A216-WCB Gate Valve 1. Operation: Handwheel, Gear, Motor, Pneumatic operator 2. AISI, ASME, API A216-WCB Gate ValveForged steel gate valve describe:Size: NPS 1/2 ... ,F51,etc. Operation:gearbox,chainwheel,pneumatic,electronic,etc. Connection:flanged,BW,etc. Applicable standards:.STEEL GATE VALVES,API 600/API 6D.STEEL ... .5.INSPECTION AND TEST,API 598/API 6D A216-WCB Gate Valve