Sell API 600check valve(cast iron gate valve,ball valve of stainless steel) 1.flanged end: ... 2.Socket-weld :ANSI B16.1 API 600check valve(cast iron gate valve,ball valve of stainless steel)Product diameter:2 ... .34 Material: WCB, WC6, WC9, LCB, CF8M, CF3M Applicable Medium: steam, water, oil ,acid,alkali