... , Pneumatic operator 2. AISI, ASME, API A216-WCB Gate ValveForged steel gate valve describe:Size: NPS 1/2"-2" Pressure: Class ... Connection:flanged,BW,etc. Applicable standards:.STEEL GATE VALVES,API 600/API 6D.STEEL GATE VALVES,ISO 10434/ISO 24313.FACE TO FACE, ... ASME B 16.10.STEEL VALVES,ASME B 16. ... AND TEST,API 598/API 6D A216-WCB Gate Valve