... 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"-2" Pressure: Class 150-2500 Material:A105 ... F51,etc. Operation:gearbox,chainwheel,pneumatic,electronic,etc. Connection:flanged,BW,etc. Applicable standards:.STEEL GATE VALVES,API 600/ ...