ZS3系列多路换向阀

　 ZS3系列多路换向阀是一种以手动换向阀为主体的组合阀，它主要用于工程机械、矿山机械、起重运输机械和其他机械液压系统，用以改变液流方向，实现多个执行机构的集中控制。
　　ZS3系列多路换向阀在原ZS系列换向阀的基础上进行了改进设计，不但继承了ZS系列多路阀的各种优点还具有良好的调速性能，即工作滑阀在节流段内移动时，工作流量会随滑阀移动而逐渐增大或减小，因此，主机执行机构在不同的工作状态下，其对应的工作速度可通过操纵多路阀滑阀来调节，特别是在启动或停止工作状态时，工作速度逐渐增大或减小，从而克服冲击现象，使启动停止平稳可靠。
ZS3的油路形式、滑阀机能及定复位方式、外形安装连接尺寸均与ZS系列相同。
　　The ZS3 series multiple directional control valves, one kind of combination valves with the manual directional control valves， are mainly used in hydraulic systems of engineering machinery, mining machinery, lifting transportation machinery and other machinery to change flow direction for integrated control over several actuator.
　　The ZS3 series multiple directional control valves are designed on the basis of the former ZS series, not only succeeding the advantages of the ZS series multiple directional control valves, but also including fine speed－regulating function, which means that the work flow rate will increase or decrease respectively with spool movement when the spool is moving within the flow－throttling section. Therefore, the corresponding working speed of the actuating mechanism of the main machine can be regulated by operating the multiple direction control valve. Especially during starting or stopping process, the working speed can increase or decrease gradually to overcome the shock and to ensure smooth starting or stopping.
　　The ZS3 series multiple directional control valves have the same oil circuit, spool valve function, and positioning and returning modes as the ZS1valves.