Butterfly Valve 233

The most critical aspectof the Series BFV Butterfly Valves is the cartridge seat design, whichalleviates installation problems associated with common “dove taildesign” seats. Valve torque is lower and more consistent because the seatdynamics do not rely on being mated between two flanges. Precision machiningof the disc and body allow the cartridge design to maintain a tighter disc toseat tolerance, providing a perfect low torque seal each and every time thevalve is cycled. Seat to disc seal is independent of flange support andcapable of full rated dead end service. Select from wafer or lug patterns witheither a 10-position locking handle lever or manual gear operator. Standardvalves provide bubble tight sealing to 225 psi (15.5 bar) and are designed tocomply with MSS-SP-67 and API-609.Service:Compatible liquids, gases, and steam.Line Size: 2″ to 12″.Body Style: 2-way, wafer or lug butterfly.End Connections: Flange, to be used withflanges that are ANSI Class 125 (B16.1) and ANSI Class 150 (B16.5) dimensions.Pressure Limit: 225 psi (15.5 bar) WOG.Wetted Materials: Body: Ductile iron; Disc:316 SS; Seat and O-ring: EPDM or PTFE; Stem: 410 SS.Temperature Limits: EPDM Disc: -50 to 250°F(-46 to 121°C); PTFE Disc: 0 to 300°F (-18 to 149°C).Bearings: Nylatron.Flow Rate: See Cv chart on Catalog page.Opeator: 2 to 6″: 10-position lockinghand lever; 8 to 12″: manual gear.• Phenolic backed cartridge seat design forextended service and ease of replacement. Can be used for vacuum service.• Extended neck for insulation – no fabricatedextensions required.• Machined flats attach disc/stem – no pins.• Valve features a retainer lip for dead endservice.• Triple seal reduces possibility of externalleakage.• Silicone free from the factory – noaftermarket cleaning required.