... material 2.Applicable for various medium wafer type butterfly valve Material of wafer type butterfly valve Body material: GG25/GGG40/GGG50 Disc material ... SS304/SS316 Seat material: NBR/EPDM/PTFE/VITONSpecifiation of wafer type butterfly valve Model:ESW700L, ESW700G, ESW700NSize Range:11/2”~24” ... with“PI598”,”ANSI16.34” & “ISO5208”test. Picture of wafer type butterfly valve wafer type butterfly valve