北京華德?lián)Q向閥部分型號(hào)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
液壓電磁閥是指液壓傳動(dòng)中用來(lái)控制液體壓力﹑流量和方向的元件。其中控制壓力的稱(chēng)為壓力控制閥，控制流量的稱(chēng)為流量控制閥，控制通﹑斷和流向的稱(chēng)為方向控制閥。
1.壓力控制閥按用途分為溢流閥﹑減壓閥和順序閥。
(1)溢流閥：能控制液壓系統(tǒng)在達(dá)到調(diào)定壓力時(shí)保持恒定狀態(tài)。用於過(guò)載保護(hù)的溢流閥稱(chēng)為安全閥。當(dāng)系統(tǒng)發(fā)生故障，壓力升高到可能造成破壞的限定值時(shí)，閥口會(huì)打開(kāi)而溢流，以保證系統(tǒng)的安全。
(2)減壓閥：能控制分支回路得到比主回路油壓低的穩(wěn)定壓力。減壓閥按它所控制的壓力功能不同，又可分為定值減壓閥(輸出壓力為恒定值)﹑定差減壓閥(輸入與輸出壓力差為定值)和定比減壓閥(輸入與輸出壓力間保持 定的比例)。
(3)順序閥：能使 個(gè)執(zhí)行元件(如液壓缸﹑液壓馬達(dá)等)動(dòng)作以后，再按順序使其他執(zhí)行元件動(dòng)作。油泵產(chǎn)生的壓力 推動(dòng)液壓缸1運(yùn)動(dòng)，同時(shí)通過(guò)順序閥的進(jìn)油口作用在面積A 上，當(dāng)液壓缸1運(yùn)動(dòng)完全成后，壓力升高，作用在面積A 的向上推力大於彈簧的調(diào)定值后，閥芯上升使進(jìn)油口與出油口相通，使液壓缸2運(yùn)動(dòng)。
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