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chock valve
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 Choke Valve：The choke valve, a main component of Christmastree, is design to control production rate of the oil well,with working pressure up to 10000psi. Choke valvescan be classified as follows: adjustable choke valves and positive choke valves. By rotating handwheel todrive the stem, the adjustable choke valve is designedto adjust the effective area available for the flow to ac-complish control of production rate. The positive chokevalve is design to accomplish control of production rateby changing flow beans. Features： The coupling nut used for connecting the bonnetand body allows fast make-up and break-out Stem tip and bean adaptor are fabricated from spe-cial carbide alloys for corrosion and abrasionresistance. Indicator lens with scale marks allows the operatorto know stem’s position and actual orifice area Turn handwheel counter-clockwise and the valvewill open; turn handwheel clockwise and the valvewill close. Parts List：
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Hydraulic choke valve
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 The hydraulic choke valve is used to be matchedwith manifold and other assemblies, which is appli-cable for flow-rate adjustment, that is, to raise or re-duce the valve core location is help for alternation offlow-way cross-area and flow-rate control.Main technological parameters Rated pressure：2000-15000psi Working temperature：PU Working medium：etroleum、natural gas Parts List：
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Manual orifice choke valve
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Orifice choke valve is molded of two pieces of spe-cial carbon tungsten plates with rather ability of erosionresistance, one of which rotates to alter the concentric-ity between the upper orifice and lower orifice of twoplates so as to adjust the flow-rate of fluid or gas. The valve is used for manifold such as drilling,fracture, mud circuit, ground high-pressure gas injec-tion/production, it has a outstanding feature that the pres-sure difference between inlet and outlet, as closing, canpress both of the plates fast together so as to put intoeffect of sealing cutting, especially in the case that thepressure suddenly rises or falls,the pre-set sign-rate ofhigh/low pressure sensor can be helpful for automaticclosing/shut so as to avoid heavy accident. It is out-standing advantage that it has long working life andability of erosion/corrosion resistance in comparing withother choke valves. Parts List：
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