力士樂比例溢流閥是一種能夠使所輸出油液的參數(shù)（壓力）隨輸入電信參數(shù)（電流或電壓）的變化而成比例地變化的液壓控制閥。通過電磁鐵電壓的變化產(chǎn)生不同大小的推力作用在閥芯上，從而得到連續(xù)變化的液壓壓力。

    力士樂DBE(M)型比例溢流閥又比例先導閥，安全閥和插裝式主閥組成。比例先導閥控制主閥遙控口。力士樂DBE型比例溢流閥按輸入電流大小成比例地控制液壓系統(tǒng)的壓力，閥的通油能力大，適用于流量較大的液壓系統(tǒng)

    力士樂DBE型比例溢流閥的系統(tǒng)壓力限由比例電磁鐵2設(shè)定，與電流有關(guān)，來自系統(tǒng)的壓力作用于主閥芯4，與此同時，經(jīng)過裝有節(jié)流孔5的先導管作用于主閥芯4的彈簧加載側(cè)并作用在先導閥芯6.如果系統(tǒng)壓力升高得超過對應著電磁鐵力的設(shè)定值，則先導閥芯6打開。
    現(xiàn)在先導油可以流回油箱，節(jié)流孔組產(chǎn)生作用在主閥芯4上的壓降，使它從閥座上升起并打開從泵到油箱的通路。
    力士樂DBEM行比例溢流閥為了保護系統(tǒng)免遭比例電磁鐵2不能允許的高電流尖峰引起的不能允許的高壓之害，有一種供選方案是裝設(shè)一個彈簧加載的壓力溢流閥7zui高保護。

    力士樂DBE(M)型比例溢流閥由直流比例電磁鐵和先導型溢流閥組成。工作原理是：當輸入一個電信時，比例電磁鐵1便產(chǎn)生一個相應的電磁力，它通過推桿2和彈簧3的作用，使錐閥4接觸在閥座5上，因此打開的液壓力與電流成正比，形成一個比例先導壓力閥。孔a為主閥閥芯6的阻尼孔，由先導式溢流閥工作原理，對溢流閥閥芯6上的受力分析可知，電液比例溢流閥壓力的高低與輸人信電流的大小成正比，即油壓受輸入電磁鐵的電流大小控制。若輸入信電流是連續(xù)地按比例地或按一定程序變化，則比例溢流閥所調(diào)節(jié)的液壓系統(tǒng)壓力，也連續(xù)地按比例地或按一定程序地進行變化。從而將手調(diào)溢流閥，改為電信控制。

　　力士樂DBE(M)型比例溢流閥實現(xiàn)多級壓力控制，當以不同電流J1、j2、J3、J4和J5輸入時，溢流閥就可得到五種壓力控制，它與普通溢流閥的多級壓力控制相比，液壓元件數(shù)量少，系統(tǒng)簡單。若輸入的是連續(xù)變化的信則可實現(xiàn)連續(xù)的壓力控制。先導型比例溢流閥。它的先導部分是直動式比例壓力閥，可作為直動式比例溢流閥使用。若與普通壓力閥組合，可組成先導型比例溢流閥、比例減壓閥和比例順序閥等元件。

Rexroth力士樂DBE(M)型比例溢流閥的*型：
R900917730  DBE 10-3X/50YG24K4-115     R900916121  DBE 10-5X/100YG24K4M
R900916122  DBE 10-5X/100YG24K4M-1     R900579169  DBE 10-5X/200YG24K4M
R901069892  DBE 10-5X/315XYG24K4M      R900916124  DBE 10-5X/315YG24K4M
R900916123  DBE 10-5X/315YG24NK4M-1    R900967563  DBE 10-5X/350YG24K4M
R900916125  DBE 10-5X/50XYG24K4M       0811402109  DBE 10X-1X/180G24-8NZ4M
0811402110  DBE 10X-1X/315G24-8NZ4M    0811402108  DBE 10X-1X/80G24-8NZ4M
0811402117  DBE 10Z-1X/180XYG24-8NZ4M  0811402118  DBE 10Z-1X/315XYG24-8NZ4M
R900917731  DBE 20-3X/50YG24K4-115     R900916242  DBE 20-5X/100YG24NK4M
R900975472  DBE 20-5X/315YG24K4M       R900940821  DBE 20-5X/350YG24K4M
R900916131  DBE 30-3X/100YG24K4M       R900916132  DBE 30-3X/200YG24K4M
R900916133  DBE 30-3X/315YG24K4M       0811402041  DBE 6X-1X/180G24-25NZ4M
0811402044  DBE 6X-1X/180G24-8NZ4M     0811402042  DBE 6X-1X/315G24-25NZ4M
0811402043  DBE 6X-1X/315G24-8NZ4M     0811402040  DBE 6X-1X/80G24-25NZ4M
0811402045  DBE 6X-1X/80G24-8NZ4M      R900924428  DBE6-1X/100G24NK4M
R900916244  DBE6-1X/100YG24NK4M        R900916047  DBE6-1X/200G24K4M
R900916048  DBE6-1X/200G24NK4M         R900936001  DBE6-1X/200YG24NK4M
R900551840  DBE6-1X/315G24K4M          R900573294  DBE6-1X/315G24NK4M
R900943833  DBE6-1X/315YG24K4M         R900916045  DBE6-1X/315YG24NK4M
R900945295  DBE6-1X/350G24NK4M         R900916046  DBE6-1X/50G24NK4M
R900946371  DBE6-1X/50YG24NK4M         0811402100  DBEB 10Z-1X/180XYG24-37Z4M
0811402101  DBEB 10Z-1X/315XYG24-37Z4M 0811402095  DBEB 6X-1X/180G24-25Z4M
0811402115  DBEBE 10Z-1X/180XYG24K31A1M  0811402116  DBEBE 10Z-1X/315XYG24K31A1M
0811402077  DBEBE 6X-1X/180G24K31A1M   0811402079  DBEBE 6X-1X/180G24K31F1M
0811402076  DBEBE 6X-1X/315G24K31A1M   0811402078  DBEBE 6X-1X/80G24K31A1M
R900963245  DBEC 30-3X/315YG24K4       R900931821  DBEE 10-5X/200YG24K31M
R900535115  DBEE 10-5X/315YG24K31M     R900974904  DBEE 10-5X/50YG24NK31M
R900731840  DBEE 20-5X/100YG24K31M     R901163997  DBEE 20-5X/200YG24K31V
R900948803  DBEE 6-1X/100G24K31M       R900919359  DBEE 6-1X/100YG24K31M
R900727718  DBEE 6-1X/100YG24NK31M     R900952490  DBEE 6-1X/200G24K31M
R900728050  DBEE 6-1X/200G24K31V       R900954433  DBEE 6-1X/200YG24K31M
R900546986  DBEE 6-1X/315G24K31M       R900940727  DBEE 6-1X/315G24K31V
R900962239  DBEE 6-1X/315G24NK31M      R900546987  DBEE 6-1X/315YG24K31M
R900743106  DBEE 6-1X/315YG24K31V      R900706135  DBEE 6-1X/350YG24K31M
R900972193  DBEE 6-1X/50G24K31M        R900940726  DBEE 6-1X/50G24K31V

力士樂DBE(M)型比例溢流閥
R900954432  DBEE 6-1X/50YG24K31M       R900943143  DBEM 10-5X/100YG24K4M
R900965816  DBEM 10-5X/200XYG24K4M     R900941300  DBEM 10-5X/200XYG24K4M-1
R900923238  DBEM 10-5X/200YG24K4M      R900946965  DBEM 10-5X/200YG24K4M-1
R900579448  DBEM 10-5X/200YG24NK4M     R900916245  DBEM 10-5X/200YG24NK4M-1
R900574165  DBEM 10-5X/315XYG24K4M-1   R900547401  DBEM 10-5X/315YG24K4M
R900923190  DBEM 10-5X/315YG24K4M-1    R900705663  DBEM 10-5X/315YG24K4V
R900904645  DBEM 10-5X/350YG24K4M      R900928037  DBEM 10-5X/50YG24K4M
R900916127  DBEM 20-5X/100YG24K4M      R900916128  DBEM 20-5X/100YG24K4M-1
R900941302  DBEM 20-5X/200XYG24K4M-1   R900923239  DBEM 20-5X/200YG24K4M
R900579947  DBEM 20-5X/200YG24K4M-1    R900941260  DBEM 20-5X/200YG24K4V-1
R900916129  DBEM 20-5X/200YG24NK4M     R900727879  DBEM 20-5X/315XYG24K4M
R900962811  DBEM 20-5X/315XYG24K4M-1   R900923241  DBEM 20-5X/315YG24K4M
R900916130  DBEM 20-5X/315YG24K4M-1    R900578827  DBEM 20-5X/350YG24K4M
R900709844  DBEM 20-5X/350YG24K4V      R901114837  DBEM 20-5X/50YG24K4M
R900922698  DBEM 20-5X/50YG24NK4M      R901055517  DBEM 30 G-3X/420YG24K4V-683
R900916134  DBEM 30-3X/100YG24K4M      R900916135  DBEM 30-3X/200XYG24K4M
R900921597  DBEM 30-3X/200YG24K4M      R900552114  DBEM 30-3X/315YG24K4M
R900245866  DBEM 30-3X/350XYG24K4M     R900719426  DBEM 30-3X/50YG24K4M
R900954707  DBEME 10-5X/100YG24K31M    R900924513  DBEME 10-5X/100YG24NK31M
R900954708  DBEME 10-5X/200YG24K31M    R900551073  DBEME 10-5X/200YG24NK31M
R900958678  DBEME 10-5X/315XYG24K31M   R900536812  DBEME 10-5X/315YG24K31M 
R900941261  DBEME 10-5X/350YG24K31M    R900908585  DBEME 10-5X/50YG24K31M
R900717759  DBEME 20-5X/100XYG24K31M   R900937307  DBEME 20-5X/100YG24K31M
R900954709  DBEME 20-5X/200YG24K31M    R900901375  DBEME 20-5X/315XYG24K31M
R900536813  DBEME 20-5X/315YG24K31M    R900954711  DBEME 20-5X/50YG24K31M
R900954710  DBEME 20-5X/350YG24K31M    R900937596  DBEME 20-5X/350YG24K31V
R900954713  DBEME 30-3X/100YG24K31M    R900954714  DBEME 30-3X/200YG24K31M
R900954715  DBEME 30-3X/315YG24K31M    R900954716  DBEME 30-3X/350YG24K31M
R900954717  DBEME 30-3X/50YG24K31M

  力士樂DBE(M)型比例溢流閥