... or DI disc:DI+Nickel painted,SS304/316,AL-BRONZE C954 seat:EPDM,NBR,VITON,PTFE shaft:SS316/ ... dn150 hand lever operated cast iron wafer butterfly valve for cement Flange Drilling:Universal flange drilling able to comply ... , Ductile Iron GGG40, GGG50Disc: DI+Nickel painted,SS304/316,AL-BRONZE C954Seat: NBR ( Buan-N), EPDM, VITON, PTFEShaft & Pin: ... lever operated cast iron wafer butterfly valve for cement