... 2),Working Pressure ,3000PSI~15000PSI 3),choke manifold 4),choke manifold choke manifold 1),Choke Manifold comply with API Spec 16C 2),Working ... Nominal Bore 2-1/16″~4-1/16:choke manifold choke manifold 1.The choke manifold is support equipment of hydraulic BOP ... manual/hydraulic cylindrical gate and seat drilling choke or wafer-type drilling choke which has functions of choke flow and shut off fluid ...