... of Gas transmission & storage. The fully welded body design has no bolted bonnet or body joints that can ensure ... Full port or Reduce port, Gland Flange Design, Hard Facing Seat and Ball, Metal Seated Design, Emergency sealant injection, Cavity pressure ... Anti-static device, Double-block and bleed functionDesign Standard: Basic Design: API 6DMaterial:Carbon Steel, Stainless SteelTrim: A105+ENP, 13Cr ...