... resistance.6. Suitable medium: water, sewage, sea water, air, steam, food, medicament, oils, acids, alkalis, salts ... Gear.Material List No.PARTS NAMEMATERIAL1BodyCast iron/ductile iron/SS/WCB2DiscAl-bronze/monel/3PinSS416/WCB/titanium ... /viton/neoprene8Worm-gearCast iron/ductile iron/malleable9Hand wheelCast iron/ductile iron/malleable10BoltWCB BW102 Cast Iron Worm Gear Operated Wafer Butterfly Valve