API6A & API16C Choke Valves are very important components of Wellhead Assembly Christmas Tree, Choke Manifolds. It mainly comes in two types, adjustable choke and postitive/fixed choke. We can produce many types of choke valves, such as Adjustable Choke Valves, Positive/Fixed Choke Valves, Hydraulic Choke Valve, Manual or Hydraulic Orifice Choke Valves.