SHD-02G-2B2-A22D-33 SHD-02G-2B3-A22D-33
这个卸荷回路就是在液压泵工作的时候，液压执行元件不工作，此时液压泵输出的液压油要回到油箱。降低液压泵频繁启动所带来的能量损耗，延长液压泵的使用寿命。二位二通阀卸荷回路
图中并联了一个二位二通阀，当如图中接通时，系统实现卸荷，因为液压缸有阻力油全部通过二位二通阀泄掉。
台湾锐力REXPOWER减压阀部分型号如下：
MGV-02-P-0 MGV-02-A-0 MGV-02-B-0
MGV-02-P-1 MGV-02-A-1 MGV-02-B-1
MGV-02-P-2 MGV-02-A-2 MGV-02-B-2
MGV-02-P-3 MGV-02-A-3 MGV-02-B-3
MGV-03-P-0 MGV-03-A-0 MGV-03-B-0
MGV-03-P-1 MGV-03-A-1 MGV-03-B-1
MGV-03-P-2 MGV-03-A-2 MGV-03-B-2
MGV-03-P-3 MGV-03-A-3 MGV-03-B-3
台湾锐力REXPOWER电液换向阀部分型号如下：
SWDH-04G-3C2-A22D SWDH-04G-3C3-A22D SWDH-04G-3C4-A22D
SWDH-04G-3C5-A22D SWDH-04G-3C6-A22D SWDH-04G-3C9-A22D
SWDH-04G-3C7-A22D SWDH-04G-3C8-A22D SWDH-04G-3C10-A22D
SWDH-04G-3C12-A22D SWDH-04G-2D2-A22D SWDH-04G-2D3-A22D
SWDH-04G-3C11-A22D SWDH-04G-3C40-A22D SWDH-04G-3C60-A22D
SWDH-04G-2D8-A22D SWDH-04G-2B10A-A22D
SWDH-04G-2B2-A22D SWDH-04G-2B3-A22D SWDH-04G-2B8-A22D （1486）
SWDH-04G-2B2B-A22D SWDH-04G-2B3B-A22D SWDH-04G-2B4B-A22D
SWDH-04G-2B2S-A22D SWDH-04G-2B3S-A22D SWDH-04G-2B2A-A22D
SWDH-04G-2B3A-A22D SWDH-04G-2B11B-A22D SWDH-04G-2B12B-A22D
SWDH-04G-2B9B-A22D SWDH-04G-2B60B-A22D SWDH-04G-2B9A-A22D
SWDH-04G-3C2-A11D SWDH-04G-3C3-A11D SWDH-04G-3C4-A11D
SWDH-04G-3C5-A11D SWDH-04G-3C6-A11D SWDH-04G-3C9-A11D
SWDH-04G-3C7-A11D SWDH-04G-3C8-A11D SWDH-04G-3C10-A11D
SWDH-04G-3C12-A11D SWDH-04G-2D2-A11D SWDH-04G-2D3-A11D
SWDH-04G-3C11-A11D SWDH-04G-3C40-A11D SWDH-04G-3C60-A11D
SWDH-04G-2D8-A11D SWDH-04G-2B10A-A11D
SWDH-04G-2B2-A11D SWDH-04G-2B3-A11D SWDH-04G-2B8-A11D
SWDH-04G-2B2B-A11D SWDH-04G-2B3B-A11D SWDH-04G-2B4B-A11D
SWDH-04G-2B2S-A11D SWDH-04G-2B3S-A11D SWDH-04G-2B2A-A11D
SWDH-04G-2B3A-A11D SWDH-04G-2B11B-A11D SWDH-04G-2B12B-A11D
SWDH-04G-2B9B-A11D SWDH-04G-2B60B-A11D SWDH-04G-2B9A-A11D
SWDH-04G-3C2-D24D SWDH-04G-3C3-D24D SWDH-04G-3C4-D24D
SWDH-04G-3C5-D24D SWDH-04G-3C6-D24D SWDH-04G-3C9-D24D
SWDH-04G-3C7-D24D SWDH-04G-3C8-D24D SWDH-04G-3C10-D24D
SWDH-04G-3C12-D24D SWDH-04G-2D2-D24D SWDH-04G-2D3-D24D
SWDH-04G-3C11-D24D SWDH-04G-3C40-D24D SWDH-04G-3C60-D24D
SWDH-04G-2D8-D24D SWDH-04G-2B10A-D24D
当二位二通阀通电时，系统不处于卸荷状态，油缸将会动作。
这种卸荷回路只适用于小流量的系统，因为二位二通阀一般流量范围不是很大。