力士樂DBE（M）型比例溢流閥又比例先導(dǎo)閥，安全閥和插裝式主閥組成。比例先導(dǎo)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)壓力極限由比例電磁鐵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(dǎo)管作用于主閥芯4的彈簧加載側(cè)并作用在先導(dǎo)閥芯6.如果系統(tǒng)壓力升高得超過對應(yīng)著電磁鐵力的設(shè)定值，則先導(dǎo)閥芯6打開。
現(xiàn)在先導(dǎo)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處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7提供zui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(dǎo)型溢流閥組成。工作原理是：當(dāng)輸入一個電信號時，比例電磁鐵1便產(chǎn)生一個相應(yīng)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(dǎo)壓力閥。孔a為主閥閥芯6的阻尼孔，由先導(dǎo)式溢流閥工作原理，對溢流閥閥芯6上的受力分析可知，電液比例溢流閥進口壓力的高低與輸人信號電流的大小成正比，即進口油壓受輸入電磁鐵的電流大小控制。若輸入信號電流是連續(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，改為電信號控制。 力士樂DBE(M)型比例溢流閥實現(xiàn)多級壓力控制，當(dāng)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)變化的信號則可實現(xiàn)連續(xù)的壓力控制。 先導(dǎo)型比例溢流閥。它的先導(dǎo)部分是直動式比例壓力閥，可直接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(dǎo)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*型號：
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 811402100 DBEB 10Z-1X/180XYG24-37Z4M 力士樂DBE（M）型比例溢流閥 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
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）隨輸入電信號參數(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。
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