... 1. Operation: Handwheel, Gear, Motor, Pneumatic operator 2. AISI, ASME, API A216-WCB Gate ValveForged steel gate valve describe:Size: NPS 1/2 ... ,etc. Applicable standards:.STEEL GATE VALVES,API 600/API 6D.STEEL GATE VALVES,ISO 10434/ISO 24313.FACE TO FACE,ASME B 16 ... .5.INSPECTION AND TEST,API 598/API 6D A216-WCB Gate Valve