Gate Valve,Bolt Bonnet,OS&Y Gate Valve, ASME B16.5 Flanged or Butt-Welding Ends, Bolted Bonnet, One-Piece Flexible or Solid Wedge Gate, Full ... (Threaded or Welded In Place), Non-Rising Handwheel, Gearbox, or Power Actuator Operated, Non-Rotating Rising Stem, Complete with Conical Stem Backseat -------------------------------------------------------------------------------- • Design : API 600 / BS ...