1. Disc for butterfly valve 2. Precision Casting 3. Stainless Steel 4.OEM brand ... range:1.Material: abrasion-resistant steel, refractory steel, bronze, cast iron, cast steel, stainless steel, Hastelloy alloy, Stellite alloy, Mondale ... , plating, heat treatment etc.4.Application: mining equipment, pump & valve, ship building industry, heavy machinery, engineering machinery, water treatment etc ...