... DI disc:DI+Nickel painted,SS304/316,AL-BRONZE C954 seat:EPDM,NBR,VITON,PTFE shaft:SS316/410 10 years professional butterfly ... : Cast Iron GG25, Ductile Iron GGG40, GGG50Disc: DI+Nickel painted,SS304/316,AL-BRONZE C954Seat: NBR ( Buan-N), EPDM, VITON, ... PTFEShaft & Pin: SS410, SS416, SS304, SS316Actuator: Lever, Worm Gear, Pneumatic and Electric ActuatorProduct characters:1 ...