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ES-F-876VST

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 materialswithout prior notice and without incurring any obligation to make such changes and modifications on FEBCO products previously or subse-quently sold.

Job Name Contractor

Job Location Approval

Engineer Contractors P.O. No.

Approval Representative

MasterSeries 876VSTDouble Check DetectorBackflow Prevention Assembly

Size: 21

2" - 10" (65mm - 250mm)

The FEBCO MasterSeries 876VST Double Check Detector Assembly isspecifically designed to protect against possible backpressure and back-siphonage conditions for non-health hazard (i.e., pollutant) applicationin accordance with Local Governing Water Utility Code. This BackflowAssembly is primarily used on potable drinking water systems where LocalGoverning Code mandates protection from non-potable quality water beingpumped or siphoned back into the potable water system.

FeaturesMain Valve:

InlineServiceableAssembly

HorizontalN-PatternInstallations

Vertical-UpZ-PatternInstallations

NoSpecialToolsRequiredforServicing

CapturedModularSpringAssembly

Reversible&ReplaceableDiscs

FieldReplaceableSeats

DuctileIronValveBodyDesign

StainlessSteelCheckComponents

Winterizationfeaturewithdiscretainersandvalvebodydrainports

ClapperCheckAssembly

Commonalitybetween1st&2ndCheckComponents

CapturedO-ringDesign

Auxiliary Bypass:

CompactBypassDesign;RemainswithinMainValveAssemblyProfile

InlineServiceable34BackflowAssembly

NoSpecialToolsRequiredforServicing

FieldReplaceableSeats&Discs

DetectPotentialUndergroundWaterLeaks

DetectUnauthorizedWaterUsage

SpecificationsThe FEBCO MasterSeries 876VST Double Check Detector Valve Assemblyshall be installed on the potable water supply and at each point of cross-connection to protect against possible backpressure and backsiphonage

conditions for non-health hazard (i.e., pollutant) applications. The assemblyshallconsistofamainlinevalvebodycomposedoftwo(2)independentlyacting approved clapper style check modules with replaceable seats anddisc rubbers. Servicing of both check modules does not require any spe-cial tools and are accessed through independent top entry covers. Thisassembly shall be fitted with approved UL/FM inlet/outlet resilient seatedshutoff valves and contain four (4) properly located resilient seated testcocksasspecifiedbyAWWAStandardC510.Theauxiliarybypasslinecon -tains a 58x34(16x19mm)WaterMeterthatcomplieswithANSI/AWWAStandardC700coupledwithanapproveddoublecheckassembly(DC)complianttoAWWAStandardC510.Thebypasslineisdesignedtodetectleaks or unauthorized water usage of the water system while protectingagainst possible backpressure and backsiphonage conditions for non-healthhazard (i.e., pollutant) application. The assembly shall be approved for hori-zontal and/or vertical-up installations while meeting the requirements ofAWWAStandardC510flowandpressurelossperformanceparameters.

MODEL 876VST DOubLE ChECk DETECTOr ASSEMbLy

IMPORTANT: INQUIRE WITH GOVERNING AUTHORITIES

FOR LOCAL INSTALLATION REQUIREMENTS

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

NOTE: The information contained herein is not intended to replace thefullproductinstallationandsafetyinformationavailableortheexperi -

ence of a trained product installer. You are required to thoroughly read al

installation instructions and product safety information before beginning

the installation of this product.

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First Spring Assembly

First Check Assembly

Second Spring Assembly

Second CheckAssembly

Test Cock #2

Shutoff Valve #1 Shutoff Valve #2

Test Cock #1

Test Cock #3

Test Cock #4

Options - SuffixOSY: UL/FMApprovedOS&YGateValves[ANSI/AWWAC515Compliant]

CFM: Cubic Feet per Minute 58x34WaterMeter[ANSI/AWWAC700Compliant]

GPM:GallonsperMinute58x34WaterMeter[ANSI/AWWAC700Compliant]

LG: LessShutoffvalves;ThisisNOTanAPPROVEDASSEMBLY

Example Ordering Description:

4876VST-OSY-GPM-ValveAssemblyfittedwithOS&YShutoffValves&

Gallons per Minute Water Meter

4876VST-OSY-CFM-ValveAssemblyfittedwithOS&YShutoffValves&Cubic Feet per Minute Water Meter

Available Components

Wye Strainer: FDAApproved[ASMEB16.1Class125&AWWAClassDFlange]

Series 611 Valve Setter:MJxMJ-MechanicalJointxMechanicalJoint[AWWAC111/A21.11]

MJxFL-MechanicalJointxFlange [AWWAC111/A21.11;ASMEB16.1Class125/AWWAClassDFlange]

FLxFLFlangexFlange[ASMEB16.1Class125&AWWAClassD

Flange]

MaterialsBelow is a general materials list of the Model 876VST. All assemblies size212through10issimilarinmaterialsandconstruction.PleasecontactyourlocalFEBCORepresentativeifyourequirefurtherinformation.

MainValveBody:DuctileironGrade65-45-12

Coating: FusionepoxycoatedinternalandexternalAWWAC550-90

ShutoffValves: OSYresilientwedgegatevalveAWWAC515(UL/FM)

Check Seats: Stainless Steel

DiscHolder: StainlessSteel

Elastomer Disc: SiliconeSpring: Stainless Steel

Clamp: AWWAC606

Approvals Standards: ApprovedbytheFoundationforCross-ConnectionControland

HydraulicResearchatTheUniversityofSouthernCalifornia[FCCCHR-USC]

ASSE1048Listed

**ULClassified[US&Canada]

**FMApproved

IAPMO/cUPC

AWWAStandardC510Compliant

EndConnections:ComplianttoASMEB16.1Class125&AWWAClassD Flange

**AssemblyconfiguredwithUL/FMApprovedOS&YRWGateValves.Less gate valve assemblies are not UL/FM approved configurations.

Assembly Flow Orientation:Horizontal(N-Pattern21210)-ApprovedbyFCCCHR-USC,ASSE,cULus,FM,IAPMO/cUPC

VerticalUp(Z-Pattern21210)-ApprovedbyFCCCHR-USC,ASSE,cULus,FM,IAPMO/cUPC

Pressure - TemperatureMax.WorkingPressure: 175psi(12.1bar)

Min.WorkingPressure: 10psi(0.7bar)

HydrostaticTestPressure: 350psi(24.1bar)

HydrostaticSafetyPressure: 700psi(48.3bar)

TemperatureRange: 33F-140F[0.5C-60C]Continuous

1048 b64.5

** **

Test Coc #3

Test Coc #2

Test Coc #1

Stoff Valve #1 Stoff Valve #2

Test Coc #4

Second Sping Asseml

Fist Sping Asseml

Fist Cec Asseml

Second CecAsseml

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Model 876VST Standard Orientation (N-Pattern) Model 876VST Vertical Orientation (Z-Pattern)

Gate Valve Side View

Clearance

Note: The Series 876VST is shipped in the standard(N-Pattern)orientationasshownabove.

D

J

I* h

G

C

F

E

A

E

bA

C

F

D

SIZE (DN) DIMENSIONS WEIGhT**

A B C D E F G H I* J OSY

in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kg.

212 65 2534 654 1212 318 614 159 2414 616 1658 422 1358 346 2714 692 312 89 1638 416 1112 292 216 98

3 80 2534 654 1212 318 614 159 2414 629 1658 422 1418 359 2814 718 334 95 2214 565 1112 292 242 110

4 100 2778 708 14 356 7 178 2634 680 1734 451 1512 394 31 787 412 114 2314 591 13 330 347 157

6 150 3214 819 16 406 8 203 3214 819 2158 548 1858 473 3714 946 512 140 3018 765 13 330 529 240

8 200 3712 953 1812 470 914 235 3638 324 2478 632 2034 527 4112 1054 634 172 3734 959 1412 368 827 375

10 250 4212 1080 21 533 10 254 4034 1035 2712 699 24 610 48 1219 8 203 48 1219 15 381 1335 605

Notes:* Indicates nominal dimensions with OSY Gate Valves (Full Open Position)** Indicates weight of complete Backflow Assemblies with specified Gate Valves

Dimensions WeightsSize: 212" - 10" (65 - 250mm)

876VST

BelowarethenominaldimensionsandphysicalweightsfortheModel876VSTsize2 12through10.Allowancesmustbemadefornormalmanufacturingtolerances.Pleasevisitourwebsitetodownloadacopyofthisproductsinstallationinstructions,orcontactyourlocalFEBCORepresentativeformoreinforma -tion.

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N

Z

N

Z

N

Z

N

Z

N

Z

N

Z

The6"and10"flowcurves(N-standardorientation)includetheFEBCOValveSetterSeries611.

Capacity

Pipe Sppot(fnised cstome) fo valve

weigt onl.

212" (65mm)kPa psi

110 16

97 14

83 12

69 10

55 8

41 6

28 4

14 20 50 100 150 200 250 300 gpm0 190 380 570 760 950 1140 lpm

hEADLOSS

3" (80mm)kPa psi

110 1697 14

83 12

69 10

55 8

41 6

28 4

14 2

0 25 75 125 175 225 275 325 gpm0 95 284 473 662 852 1041 1230 lpm

hEADLOSS

4" (100mm)kPa psi

124 18110 1697 1483 12

69 1055 841 628 414 2

0 100 200 300 400 500 600 700 gpm0 380 760 1140 1520 1900 2280 2660 lpm

hEA

DLOSS

6" (150mm)kPa psi

110 1697 1483 1269 1055 841 628 414 20 0

0 200 400 600 800 1000 1200 1400 gpm0 760 1520 22 80 3040 3 800 4540 5300 lpm

hEADLOSS

8" (200mm)kPa psi

110 1697 1483 1269 1055 841 628 414 20 0

0 500 1000 1500 2000 2500 3000 gpm0 1900 3800 5680 7560 9460 11350 lpm

hEADLOSS

10" (250mm)kPa psi

110 1697 1483 1269 10

55 841 628 414 20 0

0 1000 2000 3000 4000 5000 gpm

0 3800 7560 11350 15140 18930 lpm

hEAD

LOSS

USA: Fresno, CA Tel: (559) 441-5300 Fax: (559) 441-5301 www.FEBCOonline.com

Canada: Burlington, ON Tel: (905) 332-4090 Fax: (905) 332-7068 www.FEBCOonline.ca

ES-F-876VST 1206 2012 FEBCO

A Wat ts Water Technologies Co mpany

Performance

Flow capacity chart identifies valve performance based upon rated waterVelocityupto20fps

MaximumserviceflowrateisdeterminedbymaximumratedVelocityof7.5fps.

AWWAManualM-22(AppendixC)recommendsthatthemaximumwaterVelocityintheservicesbenotmorethan10fps.

ULflowrateisdeterminedbytypicallyratedVelocityof15feet/sec.

StandardOrientationN-Pattern VerticalOrientationZ-Pattern

FlowCurveN FlowCurveZ