... -1 series13/20 Detail Image:Certificates:Brief Introduction:Butterfly valve is mainly consisted of body, stem, disc, ... and disc together.Characteristics of Product:Flanged Butterfly Valve, Extension Rod Butterfly Valve: SizeDN50~DN2400Design StandardEN593End flangeEN 1092, ANSI ... ALB, CF8M, 1.4529 Stem416, 420, 431SeatNBR, EPDMSuitable temperature-10°C~80°CSuitable mediumfresh water, sewage, sea water, ...