北京華德換向閥部分型號如下：
4WE6E61B/CG12NZ4 4WE6V50B/AG24N
4WE6E61B/CG24N9DKL 4WE6V50B/AW220-50N
4WE6E61B/CG24N9DL 4WE6V50B/BG24N
4WE6E61B/CG24N9K4 4WE6V50B/BW220-50N
4WE6E61B/CG24N9Z4 4WE6V61B/CG12N9DKL
4WE6E61B/CG24N9Z5L 4WE6V61B/CG12N9DL
4WE6E61B/CG24NDKL 4WE6V61B/CG12N9Z5
4WE6E61B/CG24NDL 4WE6V61B/CG12N9Z5L
4WE6E61B/CG24NK4 4WE6V61B/CG12NDKL
4WE6E61B/CG24NZ4 4WE6V61B/CG12NDL
4WE6E61B/CW220-50N9DKL 4WE6V61B/CG12NK4
4WE6E61B/CW220-50N9DL 4WE6V61B/CG12NZ5
4WE6E61B/CW220-50N9K4 4WE6V61B/CG12NZ5L
4WE6E61B/CW220-50N9Z4 4WE6V61B/CG24N9DKL
4WE6E61B/CW220-50N9Z5L 4WE6V61B/CG24N9DL
4WE6E61B/CW220-50NDKL 4WE6V61B/CG24N9Z5
4WE6E61B/CW220-50NDL 4WE6V61B/CG24N9Z5L
4WE6E61B/CW220-50NK4 4WE6V61B/CG24NDKL
4WE6E61B/CW220-50NZ4 4WE6V61B/CG24NDL
4WE6F50B/AG24N 4WE6V61B/CG24NK4
4WE6F50B/AW220-50N 4WE6V61B/CG24NZ5
4WE6F50B/BG24N 4WE6V61B/CG24NZ5L
4WE6J61B/CG12N9DL 4WEH10D20B/6EW220-50NETZ4
4WE6J61B/CG12N9Z4 4WEH10D20B/6EW220-50NETZ5
4WE6J61B/CG12N9Z5 4WEH10D20B/6EW220-50NETZ5L
4WE6J61B/CG12N9Z5L 4WEH10D20B/6EW220-50NEZ4
4WE6J61B/CG12NDKL 4WEH10D20B/6EW220-50NEZ5
4WE6J61B/CG12NDL 4WEH10D20B/6EW220-50NEZ5L
4WE6J61B/CG12NZ4 4WEH10D20B/6EW220-50NTZ4
4WE6J61B/CG12NZ5 4WEH10D20B/6EW220-50NTZ5
4WE6J61B/CG12NZ5L 4WEH10D20B/6EW220-50NTZ5L
4WE6J61B/CG24N9DKL 4WEH10D20B/6EW220-50NZ4
4WE6J61B/CG24N9DL 4WEH10D20B/6EW220-50NZ5
4WE6J61B/CG24N9Z4 4WEH10D20B/6EW220-50NZ5L
4WE6J61B/CG24N9Z5 4WEH10E20B/6AW220-50NETZ4
4WE6J61B/CG24N9Z5L 4WEH10E20B/6AW220-50NETZ5
4WE6J61B/CG24NDKL
4WEH10E20B/6AW220-50NETZ5L
三位五通電磁換向閥的工作原理：三位五通顧名思義，三個工作位置，五個口。 三位五通電磁閥“Y”為中泄式；“P”為中壓式；中封式省略標注。防爆型電磁閥門在訂貨號后加注“EX”。
三個位置是指電磁閥的閥芯有三個位置。三位電磁閥都是有兩個線圈的。我們暫且稱之為A和B線圈。AB都不通電的時候閥芯是 個位置，A通電時閥芯會動作，這是 二個位置，A斷電，B通電的時候閥芯的位置是 三個位置。所以 共三個位置。請注意三位五通電磁閥有三種，指AB都不通電的時候閥芯的狀態不同分為中封，中開和中閉。你可以看下面的圖片現實的是中閉型三位五通閥。
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