DCU cage type regulating valve is of single-base sleeve type with its core designed with pressure balancing hole,its valve body is of compact conformation,the flow channel is S type streamlined and mounted with a guide vane inproving the fluid equilibrum flow in the periphery of the fleeve,it has advantages of small loss caused by pressure drop,mass flow,wide adjustable range,cavitation corrosion resistance and high-precision rating curve,the regulating vale has excellent shutting off and sealing performance,the leakage ration of the valve base is equivalent to that of .