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方向控制阀 按用途分为单向阀和换向阀。单向阀：只允许流体在管道中单向接通，反向即切断。换向阀：改变不同管路间的通﹑断关系﹑根据阀芯在阀体中的工作位置数分两位﹑三位等；根据所控制的通道数分两通﹑三通﹑四通﹑五通等；根据阀芯驱动方式分手动﹑机动﹑电动﹑液动等。
60年代后期，在上述几种液压控制阀的基础上又研制出电液比例控制阀。它的输出量(压力﹑流量)能随输入的电信号连续变化。电液比例控制阀按作用不同，相应地分为电液比例压力控制阀﹑电液比例流量控制阀和电液比例方向控制阀等。
DG5S-H8-4C-E-VM-U-A5-50
DG5S-H8-4C-E-VM-U-H5-50
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DG5S-H8-6C-2-M-U-H5-50
DG5S-H8-6C-2-VM-U1-H5-70（带插头）
DG5S-H8-6C-M-U-D6-41
DG5S-H8-8C-2-E-VM-U-H5-5
DG5S-H8-8C-2-S-VM-U-A5-50
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