ES-F-825YD SPECIFI CA TION SHEET 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. Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor –––––––––––––––––––––––––––––––––––––––––––– Job Location ––––––––––––––––––––––––––––––––––––––––– Approval ––––––––––––––––––––––––––––––––––––––––––––– Engineer –––––––––––––––––––––––––––––––––––––––––––– Contrac tor’s P .O. No. –––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––– Representative –––––––––––––––––––––––––––––––––––––––– Series 825YD Reduced Pressure Zone Assemblies Size: 2 1 ⁄ 2" - 10" (65mm - 250mm) The FEBCO Series 825YD Reduced Pressure Zone Assemblies are used to protect against high hazard (toxic) fluids in water services to industrial plants, hospitals, morgues, mortuaries, and chemical plants. They are also used in irrigation systems, boilerfeed, water lines and other installations requiring maximum protection. Features • TheDura Chec kfeat uresalls tainlesss teelc heckas semblie sfor corrosion resistance, reduced fouling and longer valve life. • DuraCastductil eironbody forsuper iorstre ngth,cor rosionresistance and lighter weight. • Ultimatemec hanical protecti onofpotabl ewaterag ainsthaza rdsof cross-connection contamination. • Meetsallspecifications ofAWWA ,ASSE,theFoundationforCross Connecti onControl andHydr aulicR esearc hattheUni versity of Souther nCalif ornia,an dULclassi fiedfo rfirespr inkler service. • Documentedflowcurvesestabli shedbyUn iversi tyofSouth ern California Foundation for Cross-connection Control and Hydraulic Research. • Allbro nzemodularrelie fvalv eforease ofmainte nance. • End Deta il– 2 1 ⁄ 2" - 10" (65 - 250mm) Flanged ANSI B16.1 Specifications Reducedpressurebackflowpreventerassembliesshallconsistoftwo independent"Y"configuredcheckvalvesandonedifferentialreliefvalve. By design, the assembly shall automatically reduce the pressure in the zonebetweenthecheckvalves.Shouldthedifferentialbetweenthezone and upstream pressure drop to 2psi, the differential relief valve will open, maintaining proper zone differential. ValvebodiesandcovershallbemanufacturedofductileironASTMA536, Grade 65-45 12, Ductile iron bodies shall be flanged, ANSI B16.1, Class 125, epoxy coated. The assembly shall be constructed so all internal parts, including seat rings, can be serviced from the top or side or removed while assembly is inline.Theassemblyshallbe rated175psi(12.1bar)MWWP. Relief valve assembly shall be of a modular design for ease of mainte- nance. TheassemblyshallmeetorexceedrequirementsofASSEstandard1013, AWWAstandardC511,andtheUSCFoundationforCross-Connection ControlandHydraulicResearchattheUniversityofSouthernCalifornia. ReducedpressurebackflowpreventerassembliesshallbeFEBCO825YD, or prior approved equal. Operation Inaflowcondition,thecheckvalvesareopenwiththepressurebetween thechecks,calledthezone,beingmaintainedatleast5.0psi(34.5kPa) lower than the inlet pressure and the relief valve is maintained closed. Should abnormal conditions arise under no flow or reversal of flow, the differential relief valve will open and discharge to maintain the zone at least 2psi lower than the supply. In resumption of normal flow, the zone’s differ- ential pressure will resume and the relief valve will close. Pressure – Temperature Max imum Wo rki ngP ressure: 17 5psi (12.1 bar) Hydro st atic T es t P ress: 35 0p si ( 2 4.1 b ar) Tempe rat ur e R ang e: 3 2ºF to 140º F ( 0 ºC t o 60 º C) Materials Main Va lve Bod y: Ductil e iron grade 6 5-4 5-12 f usion e poxy coated internal and external Main V al ve T ri m: Bronze In te rn al Check As semb ly : St ai nless St eel Relief Valve Body an d T ri m: Br onze Elastomers: Nitri le Di aphragms: Nitri le,f abricreinforced Springs: StainlessSteel In te rn al Check As semb ly : St ai nless St eel Shutof fs: Non-risingstem,resil ientseatedgates Models • Air Gap Dra in • OS&YG ate Valves • LeftHandedRelief Val ve 825YD