Valve body: ball valve body, butterfly valve body, check valve body etc Material: Stainless steel, duplex, nickel alloys, etc. Butterfly valve body1. Meterial: stainless steel 316L, ... of the largest precision casting companies in East China, holding 3 exclusively invested enterprise---Zhejiang Shidai Casting Co., Ltd, Shanghai ... alloy, cobalt-base alloy, and Iron-base alloy. Butterfly Valve Body