♦ Adjustable Choke valve is classified into needle-type adjustable, barrel-type adjustable and orifice feature in design.

♦ Valve needle and valve core are made of hard alloy steel with some properties of erosion resistance and corrosion resistance.

♦ Take the effect of adjustment of flow-rate and pressure and opening/closing the choke valve.

♦ Needle structure is used for X’mas tree assembly, and barrel for choke manifold.