Technical Specification: a.Design and Manufacture:Forged steel gate valve to API 602. b.Inspection and Test:API 598. c.End flange dimension:ASME B16.5(for NPS < 24),ASME B16.47 series B,API 605 or ASME B16.47 series A,MSS SP-44(for NPS>24). d.BW end dimension:ASME B16.25. e.Socket-weld dimension:ASME B16.11. h.Face to face and end to end:ASME B16.10. h.Pressure-temperature ratings:ASME B16.34. 2.SIZE:1/2"~36"; 3.Pressure:Class 150,300,600,800,900,1500,2500.