德國(guó)Rexroth力士樂比例方向閥包括先導(dǎo)閥和主閥兩個(gè)部分；先導(dǎo)閥包括左右比例電磁鐵、閥體、設(shè)于閥體內(nèi)的閥芯；主閥包括主閥體和位于其中的閥芯，其特征在于：所述的先導(dǎo)閥閥體內(nèi)設(shè)一橫向油道，其兩端連接左右比例電磁鐵頂桿油腔，該油道中部設(shè)有回油孔，進(jìn)入左右比例電磁鐵頂桿油腔的端口均設(shè)阻尼螺釘；主閥體的控制油口經(jīng)閥體內(nèi)的油道與先導(dǎo)閥閥體中部設(shè)的控制油道相通，該油道止路于先導(dǎo)閥閥體兩個(gè)環(huán)形沉割槽，先導(dǎo)閥芯的二個(gè)臺(tái)肩上均設(shè)有節(jié)流窗口。本實(shí)用新型結(jié)構(gòu)新穎、比例電磁鐵所需推力小、密封要求低，有利于提高使用壽命、降低生產(chǎn)成本，可廣泛應(yīng)用于塑機(jī)行業(yè)及機(jī)械加工設(shè)備的液壓控制系統(tǒng)中。
    力士樂4WRE（E）型比例方向閥的特點(diǎn)：直控式比例換向閥可以控制液流的方向和大??；閥的控制通過(guò)帶中心螺紋的比例電磁鐵實(shí)現(xiàn)，線圈可單獨(dú)拆卸；帶電反饋；板式連接結(jié)構(gòu) 孔型符合：DIN 24 340 , A 型，ISO 4401  和 CETOP-RP 121 H；控制閥芯由彈簧對(duì)中；力士樂4WREE型帶內(nèi)置放大器，接口形式為A1或F1；4WRE型使用的放大器：數(shù)字式放大器VT-VRPD-2-1X/V0/0和模擬式放大器VT-VRPA2-，-1X。
    力士樂4WRE（E）型 二位四通和三位四通比例方向閥為直控，板式結(jié)構(gòu)；由比例電磁鐵操作，比例電磁鐵帶中心螺紋，線圈可單獨(dú)拆卸，電磁鐵的控制可通過(guò)外部放大器（WRE型）或內(nèi)置的放大器（WREE型）。
    下面我以力士樂4WREE10E75-2X/G24K31/A1V舉例來(lái)加深大家對(duì)這個(gè)Rexroth三位四通直動(dòng)式比例方向閥的了解。
    4WRE →直控式比例換向閥，板式結(jié)構(gòu)
    E    →帶內(nèi)置放大器（無(wú)E可通過(guò)連接外部放大器）
    10   → 10通經(jīng)（也有6通經(jīng)等）
    E    →機(jī)能符號(hào)（也有E1-、V、W、W1-、EA、WA等）
    75   →閥的壓差為10bar時(shí)的額定流量(NS10) 75 L/min （也有(NS6)08、16、32，(NS10)25、50、75等）
    2X   →20至29系列（20至29：安裝和連接尺寸不變）
    G24  →24V直流電源
    K31  →帶符合E DIN43563-AM6-3的插座,不帶插頭 插頭需單獨(dú)訂貨(K4指帶符合DIN43650-AM2的插座不帶插頭)
    A1   →WREE型A1或F1接口：給定值輸入±10 V(F1=給定值輸入4至20mA)
    V    →氟橡膠矩形密封圈 符合DIN 51 524 標(biāo)準(zhǔn)的液壓油（HL,HLP）
    Rexroth三位四通直動(dòng)式比例方向閥訂貨號(hào)-型號(hào)對(duì)應(yīng)表：
    訂貨號(hào)           型     號(hào)                          訂貨號(hào)           型     號(hào)
    R901161258 4WREE6E32-2X/G24K31/A1V-204      R901028415 4WREE10R3-75-2X/G24K31/A1V
    R900617766 4WREE6WA16-2X/G24K31/F1V         R900617482 4WREE6E1-16-2X/G24K31/F1V
    R900617269 4WREE10V75-2X/G24K31/F1V         R900617253 4WREEM6E32J-2X/G24K34/B6V-687
    R900582331 4WRE10E16-1X/24K4/M              R900576935 4WRE10E32-1X/24K4/M-402
    R900551280 4WRE6W1-08-1X/24K4/M             R900549113 4WRE10E1-32-1X/24K4/M
    R900487026 4WRE6W32-1X/24Z4/M               R900461236 4WRE10W1-16-1X/24K4/M
    R901136691 4WREQ6Q5-08-2X/V5C-24PF60        R901135153 4WREE6V08-2X=G24K31/F1V-876
    R901135118 4WREE10W75-2X/G24K31/A1V-280     R901132085 4WREQ6Q5-32-2X/V4A-24PF60
    R901131081 4WREQ6V08-2X/V8F-24CA60          R901131077 4WREQ10V25-2X/V8F-24CA60
    R901130450 4WREE10W1-75-2X/G24K31/A1V-660   R901130447 4WREE6E16-2X/G24K31/A1V-660
    R901127151 4WREE10W25-2X/G24K31/A1V-280     R901126284 4WREE10E50-2X/G24K31/A1V-280
    R901125908 4WREF6E32-2X/V-24PA1             R901125120 4WREE6V08-2X/G24K31/A1V-742
    R901120444 4WREE10V1-75-2X/G24K31/A0V-907   R901116919 4WREE6Q5-32-2X/G24K31/A1V=DE
    R901113546 4WREE10Q00-2X/G24K31/A1V-598=DE  R901113540 4WREE6Q00-2X/G24K31/A1V-598=DE
    R901113345 4WREE10Q5-50-2X/G24K31/A1V=DE    R901112728 4WREE10E25-2X/G24K31/A1V-280
    R901109650 4WREE6V32-2X/G24K31/F1V-876      R901107901 4WREE6V16-2X=G24K31/F1V-876
    R901104507 4WREE10W75-2X/G24K31/F1V-742     R901103279 4WREQ6Q5-08-2X/V4C-24CA60
    R901102113 4WREQ6V16-2X/V5F-24CF60          R901102112 4WREQ6Q5-16-2X/V5F-24CF60
    R901100120 4WREE10E75-2X/G24K31/A1V-660     R901100118 4WREE10W1-50-2X/G24K31/A1V-660
    R901095159 4WREE6Q00-2X/G24K31/A1V-598      R901091639 4WREE6V16-2X/G24K31/F1V-876
    R901075515 4WRE6W32-1X/24K4/M-298           R901089537 4WREQ6Q5-16-2X/V8C-24PA60
    R901086329 4WRE10WA50-2X/G24K4/V            R901085278 4WREE6V32-2X/G24K31/A1V-742
    R901076729 4WREE6V32-2X=G24K31/A1V-826      R901071989 4WREE10V75-2X=G24K31/A1V-826
    R901071988 4WREE10V50-2X=G24K31/A1V-826     R901071987 4WREE6V16-2X=G24K31/A1V-826
    R901071985 4WREE6V08-2X=G24K31/A1V-826      R901071941 4WRE10E3-75-2X/G24K4/V-660
    R901068955 4WREE6V16-2X/G24K31/A1V-826      R901066667 4WREE10E1-25-2X/G24K31/F1V
    R901066046 4WREE10Q5-50-2X/G24K31/A1V       R901063517 4WREF10E3-50-2X/V-24CA1
    R901063172 4WREE6EB08-2X/G24K31/F1V         R901063131 4WREE10WA50-2X/G24K31/F1V
    R901060222 4WREE10V75-2X/G24K31/A1V-826
    R901060996 4WREE10WA25-2X/G24K31/F1V
    R901048036 4WRE10E3-75-2X/G24K4/V
    R901046128 4WREE6V32-2X/G24K31/A1V-826
    R901037664 4WREEM6W1-32-2X/G24K34/B6V
    R901037662 4WREEM6E1-32-2X/G24K34/B6V
    R901037424 4WREE10R75-2X/G24K31/A1V
    R901036556 4WRE6V16-2X/G24K4/V-822
    R901036403 4WREEM10E50J-2X/G24K34/B6V-735
    R901032028 4WRE6V08-2X/G24K4/V-822
    R901031274 4WRE6E04-2X/G24K4/V
    R901030897 4WRE10WA75-2X/G24K4/V
    R901030889 4WREEM10W1-50-2X/G24K34/B6V
    R901028415 4WREE10R3-75-2X/G24K31/A1V
   
    R901026320 4WRE10E50-2X/G24K4/V-93
    R901026647 4WREE10V75-2X/G24K31/A1V-821
    R901024870 4WREE10V1-75-2X/G24K31/F1V
    R901017446 4WRE10V1-50-2X/G24K4/V
    R901015837 4WRE10E25-2X/G24K4/V-93
    R901011624 4WRE6WA32-2X/G24K4/V
    R901008711 4WREE10W25-2X/G24K31/A1V-742
    R901008709 4WREE10E25-2X/G24K31/A1V-742
    R901008707 4WREEM10W75-2X/G24K34/B6V
    R901007660 4WREE10R75-2X/G24K31/F1V-741
    R901005786 4WREEM6W32-2X/G24K34/B6V
    R901002587 4WREE10WA75-2X/G24K31/A1V
    R900979114 4WRE6E00-1X/24K4/M-119
    R900978573 4WRE10E1-64-1X/24K4/M-264
    R900978168 4WREE6E04-2X/G24K31/F1V
    R900976811 4WREE6E1-08-2X/G24K31/F1V
    R900976334 4WREE10V1-25-2X/G24K31/F1V
    R900976331 4WREE6V04-2X/G24K31/F1V
    R900976330 4WREE10EA75-2X/G24K31/F1V
    R900976119 4WREE10W1-75-2X/G24K31/F1V
    R900975077 4WREEM6E08J-2X/G24K34/B6V-687
    R900975075 4WREEM6E16J-2X/G24K34/B6V-687
    R900975074 4WREEM10E50J-2X/G24K34/B6V-687
    R900974914 4WREE6E32-2X/G24K31/A1V-280
    R900974247 4WREE6WA16-2X/G24K31/A1V
    R900974228 4WREE6E08-2X/G24K31/A1V-280
    R900974227 4WREE10W50-2X/G24K31/A1V-280
    R900974152 4WRE10W1-25-2X/G24K4/V
    R900973482 4WREE6WA08-2X/G24K31/A1V
    R900973289 4WREE6EA16-2X/G24K31/F1V
    R900971420 4WREE10EA50-2X/G24K31/F1V
    R900970875 4WRE6E32-1X/24K4/M-254
    R900970194 4WRE10E2-32-1X/24K4/M
    R900970089 4WREE10E1-75-2X/G24K31/F1V
    R900969501 4WREE10W75-2X/G24K31/A1V=DE
    R900969483 4WREE6W32-2X/G24K31/A1V=DE
   
    R900969351 4WRE10EA75-2X/G24K4/V
    R900969321 4WREE10W3-75-2X/G24K31/A1V
    R900968149 4WRE6E1-08-2X/G24K4/V
    R900967790 4WREE10EA25-2X/G24K31/A1V
    R900967564 4WREE6W04-2X/G24K31/F1V
    R900967483 4WRE6M16-1X/24K4/M
    R900967470 4WRE10E32-1X/24K4/M-120
    R900966805 4WRE6V1-16-2X/G24K4/V
    R900965753 4WRE10EA16-1X/24K4/M-120
    R900965507 4WRE10EA64-1X/24K4/M-468
    R900965492 4WRE10WA64-1X/24K4/V
    R900965434 4WRE6WA16-2X/G24K4/V
    R900965197 4WRE10WA16-1X/24K4/M
    R900965185 4WREE10W1-50-2X/G24K31/F1V
    R900965071 4WREE6W1-08-2X/G24K31/F1V
    R900964934 4WREE6WA32-2X/G24K31/F1V
    R900964078 4WREE6EB32-2X/G24K31/F1V
    R900963884 4WRE10E1-16-1X/24K4/M
    R900963483 4WREE10WA75-2X/G24K31/F1V
    R900962497 4WRE10E2-64-1X/24K4/M
    R900962405 4WREE10W1-25-2X/G24K31/F1V
    R900962181 4WREE6E32-2X/G24K31/A1V-655
    R900961534 4WRE6V1-08-1X/24K4/M
    R900961301 4WRE10EA32-1X/24K4/M-120
    R900961125 4WRE6WA08-1X/24K4/M
    R900960668 4WRE6E1-08-1X/24K4/M
    R900960226 4WRE6W00-1X/24K4/M-119
    R900960160 4WRE6WA16-1X/24K4/M-303
   
    R900959689 4WRE6W3-32-1X/24K4/M
    R900958851 4WRE10EA64-1X/24K4/M-193
    R900958777 4WRE6W00-1X/24K4/M-268
    R900958157 4WREE10E1-25-2X/G24K31/A1V
    R900957259 4WREE10E50-2X/G24K31/A1V-655
    R900956574 4WREE10E25-2X/G24K31/F1V
    R900956470 4WRE10EA64-1X/24K4/V
    R900956458 4WREE10W1-25-2X/G24K31/A1V
    R900955406 4WRE10W64-1X/24K4/V
    R900955393 4WRE10WA64-1X/24K4/M
    R900954117 4WRE10V75-2X/G24K4/V
    R900954116 4WRE10V50-2X/G24K4/V
    R900954115 4WRE10V25-2X/G24K4/V
    R900954114 4WRE10W1-75-2X/G24K4/V
   
    R900954113 4WRE10W1-50-2X/G24K4/V
    R900954107 4WRE10W75-2X/G24K4/V
    R900954106 4WRE10W50-2X/G24K4/V
    R900954105 4WRE10W25-2X/G24K4/V
    R900954104 4WRE10E1-75-2X/G24K4/V
    R900954103 4WRE10E1-50-2X/G24K4/V
    R900954102 4WRE10E75-2X/G24K4/V
    R900954101 4WRE10E50-2X/G24K4/V
    R900954100 4WRE10E25-2X/G24K4/V
    R900954099 4WRE6V32-2X/G24K4/V
    R900954098 4WRE6V16-2X/G24K4/V
    R900954097 4WRE6V08-2X/G24K4/V
    R900954096 4WRE6W1-32-2X/G24K4/V
    R900954095 4WRE6W1-16-2X/G24K4/V
    R900954094 4WRE6E1-32-2X/G24K4/V
    R900954093 4WRE6E1-16-2X/G24K4/V
    R900954092 4WRE6E16-2X/G24K4/V
    R900953729 4WRE6W1-08-2X/G24K4/V
    R900953102 4WREE10W25-2X/G24K31/F1V
    R900953026 4WRE6W1-08-1X/24K4/V
    R900953025 4WRE10E2-64-1X/24K4/M-402
    R900952239 4WREE10E75-2X/G24K31/A1V-655
    R900951018 4WRE10EA32-1X/24K4/M
    R900950902 4WREE10V1-75-2X/G24K31/A1V
    R900950416 4WREE6W16-2X/G24K31/F1V
    R900950365 4WREE10V1-25-2X/G24K31/A1V
    R900950342 4WREE6E16-2X/G24K31/A1V-655
    R900950341 4WREE6E08-2X/G24K31/A1V-655
    R900950317 4WREE6EA08-2X/G24K31/A1V
   
    R900949899 4WREE6V1-16-2X/G24K31/F1V
    R900949863 4WREE6V1-08-2X/G24K31/F1V
    R900949806 4WREE10W50-2X/G24K31/F1V
    R900949708 4WRE10W00-1X/24K4/M-174
    R900949222 4WREE6E1-32-2X/G24K31/F1V
    R900949106 4WRE10W00-1X/24K4/M-173
    R900948412 4WREE6X00-2X/G24K31/F1V-652
    R900948360 4WREE10W75-2X/G24K31/F1V
    R900947990 4WRE10W2-32-1X/24K4/M
    R900947410 4WRE6E16-1X/24K4/V
    R900947314 4WRE10W64-1X/24K4/M-646
    R900947313 4WRE10E64-1X/24K4/M-646
    R900947277 4WRE6W1-16-1X/24K4/V
    R900946397 4WRE6E00-1X/24K4/M-165
    R900945615 4WRE6EA16-1X/24K4/M
    R900944924 4WRE6V00-1X/24K4/M-165
    R900944121 4WRE6W16-2X/G24K4/V
    R900943804 4WREE10V1-50-2X/G24K31/A1V
    R900943381 4WRE10W2-64-1X/24K4/M
    R900943348 4WRE6W16-1X/24K4/V
    R900943272 4WRE10EA64-1X/24K4/M-120
    R900943094 4WREE10E50-2X/G24K31/F1V
    R900942574 4WRE10E64-1X/24K4/M-402
    R900942153 4WRE10E16-1X/24K4/V
    R900941623 4WREE6E16-2X/G24K31/F1V
    R900941264 4WRE6W08-2X/G24K4/V
    R900940561 4WREE6V16-2X/G24K31/F1V
    R900940191 4WREE10EA75-2X/G24K31/A1V
    R900939866 4WREE10EA50-2X/G24K31/A1V
    R900939627 4WREE6W1-16-2X/G24K31/A1V
    R900938420 4WREE6E04-2X/G24K31/A1V
    R900937147 4WREE6EA08-2X/G24K31/F1V
    R900937065 4WREE6W1-16-2X/G24K31/F1V
    R900936357 4WREE6V04-2X/G24K31/A1V
    R900935426 4WREE6V1-08-2X/G24K31/A1V
    R900934746 4WRE10W3-32-1X/24K4/M
    R900934607 4WRE10E3-64-1X/24K4/M
    R900934365 4WRE10E32-1X/24K4/V
    R900933794 4WREE6E1-08-2X/G24K31/A1V
    R900933480 4WRE6W32-2X/G24K4/V
    R900933478 4WRE6E08-2X/G24K4/V
    R900933476 4WREE6W1-32-2X/G24K31/F1V
    R900933474 4WRE10W1-64-1X/24K4/V
    R900933473 4WRE10E64-1X/24K4/V
    R900933077 4WREE10W1-50-2X/G24K31/A1V
    R900933076 4WREE10E1-50-2X/G24K31/A1V
    R900933075 4WREE10V25-2X/G24K31/A1V
    R900933074 4WREE10W25-2X/G24K31/A1V
    R900933073 4WREE10E25-2X/G24K31/A1V
   
    R900933044 4WRE6W1-32-1X/24K4/V
    R900932498 4WREE6EB32-2X/G24K31/A1V
    R900931371 4WREE10W50-2X/G24K31/A1V
    R900931195 4WREE6V1-16-2X/G24K31/A1V
    R900930845 4WRE6W1-16-1X/24K4/M
    R900930498 4WRE6V32-1X/24K4/M
    R900929889 4WREE6EA32-2X/G24K31/F1V
    R900929827 4WREE6W1-08-2X/G24K31/A1V
    R900929575 4WRE10W3-64-1X/24K4/M
    R900929205 4WREE6W2-32-2X/G24K31/A1V
    R900928726 4WREE6E08-2X/G24K31/F1V
    R900928553 4WREE6E1-32-2X/G24K31/A1V
    R900928015 4WRE6E1-32-1X/24K4/M
    R900927356 4WREE10E75-2X/G24K31/F1V
    R900927236 4WREE10Q2-75-2X/G24K31/A1V
    R900927235 4WREE10V50-2X/G24K31/A1V
    R900927234 4WREE10W1-75-2X/G24K31/A1V
    R900927233 4WREE10W75-2X/G24K31/A1V
    R900927232 4WREE10E1-75-2X/G24K31/A1V
    R900927231 4WREE10E50-2X/G24K31/A1V
    R900927230 4WREE10E75-2X/G24K31/A1V
    R900926997 4WREE6WA32-2X/G24K31/A1V
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