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北京华德换向阀部分型号如下：
4WE6P61B/CG12N9Z5L 4WEH10G20B/6EW220-50NZ4
4WE6P61B/CG12NDKL 4WEH10G20B/6EW220-50NZ5
4WE6P61B/CG12NDL 4WEH10G20B/6EW220-50NZ5L
4WE6P61B/CG12NK4 4WEH10H20B/6EG24NETZ4
4WE6P61B/CG12NZ4 4WEH10H20B/6EG24NETZ5
4WE6P61B/CG12NZ5 4WEH10H20B/6EG24NETZ5L
4WE6P61B/CG12NZ5L 4WEH10H20B/6EG24NEZ4
4WE6P61B/CG24N9DKL 4WEH10H20B/6EG24NEZ5
4WE6P61B/CG24N9DL 4WEH10H20B/6EG24NEZ5L
4WE6P61B/CG24N9K4 4WEH10H20B/6EG24NTZ4
4WE6P61B/CG24N9Z4 4WEH10H20B/6EG24NTZ5
4WE6P61B/CG24N9Z5 4WEH10H20B/6EG24NTZ5L
4WE6P61B/CG24N9Z5L 4WEH10H20B/6EG24NZ4
4WE6P61B/CG24NDKL 4WEH10H20B/6EG24NZ5
4WE6P61B/CG24NDL 4WEH10H20B/6EG24NZ5L
4WE6P61B/CG24NK4 4WEH10H20B/6EW220-50NETZ4
4WE6P61B/CG24NZ4 4WEH10H20B/6EW220-50NETZ5
4WE6P61B/CG24NZ5 4WEH10H20B/6EW220-50NETZ5L
4WE6P61B/CG24NZ5L 4WEH10H20B/6EW220-50NEZ4
4WE6P61B/CW220-50N9DKL 4WEH10H20B/6EW220-50NEZ5
4WE6P61B/CW220-50N9DL 4WEH10H20B/6EW220-50NEZ5L
4WE6P61B/CW220-50N9K4 4WEH10H20B/6EW220-50NTZ4
4WE6P61B/CW220-50N9Z4 4WEH10H20B/6EW220-50NTZ5
4WE6P61B/CW220-50N9Z5 4WEH10H20B/6EW220-50NTZ5L
4WE6P61B/CW220-50N9Z5L 4WEH10H20B/6EW220-50NZ4
4WE6P61B/CW220-50NDKL 4WEH10H20B/6EW220-50NZ5
4WE6P61B/CW220-50NDL 4WEH10H20B/6EW220-50NZ5L
六通换向阀主要由阀体、密封组件、凸轮、阀杆、手柄和阀盖等零部件组成(图1)。阀门由手柄驱动，通过手柄带动阀杆与凸轮旋转，凸轮具有定位驱动与锁定密封组件的开启与关闭功能。手柄逆时针旋转，两组密封组件分别在凸轮的作用下关闭下端的两个通道，上端的两个通道分别与管道装置的进口相通。反之，上端的两个通道关闭，下端两个通道与管道装置的进口相通，实现了不停车换向。
六通换向阀
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