... stem and disc together.Characteristics of Product:Flanged Butterfly Valve, Extension Rod Butterfly Valve: SizeDN50~DN2400Design StandardEN593End flangeEN 1092, ANSI ... /20Top flangeISO 5211Normal pressurePN1.0/1.6MPa(150/200PSI)Series 13 BodyHT200 A126 Class B QT450-10 A536 65- ... -12DiscQT450-10 A536 65-45-12Stem304 416 420 431SeatNBR, EPDM,Series 20 BodyCI, DI, WCBDiscDI, ALB, CF8M, 1.4529 Stem416, ...