... , 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,LF2,F11,F22,F5,F304,F316,F304L,F316L ... .5.INSPECTION AND TEST,API 598/API 6D A216-WCB Gate Valve