传统换向阀的进出油口控制通过一根阀芯来进行，两油口的开口对应关系早在阀芯设计加工时已确定，在使用过程中不可能修改，从而使得通过两油口的流量或压力不能进行独立控制，互不影响。磁力泵R900423860 DBDA10G1X/100

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随着微处理控制器、传感器元件成本的下降，控制技术的不断完善，使得双阀芯控制技术在工程机械领域得以应用。英国Utronics公司利用自己的技术及专利优势研制出双阀芯多路换向阀，已广泛应用于JCB、Deere、DAWOO、CASE等公司的挖掘机、装载机及挖掘装载机等产品上。为适应中国工程机械产品对液压系统功能要求。稳定性以及自动化控制程度的不断提高，Utronics公司产品适时进入中国市场，现已初步完成厦工（5t）装载机、詹阳（8t）挖掘机样机调试并进入试验阶段。 

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