesandtestcocksshallberesilientseatedwithfullflowchar-acteristics and are to be considered integral to the assembly. The mainline shut-offsarealsotobeOS&Y,UL/FMforfirelineservice.Reduced pressure detector assemblies shall be rated 175psi CWWP (32°F to140°F),factoryassembledandtestedtoassurepropermainline/by-passbalanceandcrossoverperformance.Reducedpressuredetectorassem-bliesshallbeFEBCOSeries826YDorpriorapprovedequal.

Note: The gap drain is not designed to catch the maximum discharge pos-siblefromthereliefvalve.TheinstallationofFEBCOairgapwiththedrainlineterminatingaboveafloordrainwillhandleanynormaldischargeornui-sancespittingthroughthereliefvalve.However,floordrainsizemayneedtobedesignedtopreventwaterdamagecausedbyacatastrophicfailurecondition.Donotreducethesizeofthedrainlinefromtheairgapfitting.

Pressure – TemperatureMaximumWorkingPressure: 175psi(12.1bar)HydrostaticTestPress: 350psi(24.1bar)TemperatureRange: 32ºFto140ºF(0ºCto60ºC)

MaterialsMainValveBody: Ductileirongrade65-45-12epoxycoated internal 10-20 milsInternalCheckAssembly: StainlessSteelTrim: BronzeBy-PassValveBody: BronzeBy-PassMeter: Totalizing,1to20gpm,size5/8"x3/4"MainValveShutoffs: OS&Y,UL/FMElastomers: NitrileandNitrile/fabricreinforced

Remotereadingflowmetersavailable.

826YD

1047

* *

Capacity

size (DN) DimeNsioNs Weight

A B C D E gates less gates

in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs. lbs. kgs.21⁄2 65 371⁄4 946 221⁄8 562 71⁄2 191 163⁄8 416 101⁄4 260 243 534.6 134 294.8

3 80 413⁄4 1061 255⁄8 651 81⁄2 216 221⁄4 565 101⁄2 267 298 655.6 154 338.8

4 100 507⁄16 1281 323⁄8 822 11 279 231⁄4 591 11 279 469 1031.8 194 426.8

6 150 593⁄4 1518 385⁄8 981 14 356 301⁄4 765 12 305 752 1654.4 397 873.4

8 200 693⁄16 1757 461⁄8 1172 18 457 373⁄4 959 13 330 1207 2655.4 537 1181.4

10 250 841⁄4 2140 581⁄8 1476 22 559 48 1219 14 356 1617 3557.4 957 2105.4 Dimensions shown are nominal, allowance must be made for normal manufacturing tolerances.

InstallationTheReducedPressureDetectorAssemblyshouldbeinstalledhorizontallywithasuggestedminimumclearanceof12"(300mm)betweentheassemblyandthefloororgrade.Theymustbeinstalledwheredischargefromthereliefvalvewillnotbeobjectionableandcanbepositivelydrainedaway.Theyshouldbeinstalledwhere easily accessible for testing and maintenance and must be protected fromfreezing.Thermalwaterexpansionand/orwaterhammerdownstreamofthebackflowpreventercancauseexcessivepressure.Excessivepressuresituationsshouldbeeliminatedtoavoidpossibledamagetothesystemandassembly.

Dimensions – WeightsSize: 21⁄2" - 10" (65 - 250mm)

21⁄2" (65mm)

3" (80mm)

4" (100mm) kPa psi

137 20

103 15

69 10

34 5 0 120 240 360 480 600 gpm 0 455 910 1370 1820 2270 lpm

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loss

kPa psi

172 25

137 20

103 15

69 10 0 100 200 300 400 500 gpm 0 380 760 1135 1520 1900 lpm

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loss

kPa psi

137 20

103 15

69 10

34 5 0 50 100 150 200 250 gpm 0 190 379 570 760 950 lpm

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loss

6" (150mm) kPa psi

137 20

103 15

69 10

34 5 0 300 600 900 1200 1500 gpm 0 1135 2270 3405 4540 5680 lpm

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loss

8" (200mm) kPa psi

137 20

103 15

69 10

34 5 0 600 1200 1800 2400 3000 gpm 0 2270 4540 6810 9080 11400 lpm

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loss

10" (250mm) kPa psi

172 25

137 20

103 15

69 10 0 1000 2000 3000 4000 5000 gpm 0 3800 7600 11400 15140 19000 lpm

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loss

Protective enclosure

support– 3" (80mm) & larger

FeBCo moDel 826YD

30" max (750mm) 12" min (300mm)

suggested

side View

Fire hydrant

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USA: 4381 N. Brawley • Ste. 102 • Fresno, CA • 93722 • Tel. (559) 441-5300 • Fax: (559) 441-5301 • www.FEBCOonline.comCanada: 5435 North Service Rd. • Burlington, ONT. • L7L 5H7 • Tel. (905) 332-4090 • Fax: (905) 332-7068 • www.FEBCOonline.ca

ES-F-826YD 0718 © 2009 FEBCO

A Watts Water Technologies Company