Valve body: ball valve body, butterfly valve body, check valve body etc Material: Stainless steel, duplex, nickel alloys, etc. Butterfly valve ... enterprise---Zhejiang Shidai Casting Co., Ltd, Shanghai Kefeng Alloy Casting Co., Ltd and Wenzhou Keding Machinery Manufacture Co., Ltd. And it is the ... alloy, cobalt-base alloy, and Iron-base alloy. Butterfly Valve Body