Plug Valve, Gate Valve, Choke and Kill Manifold manufacturer / supplier in China, offering API 6A 3-1/8 5000psi FC Gate Valve with Flange End, FKM Seals for Hammer Union, API 6A 7-1/16" 10000psi Drilling Adapter Spools or Spacer Spools or Riser Flange and so on.