... Pneumatic operator 2. AISI, ASME, API A216-WCB Gate ValveForged steel gate valve describe:Size: NPS 1/2"-2" Pressure: ... 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 ... B 16.25.END FLANGES,ASME B 16.5.INSPECTION AND TEST,API 598/API 6D A216-WCB Gate Valve