Product Name: Cast Iron or Stainless Steel Lug Dual Plate Wafer Check Valve Model NO.: H71 Application: Industrial Usage, Water Industrial Usage, Household Usage Standard: ANSI Flow Direction: Unidirection Sealing Form: Body Seat Function: Ddcv Double Lobe, Nrvr Silence, Sfcv Rubber Lobe, Nrvz Silence, Nrvg Silence Pressure: 150lb~2500lb Structure: Dual Plate Wafer Type Connection Form: Wafer Material: Stainless Steel Characteristic: Dual Plate Wafer Check Valve Design & Manufacture: API 594, API 6D, Asme B16.34 Pre-Temp. Rating: Asme B16.34 Face to Face: API 594 Ends Connection: Asme B16.5/16.47 Inspect & Test: API 598 Certificate 1: Dnv CE 0575 Certificate 2: ISO 9001: 2008 Trademark: VATAC or OEM Transport Package: Standard Sea Worthy Specification: API 6D, BS1868, DIN3202, ISO Origin: China HS Code: 84818040 Product Description Cast Iron or Stainless Steel Lug Dual Plate Wafer Check ValveConform to API 594, API 6D, and ASME B16.34.They are tested according to API 598, and marked as per MSS SP-251.Construction is as follows- Dual Plate- With Spring- Round, Full Lug or Double Flange- Soft or metal Seated- Retainer or Retainer Less Design- Wafer Ends to Suit for Flanged Ends(ASME B16.5 and B16.47 A/B)2.Main Part & MaterialsPart NamesPart MaterialsBodyWCBLCBWC6CF8CF8MCF3CF3MC83600/C95800BonnetWCBLCBWC6CF8CF8MCF3CF3MC83600/C95800Disc/Ball/WedgeWCBLCBWC6CF8CF8MCF3CF3MC83600/C95800Seat/Seat Ring13%CrSS30413%CrSS304SS316SS304LSS316LC83600/C95800PTFE/NBR/EPDM/VITONPackingGraphite/PTFEGasketSS304+Graphite/SS304+GraphiteBolts/NutsB7/2HL7/4B16/4B8/8B8M/8MB8/8B8M/8MB8M/8MSuitable MediumW.O.G etc.HNO3, CH3OOH etc.Sea Water etc.Suitable Temperature-29~425 °C-46~340 °C-46~340 °C-196~427 °C-196~427 °C-196~427 °C-196~427 °C-29~220 °C3.Normal Pressure RatingPN10~PN420, CLASS150~25004.Normal Size RangeDN40~DN1000, 11/2"~40"5. PicturesFinal InspectionShipment