1. Disc for butterfly valve 2. Precision Casting 3. Stainless Steel 4.OEM brand Our ... , machining, plating, heat treatment etc.4.Application: mining equipment, pump & valve, ship building industry, heavy machinery, engineering machinery, water treatment etc ... is from 0.5 kilograms to 80 kilograms, the largest single sand casting weight is up to 5,000 kg.7 ...