... 2. AISI, ASME, API A216-WCB Gate ValveForged steel gate valve describe:Size: NPS 1/2"-2" Pressure: Class 150-2500 ... ,F304L,F316L,F51,etc. Operation:gearbox,chainwheel,pneumatic,electronic,etc. Connection:flanged,BW,etc. Applicable standards:.STEEL GATE VALVES,API 600 ... .INSPECTION AND TEST,API 598/API 6D A216-WCB Gate Valve