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比例電磁鐵的類型按照工作原理主要分為
如下幾類:
(1)力控制型
這類電磁鐵的行程短，只有1 5mm,輸出力與輸入電流成正比,常用在比例閥的先導控制級
上:
(2)行程控制型
由力控制型加負載彈簧共同組成，電磁鐵輸出的力通過彈簧轉換成輸出位移,輸出位移與輸入電流成正比，工作行程達3mm,線性好，可以用在直控式比例閥上;
(3)位置調節型
銜鐵的位置由傳感器檢測后,發出一個閥內反饋信號,在閥內進行比較后重新調節銜鐵的位置。閥內形成閉環控制,精度高,銜鐵的位置與力
無關，精度高的比例閥如德國的博世意大利的阿托斯等都采用這種結構。
比例閥與放大器配套使用放大器采用電流負反饋,設置斜坡信號發生器階躍函數發生器、PD調節器反向器等,控制升壓降壓時間或運動加速度及減速度。斷電時, 能使閥芯處于安全位置。
比例電磁鐵和液壓閥組成電液比例閥。由于比例電磁鐵可以在不同的電流下得到不同的力(或行程),因此可以無級改變壓力、流量。故比例電磁鐵是比例閥的關鍵元件。

(1)比例環節
比例環節也稱為無慣性環節,對液壓缸或馬達，忽略液壓油的可壓縮性和泄漏,液壓缸的流量Q= VA。其中V為活塞速度;A為活塞面積。其傳遞函數為: g(s)= V (s)/Q(s)= 1/A =式中K為比例環節放大系數或增益,表示輸入量經過放大K倍后輸出。
(2)比例控制系統
比例控制系統根據有無反饋分為開環控制和閉環控制。如比例閥控制液壓缸或馬達系統可以實現速度位移轉速和轉矩等的控制。
由于開環控制系統的精度比較低,無級調節系統輸入量就可以無級調節系統輸出量力速度以及加減速度等。這種控制系統的結構組成簡單,系統的輸出端和輸入端不存在反饋回路,系統輸出量對系統輸入控制作用沒有影響,沒有自動糾正偏差的能力,其控制精度主要取決于關鍵元器件的特性和系統調整精度，所以只能應用在精度要求不高并且不存在內外干擾的場合。開環控制系統一.般不存在所謂穩定性問題。
閉環控制系統(即反饋控制系統)的優點是對內部和外部干擾不敏感，系統工作原理是反饋控制原理或按偏差調整原理。這種控制系統有通
過負反饋控制自動糾正偏差的能力。但反饋帶來了系統的穩定性問題，只要系統穩定，閉環控制系統可以保持較高的精度。因此, 目前普遍采用閉環控制系統。

(1)根據用途和被控對象選擇比例閥的類型;
(2)正確了解比例閥的動靜態指標主要有額定輸出流量、起始電流滯環重復精度額定壓力損失溫飄、響應特性頻率特性等;
(3)根據執行器的工作精度要求選擇比例閥的精度,內含反饋閉環閥的穩態性動態品質好。如果比例閥的固有特性如滯環非線性等無法使被控系統達到理想的效果時,可以使用軟件程序改善系統的性能;
(4)如果選擇帶先導閥的比例閥，要注意先導閥對油液污染度的要求。-般應符合ISO 18/5標準,并在油路上加裝過濾精度為10um以下的進油過濾器;
(5)比例閥的通徑應按執行器在高速度時通過的流量來確定,通徑選得過大，會使系統的分辨率降低:
(6)比例閥必須使用與之配套的放大器,閥與放大器的距離應盡可能地短。

電液比例閥是采用了比例控制技術,介于開關型液壓閥和電液伺服閥之間的-種液壓元件,在工業生產中獲得了廣泛的應用,輸入的電信號有模擬式和數字式兩大類,可以用于控制位置(轉角)、速度(轉速)、加速度(角加速度)、壓力(壓差)、力(力矩)等參數。電液比例閥等元件可以組成如下三類控制回路和系統
(1)電液比例壓力控制回路和系統。例如:用于帶鋼熱連軋機卷取機液壓輔助系統的電液比例壓力控制回路,用于板帶軋機輥縫控制的液壓推上系統電液比例壓力控制回路,用于帶材卷取設備恒張力的閉環電液比例壓力控制回路;
(2)電液比例流量控制回路和系統。例如:用于帶鋼熱連軋機精軋機平衡液壓系統的電液比例壓力控制回路,用于機床微進給的電液比例控制回路,用于旋壓機折板機同步的電液比例控制回路,用于電梯的電液比例控制回路;
(3)電液比例多參數控制回路和系統。例如:用于帶鋼熱連軋機精軋換輥液壓系統的電液比例壓力控制回路,用于液壓缸垂直配置而采用wI型閥芯的比例控制回路,用于熱軋鋼卷步進鏈式運輸機的速度、加減速度控制回路。

電液比例閥是閥內比例電磁鐵輸入電壓信號產生相應動作，使工作閥閥芯產生位移，閥口尺寸發生改變并以此完成與輸入電壓成比例壓力、流量輸出元件。閥芯位移也可以以機械、液壓或電形式進行反饋。電液比例閥具有形式種類多樣、容易組成使用電氣及計算機控制各種電液系統、控制精度高、安裝使用靈活以及抗污染能力強等多方面優點，應用領域日益拓寬。近年研發生產插裝式比例閥和比例多路閥充分考慮到工程機械使用特點，具有先導控制、負載傳感和壓力補償等功能。它出現對移動式液壓機械整體技術水平提升具有重要意義。特別是電控先導操作、無線遙控和有線遙控操作等方面展現了其良好應用前景。
力士樂0811404766比例閥4WRPE10CB80L-20/G24K0/F1M-810
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力士樂REXROTH伺服電磁閥，帶電氣位置反饋（LVDT的直流/直流±10 V）4WRPH 10
R901238071 4WRPH10CX50L-2X/G24K0/M-950
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0811404066 4WRPH10KB120P-20/G24Z4/M
力士樂REXROTH電氣位置反饋的高響應閥（LVDT的直流/直流）（設計：堅固耐用的）4WRPH..2X..-750
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力士樂REXROTH高響應方向閥，直動式、帶電氣位置反饋和集成電子放大版（OBE）4WRPEH 6 -2X
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0811404615 4WRPEH6C3B12L-2X/G24K0/A1M-818
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R901402817 4WRPEH6C3B24L-2X/G24K0/A1M=KM
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R901208916 4WRPEH6C3B24L-2X/G24K0/A1V-936
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0811404633 4WRPEH6C3B24L-2X/G24K0/F1M
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R901179244 4WRPEH6C3B24L-2X/G24K0/F1V
R901208917 4WRPEH6C3B24L-2X/G24K0/F1V-936
0811404643 4WRPEH6C3B25P-2X/G24K0/A1M
0811404635 4WRPEH6C3B25P-2X/G24K0/B5M
R901348422 4WRPEH6C3B25P-2X/G24K0/F1M
0811404603 4WRPEH6C3B40L-2X/G24K0/A1M
0811404609 4WRPEH6C3B40L-2X/G24K0/A1M-816
R901089738 4WRPEH6C3B40L-2X/G24K0/A1M-818
0811404538 4WRPEH6C3B40L-2X/G24K0/A1V
R901172452 4WRPEH6C3B40L-2X/G24K0/A1V-816
0811404735 4WRPEH6C3B40L-2X/G24K0/B5M
0811404634 4WRPEH6C3B40L-2X/G24K0/F1M
R901172455 4WRPEH6C3B40L-2X/G24K0/F1M-816
R901222495 4WRPEH6C3B40L-2X/G24K0/F1V
R901222207 4WRPEH6C3B40L-2X/G24K0/F1V-816
R901P74370 4WRPEH6C3B40L-2X R901174370-PT
0811404644 4WRPEH6C3B40P-2X/G24K0/A1M
R901246814 4WRPEH6C3B40P-2X/G24K0/A1M-303
0811404637 4WRPEH6C3B40P-2X/G24K0/B5M
R901357059 4WRPEH6C3B40P-2X/G24K0/F1M
0811404536 4WRPEH6C3B40P-2X/G24XNZ0/A1V
0811404641 4WRPEH6C4B02L-2X/G24K0/A1M
0811404537 4WRPEH6C4B02L-2X/G24K0/F1M
R901284158 4WRPEH6C4B02L-2X/G24K0/F1V
0811404610 4WRPEH6C4B04L-2X/G24K0/A1M
0811404350 4WRPEH6C4B04L-2X/G24K0/F1M
R901307161 4WRPEH6C4B04L-2X/G24K0/F1V
R901347942 4WRPEH6C4B04P-2X/G24K0/A1M
0811404611 4WRPEH6C4B12L-2X/G24K0/A1M
0811404623 4WRPEH6C4B12L-2X/G24K0/B5M
0811404351 4WRPEH6C4B12L-2X/G24K0/F1M
R901383468 4WRPEH6C4B12L-2X/G24K0/F1V
0811404645 4WRPEH6C4B15P-2X/G24K0/A1M
R901266295 4WRPEH6C4B15P-2X/G24K0/F1M
0811404612 4WRPEH6C4B24L-2X/G24K0/A1M
0811404636 4WRPEH6C4B24L-2X/G24K0/B5M
0811404352 4WRPEH6C4B24L-2X/G24K0/F1M
R901273569 4WRPEH6C4B24L-2X/G24K0/F1V
0811404646 4WRPEH6C4B25P-2X/G24K0/A1M
R901318493 4WRPEH6C4B25P-2X/G24K0/F1M
0811404613 4WRPEH6C4B40L-2X/G24K0/A1M
0811404638 4WRPEH6C4B40L-2X/G24K0/A1V
0811404364 4WRPEH6C4B40L-2X/G24K0/B5M
0811404353 4WRPEH6C4B40L-2X/G24K0/F1M
R901136861 4WRPEH6C4B40L-2X/G24K0/F1V
0811404647 4WRPEH6C4B40P-2X/G24K0/A1M
0811404356 4WRPEH6C4B40P-2X/G24K0/B5M
R901167904 4WRPEH6C4B40P-2X/G24K0/F1M
R901387788 4WRPEH6C4B40L-2X/G24K0/C6V
R901276204 4WRPEH6C5B04L-2X/G24K0/A1M
R901213180 4WRPEH6C5B04L-2X/G24K0/F1M
R901236471 4WRPEH6C5B12L-2X/G24K0/A1M
R901231527 4WRPEH6C5B12L-2X/G24K0/F1M
R901098057 4WRPEH6C5B24L-2X/G24K0/A1M
R901137452 4WRPEH6C5B24L-2X/G24K0/F1M
0811404746 4WRPEH6C5B40L-2X/G24K0/A1M
0811404749 4WRPEH6C5B40L-2X/G24K0/F1M
R901348187 4WRPEH6C5B40L-2X/G24K0/F1V
0811404648 4WRPEH6C5B40P-2X/G24K0/A1M
0811404358 4WRPEH6C6B02L-2X/G24K0/A1M
0811404628 4WRPEH6K3B50P-2X/G24K0/A1M
0811404604 4WRPEH6KB50P-2X/G24K0/A1M
0811404620 4WRPEH6XB24L-2X/G24K0/A1M-743
力士樂REXROTH伺服電磁閥四位四通高頻單向閥門，直接驅動，帶有集成電子和電氣位置反饋（OBE）4WRPEH 6 -3X
R901382520 4WRPEH6CB02L-3X/M/24A1
R901382376 4WRPEH6CB02L-3X/M/24F1
R901382365 4WRPEH6CB04L-3X/M/24A1
R901382374 4WRPEH6CB04L-3X/M/24F1
R901382505 4WRPEH6CB04L-3X/V/24F1
R901382492 4WRPEH6CB04P-3X/M/24A1
R901382334 4WRPEH6CB08P-3X/M/24A1
R901382337 4WRPEH6CB12L-3X/M/24A1
R901382371 4WRPEH6CB12L-3X/M/24F1
R901382530 4WRPEH6CB15P-3X/M/24A1
R901429091 4WRPEH6CB15P-3X/M/24F1
R901381804 4WRPEH6CB24L-3X/M/24A1
R901382372 4WRPEH6CB24L-3X/M/24F1
R901382526 4WRPEH6CB24L-3X/V/24F1
R901382490 4WRPEH6CB25P-3X/M/24A1
R901382353 4WRPEH6CB40L-3X/M/24A1
R901382354 4WRPEH6CB40L-3X/M/24F1
R901438744 4WRPEH6CB40L-3X/V/24A1
R901382630 4WRPEH6CB40P-3X/M/24A1
R901382375 4WRPEH6CB40P-3X/M/24F1
R901382538 4WRPEH6C1B12L-3X/M/24A1
R901436252 4WRPEH6C1B12L-3X/M/24F1
R901382527 4WRPEH6C1B24L-3X/M/24A1
R901382491 4WRPEH6C1B24L-3X/M/24F1
R901423624 4WRPEH6C1B24L-3X/V/24A1
R901382325 4WRPEH6C1B40L-3X/M/24A1
R901382487 4WRPEH6C1B40L-3X/M/24F1
R901382495 4WRPEH6C1B40P-3X/M/24A1
R901396969 4WRPEH6C3B04L-3X/M/24F1-885
R901376972 4WRPEH6C3B24L-3X/V/24F1
R901410492 4WRPEH6C3B40L-3X/M/24A1-15
R901382367 4WRPEH6C3B02L-3X/M/24A1
R901382336 4WRPEH6C3B02L-3X/M/24F1
R901382345 4WRPEH6C3B04L-3X/M/24A1
R901382347 4WRPEH6C3B04L-3X/M/24F1
R901382488 4WRPEH6C3B04L-3X/V/24A1
R901382514 4WRPEH6C3B04L-3X/V/24F1
R901382316 4WRPEH6C3B04P-3X/M/24A1
R901382502 4WRPEH6C3B04P-3X/M/24F1
R901382496 4WRPEH6C3B04P-3X/V/24A1
R901382537 4WRPEH6C3B04P-3X/V/24F1
R901396859 4WRPEH6C3B08L-3X/M/24A1
R901382504 4WRPEH6C3B08L-3X/V/24F1
R901382312 4WRPEH6C3B12L-3X/M/24A1
R901382348 4WRPEH6C3B12L-3X/M/24F1
R901382503 4WRPEH6C3B12L-3X/V/24A1
R901382513 4WRPEH6C3B12L-3X/V/24F1
R901382323 4WRPEH6C3B15P-3X/M/24A1
R901382511 4WRPEH6C3B15P-3X/M/24F1
R901382522 4WRPEH6C3B15P-3X/V/24A1
R901382313 4WRPEH6C3B24L-3X/M/24A1
R901382349 4WRPEH6C3B24L-3X/M/24F1
R901372986 4WRPEH6C3B24L-3X/V/24A1
R901382357 4WRPEH6C3B25P-3X/M/24A1
R901382535 4WRPEH6C3B25P-3X/M/24F1
R901382315 4WRPEH6C3B40L-3X/M/24A1
R901382350 4WRPEH6C3B40L-3X/M/24F1
R901382343 4WRPEH6C3B40L-3X/V/24A1
R901382516 4WRPEH6C3B40L-3X/V/24F1
R901382358 4WRPEH6C3B40P-3X/M/24A1
R901382539 4WRPEH6C3B40P-3X/M/24F1
R901382356 4WRPEH6C4B02L-3X/M/24A1
R901382338 4WRPEH6C4B02L-3X/M/24F1
R901382525 4WRPEH6C4B02L-3X/V/24F1
R901382317 4WRPEH6C4B04L-3X/M/24A1
R901382327 4WRPEH6C4B04L-3X/M/24F1
R901382528 4WRPEH6C4B04L-3X/V/24F1
R901382533 4WRPEH6C4B04P-3X/M/24A1
R901382318 4WRPEH6C4B12L-3X/M/24A1
R901412522 4WRPEH6C4B12L-3X/M/24A1-561
R901382331 4WRPEH6C4B12L-3X/M/24F1
R901431666 4WRPEH6C4B12L-3X/V/24A1
R901382359 4WRPEH6C4B15P-3X/M/24A1
R901382521 4WRPEH6C4B15P-3X/M/24F1
R901382346 4WRPEH6C4B24L-3X/M/24A1
R901382332 4WRPEH6C4B24L-3X/M/24F1
R901382523 4WRPEH6C4B24L-3X/V/24F1
R901382361 4WRPEH6C4B25P-3X/M/24A1
R901382532 4WRPEH6C4B25P-3X/M/24F1
R901382319 4WRPEH6C4B40L-3X/M/24A1
R901382333 4WRPEH6C4B40L-3X/M/24F1
R901382493 4WRPEH6C4B40L-3X/V/24A1
R901382509 4WRPEH6C4B40L-3X/V/24F1
R901382363 4WRPEH6C4B40P-3X/M/24A1
R901382512 4WRPEH6C4B40P-3X/M/24F1
R901382515 4WRPEH6C5B04L-3X/M/24F1
R901382524 4WRPEH6C5B04L-3X/M/24A1
R901382519 4WRPEH6C5B12L-3X/M/24A1
R901382517 4WRPEH6C5B12L-3X/M/24F1
R901382370 4WRPEH6C5B24L-3X/M/24A1
R901382510 4WRPEH6C5B24L-3X/M/24F1
R901408241 4WRPEH6C5B24L-3X/V/24A1
R901382368 4WRPEH6C5B40L-3X/M/24A1
R901382369 4WRPEH6C5B40L-3X/M/24F1
R901382534 4WRPEH6C5B40L-3X/V/24F1
R901382364 4WRPEH6C5B40P-3X/M/24A1
R901382520 4WRPEH6CB02L-30/M/24A1
R901382376 4WRPEH6CB02L-30/M/24F1
R901382365 4WRPEH6CB04L-30/M/24A1
R901382374 4WRPEH6CB04L-30/M/24F1
R901382505 4WRPEH6CB04L-30/V/24F1
R901382492 4WRPEH6CB04P-30/M/24A1
R901382334 4WRPEH6CB08P-30/M/24A1
R901382337 4WRPEH6CB12L-30/M/24A1
R901382371 4WRPEH6CB12L-30/M/24F1
R901382530 4WRPEH6CB15P-30/M/24A1
R901429091 4WRPEH6CB15P-30/M/24F1
R901381804 4WRPEH6CB24L-30/M/24A1
R901382372 4WRPEH6CB24L-30/M/24F1
R901382526 4WRPEH6CB24L-30/V/24F1
R901382490 4WRPEH6CB25P-30/M/24A1
R901382353 4WRPEH6CB40L-30/M/24A1
R901382354 4WRPEH6CB40L-30/M/24F1
R901438744 4WRPEH6CB40L-30/V/24A1
R901382630 4WRPEH6CB40P-30/M/24A1
R901382375 4WRPEH6CB40P-30/M/24F1
R901382538 4WRPEH6C1B12L-30/M/24A1
R901436252 4WRPEH6C1B12L-30/M/24F1
R901382527 4WRPEH6C1B24L-30/M/24A1
R901382491 4WRPEH6C1B24L-30/M/24F1
R901423624 4WRPEH6C1B24L-30/V/24A1
R901382325 4WRPEH6C1B40L-30/M/24A1
R901382487 4WRPEH6C1B40L-30/M/24F1
R901382495 4WRPEH6C1B40P-30/M/24A1
R901396969 4WRPEH6C3B04L-30/M/24F1-885
R901376972 4WRPEH6C3B24L-30/V/24F1
R901410492 4WRPEH6C3B40L-30/M/24A1-15
R901382367 4WRPEH6C3B02L-30/M/24A1
R901382336 4WRPEH6C3B02L-30/M/24F1
R901382345 4WRPEH6C3B04L-30/M/24A1
R901382347 4WRPEH6C3B04L-30/M/24F1
R901382488 4WRPEH6C3B04L-30/V/24A1
R901382514 4WRPEH6C3B04L-30/V/24F1
R901382316 4WRPEH6C3B04P-30/M/24A1
R901382502 4WRPEH6C3B04P-30/M/24F1
R901382496 4WRPEH6C3B04P-30/V/24A1
R901382537 4WRPEH6C3B04P-30/V/24F1
R901396859 4WRPEH6C3B08L-30/M/24A1
R901382504 4WRPEH6C3B08L-30/V/24F1
R901382312 4WRPEH6C3B12L-30/M/24A1
R901382348 4WRPEH6C3B12L-30/M/24F1
R901382503 4WRPEH6C3B12L-30/V/24A1
R901382513 4WRPEH6C3B12L-30/V/24F1
R901382323 4WRPEH6C3B15P-30/M/24A1
R901382511 4WRPEH6C3B15P-30/M/24F1
R901382522 4WRPEH6C3B15P-30/V/24A1
R901382313 4WRPEH6C3B24L-30/M/24A1
R901382349 4WRPEH6C3B24L-30/M/24F1
R901372986 4WRPEH6C3B24L-30/V/24A1
R901382357 4WRPEH6C3B25P-30/M/24A1
R901382535 4WRPEH6C3B25P-30/M/24F1
R901382315 4WRPEH6C3B40L-30/M/24A1
R901382350 4WRPEH6C3B40L-30/M/24F1
R901382343 4WRPEH6C3B40L-30/V/24A1
R901382516 4WRPEH6C3B40L-30/V/24F1
R901382358 4WRPEH6C3B40P-30/M/24A1
R901382539 4WRPEH6C3B40P-30/M/24F1
R901382356 4WRPEH6C4B02L-30/M/24A1
R901382338 4WRPEH6C4B02L-30/M/24F1
R901382525 4WRPEH6C4B02L-30/V/24F1
R901382317 4WRPEH6C4B04L-30/M/24A1
R901382327 4WRPEH6C4B04L-30/M/24F1
R901382528 4WRPEH6C4B04L-30/V/24F1
R901382533 4WRPEH6C4B04P-30/M/24A1
R901382318 4WRPEH6C4B12L-30/M/24A1
R901412522 4WRPEH6C4B12L-30/M/24A1-561
R901382331 4WRPEH6C4B12L-30/M/24F1
R901431666 4WRPEH6C4B12L-30/V/24A1
R901382359 4WRPEH6C4B15P-30/M/24A1
R901382521 4WRPEH6C4B15P-30/M/24F1
R901382346 4WRPEH6C4B24L-30/M/24A1
R901382332 4WRPEH6C4B24L-30/M/24F1
R901382523 4WRPEH6C4B24L-30/V/24F1
R901382361 4WRPEH6C4B25P-30/M/24A1
R901382532 4WRPEH6C4B25P-30/M/24F1
R901382319 4WRPEH6C4B40L-30/M/24A1
R901382333 4WRPEH6C4B40L-30/M/24F1
R901382493 4WRPEH6C4B40L-30/V/24A1
R901382509 4WRPEH6C4B40L-30/V/24F1
R901382363 4WRPEH6C4B40P-30/M/24A1
R901382512 4WRPEH6C4B40P-30/M/24F1
R901382515 4WRPEH6C5B04L-30/M/24F1
R901382524 4WRPEH6C5B04L-30/M/24A1
R901382519 4WRPEH6C5B12L-30/M/24A1
R901382517 4WRPEH6C5B12L-30/M/24F1
R901382370 4WRPEH6C5B24L-30/M/24A1
R901382510 4WRPEH6C5B24L-30/M/24F1
R901408241 4WRPEH6C5B24L-30/V/24A1
R901382368 4WRPEH6C5B40L-30/M/24A1
R901382369 4WRPEH6C5B40L-30/M/24F1
R901382534 4WRPEH6C5B40L-30/V/24F1
R901382364 4WRPEH6C5B40P-30/M/24A1
力士樂REXROTH四位四通高頻單向閥門，直接驅動，具有集成電子和電氣位置反饋（OBE）4WRPEH 10
0811404809 4WRPEH10CB100L-2X/G24K0/A1M
R901416810 4WRPEH10CB100L-2X/G24K0/A1V
0811404806 4WRPEH10CB100L-2X/G24K0/F1M
R901233486 4WRPEH10CB100L-2X/G24K0/F1V
R901236409 4WRPEH10CB100P-2X/G24K0/F1M
0811404764 4WRPEH10CB50L-2X/G24K0/A1M
0811404765 4WRPEH10CB50L-2X/G24K0/F1M
R901295068 4WRPEH10CB50L-2X/G24K0/F1V
0811404816 4WRPEH10CB50P-2X/G24K0/F1M
0811404821 4WRPEH10C1B100L-2X/G24K0/A1M
R901279150 4WRPEH10C1B100L-2X/G24K0/A1V
0811404763 4WRPEH10C1B100L-2X/G24K0/F1M
0811404829 4WRPEH10C1B100P-2X/G24K0/A1M
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R901192081 4WRPEH10C3B100L-2X/G24K0/A1M=SA
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0811404813 4WRPEH10C3B100L-2X/G24K0/B5M
0811404817 4WRPEH10C3B100L-2X/G24K0/F1M
R901212890 4WRPEH10C3B100L-2X/G24K0/F1V
0811404823 4WRPEH10C3B100P-2X/G24K0/A1M
R901168836 4WRPEH10C3B100P-2X/G24K0/F1M
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0811404800 4WRPEH10C3B50L-2X/G24K0/A1M
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0811404822 4WRPEH10C3B50P-2X/G24K0/A1M
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0811404825 4WRPEH10C4B100P-2X/G24K0/A1M
R901150034 4WRPEH10C4B100P-2X/G24K0/F1M
0811404802 4WRPEH10C4B50L-2X/G24K0/A1M
0811404812 4WRPEH10C4B50L-2X/G24K0/B5M
0811404760 4WRPEH10C4B50L-2X/G24K0/F1M
R901186254 4WRPEH10C4B50L-2X/G24K0/F1V
0811404824 4WRPEH10C4B50P-2X/G24K0/A1M
0811404559 4WRPEH10C4B50P-2X/G24K0/F1M
0811404759 4WRPEH10C5B100L-2X/G24K0/F1M
0811404827 4WRPEH10C5B100P-2X/G24K0/A1M
R901406210 4WRPEH10C5B100P-2X/G24K0/F1M
0811404756 4WRPEH10C5B50L-2X/G24K0/A1M
0811404758 4WRPEH10C5B50L-2X/G24K0/F1M
0811404826 4WRPEH10C5B50P-2X/G24K0/A1M
0811404757 4WRPEH10C5B100L-2X/G24K0/A1M
R901422438 4WRPEH10C5B100L-2X/G24K0/A1V-36
力士樂REXROTH高響應的換向閥，直接操作，集成的數字軸控制器（IAC多以太網）4WRPDH
R901415733 4WRPDH10C1B100L-2X/M/24ND6T
R901372234 4WRPDH10C3B100L-2X/M/24SD6T
R901372818 4WRPDH10C3B100L-2X/M/24TD6T
R901319678 4WRPDH10C3B100P-2X/M/24TD6T
R901339086 4WRPDH10C4B100L-2X/M/24ED6T
R901395440 4WRPDH10C4B100L-2X/M/24TD6T
R901428266 4WRPDH10C5B100L-2X/M/24ND6T
R901426772 4WRPDH10C5B50L-2X/M/24ND6T
R901428555 4WRPDH6CB02L-2X/M/24ND6T
R901375537 4WRPDH6CB40P-2X/M/24ND6T
R901416340 4WRPDH6C1B40L-2X/M/24ED6T
R901368366 4WRPDH6C3B04L-2X/M/24SD6T
R901430058 4WRPDH6C3B12L-2X/M/24ND6T
R901372111 4WRPDH6C3B12L-2X/M/24SD6T
R901372816 4WRPDH6C3B12L-2X/M/24TD6T
R901329736 4WRPDH6C3B15P-2X/M/24SD6S
R901157482 4WRPDH6C3B15P-2X/M/24SD6U
R901327738 4WRPDH6C3B15P-2X/M/24SD6U-995
R901368365 4WRPDH6C3B24L-2X/M/24SD6U
R901438459 4WRPDH6C3B40L-2X/M/24ED6T
R901405787 4WRPDH6C3B40L-2X/M/24ND6T
R901368364 4WRPDH6C3B40L-2X/M/24SD6U
R901435066 4WRPDH6C3B40L-2X/M/24SD6U-995
R901384132 4WRPDH6C3B40L-2X/M/24TD6T
R901156750 4WRPDH6C3B40P-2X/M/24ND6T
R901157481 4WRPDH6C3B40P-2X/M/24SD6U
R901320208 4WRPDH6C3B40P-2X/M/24SD6U-995
R901408363 4WRPDH6C4B04L-2X/M/24ND6T
R901408691 4WRPDH6C4B12L-2X/M/24SD6S
R901408693 4WRPDH6C4B12L-2X/M/24SD6T
R901353429 4WRPDH6C4B12L-2X/M/24SD6U
R901407421 4WRPDH6C4B15P-2X/M/24ED6T
R901358982 4WRPDH6C4B15P-2X/M/24SD6U
R901376440 4WRPDH6C4B25P-2X/M/24ED6T
R901420336 4WRPDH6C4B25P-2X/M/24SD6U-83
R901362870 4WRPDH6C4B40L-2X/M/24ND6T
R901395434 4WRPDH6C4B40L-2X/M/24TD6T
R901436807 4WRPDH6C4B40L-2X/V/24ED6T
R901401587 4WRPDH6C4B40P-2X/M/24ND6T
R901410170 4WRPDH6C5B04L-2X/M/24ND6T
R901405782 4WRPDH6C5B40P-2X/M/24ND6U
力士樂REXROTH帶集成的數字軸控制器的高響應閥（iac-r）和現場總線接口4WRPNH../24C/P
0811403362 4WRPNH10CB100L-2X/M/24PF6G
R901280661 4WRPNH10C1B100L-2X/M/24CA6B
R901347466 4WRPNH10C1B100L-2X/M/24PA6A
R901228303 4WRPNH10C1B100L-2X/M/24PA6B
R901224752 4WRPNH10C1B100L-2X/M/24PF6G
R901224856 4WRPNH10C1B100P-2X/M/24PF6G
比例控制閥
采用比例電磁鐵(或力矩馬達)將輸入信號轉換成力或閥的機械位移，使閥的輸出(壓力、流量)也按照其輸入量連續、成比例地進行控制的閥。
大型鋼廠現場使用的比例閥主要有下表中的幾種:伺服比例控制閥、比例控制閥、電液比例控制閥，比例閥，伺服閥。
1、4WRD E..型比例伺服控制閥(高頻響閥)
結構和功能
4WRDE型閥是三級高頻響方向閥。該閥可用于開環控制或閉環調節液流的大小和方向，但主要用于閉環調節回路中。
閥主要由下列部分組成:
1.二級先導控制閥由力矩馬達( 1 )和由噴嘴擋板閥構成的液壓放大器( 5),和用作流量放大級的閥芯襯套組件(6 )(用以控制第三級(7 ))組成。
2.第三級(7)用于流量控制。
3.感應式位移傳感器( 8),連接第三級主閥芯( 10)的磁芯(9 )
通過內置電子放大器實現閥閉環控制信號邏輯連接,位置檢測系統反饋,和先導閥的控制。
給定值/實際值比較得到的差動電壓經過電子控制器放大, 并作為控制偏差量傳遞到閥的一級。這個信號推動兩個控制噴嘴( 3.1, 3.2) 之間的擋板( 2)因而在兩個控制腔(11.1.11.2)產生了壓差。控制閥芯(4 )因此被推動,并通過相應的液流流到彈簧腔(12.1or12.2)閥芯(10)和帶磁芯(9)的位移傳感器(8)-直運動,直到實際值和給定值信號再一次相等。在控制條件下;主閥芯( 10 )一直被保持在給定值所對應的位置。
閥芯行程和給定值成正比。通過閥芯( 10 )相對于控制邊( 13 )的位置,形成相應的與流量成正比的閥口開度。
閥的動態特性通過電子放大器優化。電子放大器內置于閥上(振蕩器,解調器)
零點調節由廠家預先設定,通過閉環控制電子放大器內的電位器, 零點能在名義行程士10%范圍內調整。移去閥蓋尾部的插頭,可以對內置閉環電子放大器進行操作。

2、4WREE..型比例控制閥
1.結構和功能原理
該二位四通和三位四通比例方 向閥為直控,板式結構;由比例電磁操作,比例電磁.帶中心螺紋,圈可單獨拆卸,電磁的控制可通過外部放大器( WRA型)或內置的放大器(WRAE型)實現。
結構:
該閥由下列部分組成:
帶安裝底面的閥體( 1 )
帶彈簧(3和4)的控制閥芯(2 )
帶中心螺紋的電磁鐵( 5和6 )
位移傳感器(7 )
可選帶內置放大器( 8 )
機械零位調整(9 ),
工作原理:
電磁鐵(5和6 )不帶電時,對中彈簧(3和4 )將控制閥芯(2 )保持在中位
比例電磁鐵得電被激勵后,會直接推動控制閥芯( 2),例如:控制電磁"b" (6 )被激勵，控制閥芯(2)被推向左側,位移與輸入電信號成比例,這時,P口至A口及B口至T口通過閥芯與閥體形成的節流溝通并具有漸進的流量特性。電磁鐵( 6 )失電控制.閥芯(2)被對中彈簧(3)重新推回中位。
在電磁鐵失電的情況下,閥芯( 2 )在電磁跌復位彈簧的作用保持在機械中位。這對機能符號”V”的閥芯來說,與液壓中位無關!當閥用于閉環控制而關閉時,閥芯則置于液壓中位。
必須避免回油管路中的油全部排空, 必要時在回路中安裝背壓閥(背壓約2 bar)。

3、4WR...型比例控制閥
3.結構和功能原理
先導控制閥型號3DREP 6... 該先導閥是一個由比例電磁鐵控制的三通減壓閥,它的作用是將一個輸入的電信號轉化為一個與其成比例的壓力輸出信號,可用于所有的4WRZ..和5WR...型比例閥的控制。
比例電磁鐵是可調式,濕式直流電磁結構,帶中心螺紋,線圈可單獨拆卸;電磁鐵控制可通過外部放大器( WRZ型)或內置的放大器( WRZE型)來實現。
結構:
該閥主要由下列部分組成:
(1)帶有安裝底面的殼體( 1 );
(2)裝有壓力測量活塞(3和4)的控制閥芯(2 );
(3)帶中心螺紋電磁鐵( 5和6);
(4)可選帶內置放大器( 7 )
工作原理:
(1)當電磁鐵(5和6)不帶電時,對中彈簧將控制閥芯(2)保持在中位;
(2)比例電磁鐵帶電被激勵后, 會直接推動控制閥芯( 2),例如:電磁”a” (5)被激勵;
(3)控制閥芯(2)和壓力測量活塞(3)被推向左側;
(4)位移與輸入的電信號成比例。
這時,P口與B口及A口與T口通過閥芯與閥體形成的節流口1接通，節流特性為漸進式。如果電磁鐵(5 )失電,控制閥芯( 2 )被彈簧重新推回中位。在先導閥的中位，A口、B口和T口相通,這也意味著油液可以從這里直接回油箱。

先導式比例方向閥, 型號4WRZ..和5WRZ.. , 4WRZ..型閥是先導式、比例電磁鐵
控制的四通方向閥,它可控制液流的方向和大小。
結構:
該閥主要由下列部分組成:
(1)裝有比例電磁. (5和6 )的先導控制閥( 9 )
(2)裝有主閥芯(11)和對中彈簧(12)的主閥(10)
工作原理:
(1)當電磁鐵(5和6)不帶電時,對中彈簧(12)將主閥芯(11)保持在中位。
(2)主閥芯(11)的動作由先導閥(9)來控制-它會間接地被電磁鐵”b"(6)成比例地推動。首先控制閥芯( 2 )被推向右側,控制油經過先導閥(9 )進入控制腔( 13 )，并與輸入信號成比例地推動主閥芯( 11 ), 這時,P口與A口及B口與T口通過閥芯與閥體形成的節流口接通,節流特性為漸進式。
(3)先導閥所需的控制油液可通過P口內供或X口外供。
(4)如果電磁鐵(6)失電,控制閥芯( 2 )和主閥芯( 11 )會重新回到中位。
(5)隨著主閥芯位置的不同, P口與A口、B口與T口(R)接通或P口與B口、A口與T口(R)通。可選保護罩手動應急操作( 14和15 ),它可使先導閥芯( 2 )在電磁不通電的情況下移動。