上海韦米机电设备有限公司

SL20PA1-4X进口力士乐液控单向阀 德国****博世力士乐REXROTH液压阀 液控单向阀

库存现货力士乐液压元件: 柱塞泵A10VSO、电磁阀4WE、电磁阀3WE、溢流阀DBW、DBDS、DB、3DR、节流阀Z2S、Z2F、叶片泵PV7、PVV、齿轮泵PH2,PH4,PGF、HM20/HM17压力传感器、压力继电器HED、博世放大器、放大板 、阀0811、0820 、齿轮泵0510、减压阀DR、ZDR、4WREE,马达伺服驱动 电机等系列产品

SL20PA1-4X进口力士乐液控单向阀

液控单向阀是方向控制阀中的一种。具体分类：

方向控制阀按其在液压系统中的功能分为单向阀和换向阀两大类。

单向阀在液压传动中有普通单向阀和液控单向阀。

单向阀主要特点

(1)保持压力。

滑阀式换向阀都有间隙泄漏现象，只能短时间保压。当有保压要求时，可在油路上加一个液控单向阀，利用锥阀关闭的严密性，使油路长时间保压。

(2)液压缸的“支承”。

在立式液压缸中，由于滑阀和管的泄漏，在活塞和活塞杆的重力下，可能引起活塞和活塞杆下滑。将液控单向阀接于液压缸下腔的油路，则可防止液压缸活塞和滑块等活动部分下滑。

(3)实现液压缸锁紧。

当换向阀处于中位时，两个液控单向阀关闭，可严密封闭液压缸两腔的油液，这时活塞就不能因外力作用而产生移动。

(4)大流量排油。

液压缸两腔的有效工作面积相差很大。在活塞退回时，液压缸右腔排油量骤然加大，此时若采用小流量的滑阀，会产生节流作用，限制活塞的后退速度；若加设液控单向阀，在液压缸活塞后退时，控制压力油将液控单向阀打开，便可以顺利地将右腔油液排出。

(5)作充油阀。

立式液压缸的活塞在高速下降过程中，因高压油和自重的作用，致使下降迅速，产生吸空和负压，必须增设补油装置。液控单向阀作为充油阀使用，以完成补油功能。

(6)组合成换向阀。

在设计液压回路时，有时可将液控单向阀组合成换向阀使用。例如：用两个液控单向阀和一个单向阀并联（单向阀居中），则相当于一个三位三通换向阀的换向回路。需要指出，控制压力油油口不工作时，应使其通回油箱，否则控制活塞难以复位，单向阀反向不能截止液流。

注意事项。

(1)必须保证液控单向阀有足够的控制压力，较好不允许控制压力失压。应注意控制压力是否满足反向开启的要求。如果液控单向阀的控制引自主系统时，则要分析主系统压力的变化对控制油路压力的影响，以免出现液控单向阀的误动作。

(2)根据液控单向阀在液压系统中的位置或反向出油腔后的液流阻力（背压）大小，合理选择液控单向阀的结构（简式或复式）及泄油方式（内泄或外泄）。对于内泄式液控单向阀来说，当反向油出口压力超过一定值时，液控部分将失去控制作用，故内泄式液控单向阀一般用于反向出油腔无背压或背压较小的场合；而外泄式液控单向阀可用于反向出油腔背压较高的场合，以降低较小的控制压力，节省控制功率。系统若采用内卸式，则柱塞缸将断续下降发出振动和噪声。

SL20PA1-4X进口力士乐液控单向阀

SV和SL型液控单向阀都是座式阀，由液压开启，能给出反向流。

这种阀用来隔离局部压力回路，即作为在管子破裂时防止负载降落的保护，也可防止负载下爬。这种液控单向阀主要包括阀体、主阀、先导阀、压缩弹簧和控制活塞 。

SV型阀(无泄油口)一一泄漏油内部回油

由A口至B口始终可以流动。反方向上则导阀和主阀被压缩弹簧和系统压力保持在阀座上。若X口供给压力油则控制活塞被推向右。

这先打开导阀，然后打开主阀。于是油液先通过导阀，然后通过主

导阀。为了保证用控制活塞能可靠地操纵，需要一定的低控制压力。

SL型阀(带泄油口)-一-泄漏油外部回油

在原理上，此阀与SV型有相同的功能。不同之处在于增加了泄油口Y,这就可使控制活的环形面积与A口隔离。A口来的油压只作用在控制活塞的面积A4上，从而有效地降低此条件下所需的控制压力。

SL20PA1-4X进口力士乐液控单向阀型号

力士乐液控单向阀SV 10...32

R900483368 DGA1-4X/

R900481097 SV10GA1-4X//12

R900426680 SV10GA1-4X//5

R900586980 SV10GA1-4X/J

R901430216 SV10GA1-4X/J3

R900469894 SV10GA1-4X/SO43

R900465776 SV10GA1-4X/V

R900462117 SV10GA1-4X/V/12

R900437841 SV10GA1-4X/V/5

R900072367 SV10GA1-4X==PL

R900455015 SV10GA2-4X/

R900222361 SV10GA2-4X//12

R900481120 SV10GA2-4X/V

R900477368 SV10GA2-4X/V/12

R900402853 SV10GA3-4X/

R900514060 SV10GA3-4X//12

R900519481 SV10GA3-4X/J

R900032320 SV10GA3-4X/V

R900596177 SV10GA4-4X/

R978905884 SV10GA4-4X/12

R900511928 SV10GA4-4X/SO287

R900509845 SV10GA4-4X/V

R983073301 SV10GA4-4X/VIN010

R983070087 SV10GB2-4X/IN010

R900453511 SV10GB1-4X/

R900426646 SV10GB1-4X//12

R900522959 SV10GB1-4X/J

R900440206 SV10GB1-4X/SO267

R900428704 SV10GB1-4X/SO43

R900442169 SV10GB1-4X/V

R978856677 SV10GB1-4X/V/12

R901328265 SV10GB1-4X=

R900464954 SV10GB2-4X/

R978867297 SV10GB2-4X/12

R978867297 SV10GB2-4X/12

R900033054 SV10GB2-4X/B08

R900509453 SV10GB2-4X/V

R900403533 SV10GB3-4X/

R900566670 SV10GB3-4X//12

R901426827 SV10GB3-4X/QMG24

R900455086 SV10GB4-4X/

R978864037 SV10GB4-4X/12

R900509610 SV10GB4-4X/V

R900509604 SV10GB4-4X/VSO266

R900504017 SV10KA1-4X/V

R983030709 SV10PA1-4XIN010

R900483369 SV10PA1-4X/

R900389885 SV10PA1-4X//5

R900082425 SV10PA1-4X//50

R900438933 SV10PA1-4X/J

R901436576 SV10PA1-4X/J3

R900533905 SV10PA1-4X/MK

R900463364 SV10PA1-4X/V

R978875670 SV10PA1-4X/VSO43A-1227

R900020393 SV10PA1-4X/V/12

R901248020 SV10PA1-4X=

R900451042 SV10PA2-4X/

R900591533 SV10PA2-4X/J

R901164422 SV10PA2-4X/J3

R900403578 SV10PA2-4X/V

R983046319 SV10PA2-4X/V

R900459915 SV10PA3-4X/

R900517363 SV10PA3-4X/J

R901440742 SV10PA3-4X/J3

R900466324 SV10PA3-4X/V

R983069998 SV10PA3-4X/VIN010

R900582637 SV10PA4-4X/

R983062599 SV10PA4-4X/IN010

R900058707 SV10PA4-4X/SO287

R901114401 SV10PA4-4X/V

R900467724 SV10PB1-4X/

R900754246 SV10PB1-4X//12

R900506962 SV10PB1-4X/MIL15

R900580732 SV10PB1-4X/SO97

R900423202 SV10PB1-4X/V

R983061438 SV10PB24X/VIN10

R900403672 SV10PB2-4X/

R900049468 SV10PB2-4X//50

R900582578 SV10PB2-4X/V

R900464707 SV10PB3-4X/

R983067837 SV10PB3-4X/IN010

R901426812 SV10PB3-4X/QMG24

R901098930 SV10PB3-4X/V

R901254058 SV10PB3-4X/VSO325

R900505678 SV10PB4-4X/

R900500295 SV10PB4-4X/V

R900587549 SV15GA1-4X/

R900503632 SV15GA1-4X//12

R900533195 SV15GA1-4X/J

R900599609 SV15GA1-4X/SO246

R900228258 SV15GA1-4X/SO67

R900500841 SV15GA1-4X/V

R900532575 SV15GA1-4X/V/12

R900501980 SV15GA2-4X/

R900029494 SV15GA2-4X//12

R900501010 SV15GA2-4X/V

R978865277 SV15GA2-4X/V/12

R900502709 SV15GA3-4X/

R900029335 SV15GA3-4X//12

R900035312 SV15GA3-4X/V

R900203833 SV15GA4-4X/

R901019898 SV15GA4-4X//12

R978914280 SV15GA4-4X/12

R900224092 SV15GA4-4X/V

R900501333 SV15GB1-4X/

R900074608 SV15GB1-4X//12

R901007605 SV15GB1-4X/V

R901013993 SV15GB1-4X/V/12

R900599814 SV15GB2-4X/

R900519888 SV15GB2-4X/J

R900509516 SV15GB2-4X/V

R900520859 SV15GB3-4X/

R900705091 SV15GB3-4X//12

R901050475 SV15GB3-4X/V

R900503588 SV15GB4-4X/

R900220496 SV15GB4-4X//12

R900080297 SV15GB4-4X/V

R900587550 SV20GA1-4X/

R900508425 SV20GA1-4X//12

R900510860 SV20GA1-4X//5

R900500292 SV20GA1-4X/V

R900518477 SV20GA1-4X/V/12

R900072649 SV20GA1-4X=

R900500216 SV20GA2-4X/

R900518319 SV20GA2-4X//12

R900053412 SV20GA2-4X/V

R900599639 SV20GA3-4X/

R900203988 SV20GA3-4X//12

R900511197 SV20GA4-4X/

R900511371 SV20GA4-4X/V

R900598553 SV20GB1-4X/

R900074693 SV20GB1-4X//12

R900528413 SV20GB1-4X/V

R901000277 SV20GB1-4X/V/12

R978872250 SV20GB1-4X/V/12

R983061437 SV20GB24X/VIN10

R900599506 SV20GB2-4X/

R983068720 SV20GB2-4X/IN010

R900059115 SV20GB2-4X/J

R901318587 SV20GB2-4X/V

R900502808 SV20GB3-4X/

R900059482 SV20GB3-4X//12

R900020921 SV20GB3-4X/SO295

R900500842 SV20GB4-4X/

R900065256 SV20GB4-4X/V

R900587557 SV20PA1-4X/

R900077864 SV20PA1-4X/J

R901430270 SV20PA1-4X/J3

R978897849 SV20PA1-4X/SO43A-1430

R900500094 SV20PA1-4X/V

R900599535 SV20PA2-4X/

R901170055 SV20PA2-4X/J3

R900566627 SV20PA2-4X/V

R900598342 SV20PA3-4X/

R900502113 SV20PA3-4X/V

R900532463 SV20PA4-4X/

R983061207 SV20PA4-4X/IN010

R900987025 SV20PA4-4X/V

R900501701 SV20PB1-4X/

R900021845 SV20PB1-4X/V

R900501802 SV20PB2-4X/

R900517582 SV20PB2-4X/V

R900501468 SV20PB3-4X/

R983040179 SV20PB3-4X/IN010

R901426816 SV20PB3-4X/QMG24

R900507740 SV20PB4-4X/

R901444120 SV20PB4-4X/V

R900587551 SV25GA1-4X/

R900502332 SV25GA1-4X//12

R900507929 SV25GA1-4X/V

R900561890 SV25GA1-4X/V/12

R901291634 SV25GA1-4X=

R900500951 SV25GA2-4X/

R900505995 SV25GA2-4X/V

R900525172 SV25GA3-4X/

R900514600 SV25GA4-4X/

R978912051 SV25GA4-4X/12

R900516761 SV25GB1-4X/

R978892121 SV25GB1-4X/12

R900507224 SV25GB1-4X/V

R978002992 SV25GB1-4X/V/12

R900522383 SV25GB2-4X/

R900761841 SV25GB2-4X//12

R901059543 SV25GB2-4X/V

R900500483 SV25GB3-4X/

R901272192 SV25GB3-4X/6UVSO311

R901190863 SV25GB3-4X/V

R900587552 SV30GA1-4X/

R900517536 SV30GA1-4X//12

R900031560 SV30GA1-4X//5

R900527645 SV30GA1-4X/V

R900225857 SV30GA1-4X/V/12

R900501151 SV30GA2-4X/

R983059835 SV30GA2-4X/IN010

R900528711 SV30GA2-4X//12

R900520649 SV30GA2-4X/V

R978906849 SV30GA2-4X/V/12

R900500091 SV30GA3-4X/

R900573238 SV30GA4-4X/

R978910038 SV30GA4-4X/V/12

R900599743 SV30GB1-4X/

R983066849 SV30GB1-4X/IN010

R900560697 SV30GB1-4X//12

R901273399 SV30GB1-4X/V

R900504124 SV30GB2-4X/

R978899303 SV30GB2-4X/12

R900224095 SV30GB2-4X/V

R978903236 SV30GB2-4X/V/12

R900571302 SV30GB3-4X/

R900515510 SV30GB4-4X/

R900587558 SV30PA1-4X/

R900987806 SV30PA1-4X/J

R978901569 SV30PA1-4X/SO43A-1477

R900500892 SV30PA1-4X/V

R900599456 SV30PA2-4X/

R900502112 SV30PA2-4X/V

R983054851 SV30PA3-4XIN010

R900599890 SV30PA3-4X/

R901137253 SV30PA3-4X/V

R978917483 SV30PA3-4X/V

R900505554 SV30PA4-4X/

R900525829 SV30PA4-4X/V

R900502240 SV30PB1-4X/

R901135580 SV30PB1-4X/V

R978868962 SV30PB1-4X/V

R900599647 SV30PB2-4X/

R900053091 SV30PB2-4X/V

R900515645 SV30PB3-4X/

R901426830 SV30PB3-4X/QMG24

R900572116 SV30PB3-4X/V

R900513203 SV30PB4-4X/

R983071279 SV30PB4-4X/IN010

R900049469 SV30PB4-4X//50

R900240914 SV30PB4-4X/V

R983040180 SV10GA1-4XIN010

R983030715 SV10GA1-4X/VIN010

R983040181 SV10GA2-4XIN010

R983040182 SV10GB1-4XIN010

R983040183 SV10GB3-4XIN010

R983040184 SV10PA1-4X/VIN010

R983040185 SV10PA2-4XIN010

R983030716 SV10PA3-4XIN010

R983040186 SV10PB1-4X/IN010

R983040187 SV10PB1-4X/VIN010

R983040188 SV10PB2-4XIN010

R988002174 SV10PA1-4X/

R983040189 SV20GA1-4XIN010

R983040190 SV20GA1-4X/VIN010

R983040191 SV20GA2-4XIN010

R983040192 SV20GB1-4X/VIN010

R983040193 SV20PA1-4XIN010

R983040194 SV20PA1-4X/VIN010

R983040195 SV20PA2-4XIN010

R983063146 SV20PA2-4X/VIN010

R983040196 SV20PA3-4XIN010

R983040197 SV20PB1-4XIN010

R983040198 SV20PB1-4X/VIN010

R983040199 SV20PB2-4XIN010

R983030714 SV20PB4-4X/VIN010

R988002176 SV20PA1-4X/

R988002177 SV20PB1-4X/

R983040200 SV30GA1-4XIN010

R983040201 SV30PA1-4XIN010

R983040202 SV30PA1-4X/VIN010

R983040203 SV30PA2-4XIN010

R983049151 SV30PA3-4X/VIN010

R983040204 SV30PB1-4XIN010

R983040205 SV30PB1-4X/VIN010

R983040206 SV30PB2-4XIN010

R983040207 SV30PB3-4X/IN010

R988002178 SV30PA1-4X/

R983064829 SV30GB3-4X/IN010

力士乐REXROTH液控单向阀SL 6

R901232640 SL6PA1-6X/

R900565317 SL6PA1-6X/SO310

R901232641 SL6PA1-6X/V

R901427400 SL6PA1-6X/VJ3

R901439613 SL6PA2-6X/

R901342139 SL6PA2-6X/J50

R901432052 SL6PA2-6X/VJ3

R901387396 SL6PA3-6X/

R901429564 SL6PA3-6X/VJ3

R900491117 SL6PB1-6X/

R900918112 SL6PB1-6X/J

R901256332 SL6PB1-6X/J50

R900928043 SL6PB1-6X/JV

R900594742 SL6PB1-6X/V

R901361958 SL6PB1-6X=

R900590409 SL6PB2-6X/

R900523244 SL6PB2-6X/V

R900590651 SL6PB3-6X/

R900567192 SL6PB3-6X/V

R900597726 SL6PB4-6X/

R901080403 SL6PB4-6X/JV

R900934694 SL6PB4-6X/V

R900483370 SL10GA1-4X/

R900448378 SL10GA1-4X//12

R900429093 SL10GA1-4X//5

R900457618 SL10GA1-4X/J

R900599838 SL10GA1-4X/SO67

R900450160 SL10GA1-4X/V

R983052991 SL10GA1-4X/VIN010

R900062179 SL10GA1-4X/V/12

R900450776 SL10GA2-4X/

R900521462 SL10GA2-4X//12

R900502670 SL10GA2-4X/V

R901363026 SL10GA2-4X=

R900454520 SL10GA3-4X/

R900591065 SL10GA3-4X/V

R900445826 SL10GA4-4X/

R900718605 SL10GA4-4X/V

R983065084 SL10GA4–4X/VIN010

R900451135 SL10GB1-4X/

R900507043 SL10GB1-4X//12

R900220757 SL10GB1-4X//5

R900580052 SL10GB1-4X/V

R900582730 SL10GB1-4X/V/12

R900474395 SL10GB2-4X/

R900511048 SL10GB2-4X/J

R900473900 SL10GB2-4X/V

R900447726 SL10GB3-4X/

R900520846 SL10GB3-4X/J

R901426808 SL10GB3-4X/QMG24

R900522041 SL10GB3-4X/V

R900536395 SL10GB4-4X/

R900550802 SL10GB4-4X/V/12

R900483371 SL10PA1-4X/

R988002099 SL10PA1-4X/

R988004505 SL10PA1-4X/

R900425616 SL10PA1-4X/J

R901430218 SL10PA1-4X/J3

R900207273 SL10PA1-4X/JV

R900537478 SL10PA1-4X/SO96

R900459576 SL10PA1-4X/SO113

R900440205 SL10PA1-4X/SO149

R900508232 SL10PA1-4X/SO251

R900586402 SL10PA1-4X/SO280

R900434337 SL10PA1-4X/SO67

R900079747 SL10PA1-4X/SO97

R900457388 SL10PA1-4X/V

R900425580 SL10PA1-4X/VSO113

R901402148 SL10PA1-4X/VJ50

R901406522 SL10PA1-4X=VJ50

R900442260 SL10PA2-4X/

R901031296 SL10PA2-4X/SO96

R900599830 SL10PA2-4X/SO251

R900586396 SL10PA2-4X/V

R900443418 SL10PA3-4X/

R901341937 SL10PA3-4X/J50

R900504957 SL10PA3-4X/V

R901429658 SL10PA3-4X/VJ3

R900419510 SL10PA4-4X/

R900020963 SL10PA4-4X/J

R901141208 SL10PA4-4X/JV

R900403579 SL10PA4-4X/V

R901430215 SL10PA4-4X/VJ3

R900443419 SL10PB1-4X/

R900058130 SL10PB1-4X/SO313

R900403795 SL10PB1-4X/J

R900532365 SL10PB1-4X/SO257

R900449987 SL10PB1-4X/SO96

R900079790 SL10PB1-4X/SO97

R900481121 SL10PB1-4X/SO97

R900406641 SL10PB1-4X/V

R900457386 SL10PB2-4X/

R900514645 SL10PB2-4X/V

R900438637 SL10PB3-4X/

R901426805 SL10PB3-4X/QMG24

R901426828 SL10PB3-4X/QMG24V

R901121247 SL10PB3-4X/V

R901430220 SL10PB3-4X/VJ3

R901301264 SL10PB3-4X/VJ50

R900451335 SL10PB4-4X/

R900527575 SL10PB4-4X/V

R983040138 SL10GA1-4XIN010

R983040139 SL10GA2-4XIN010

R983040140 SL10GA3-4X/IN010

R983040141 SL10GB1-4XIN010

R983040142 SL10GB24XIN010

R983040143 SL10GB3-4XIN010

R983040144 SL10GB4-4X/IN010

R983040145 SL10PA1-4XIN010

R983040146 SL10PA1-4X/VIN010

R983040147 SL10PA2-4XIN010

R983040148 SL10PA2-4X/VIN010

R983040149 SL10PA3-4XIN010

R983040150 SL10PA4-4XIN010

R983040151 SL10PB1-4XIN010

R983040152 SL10PB1-4X/VIN010

R983040153 SL10PB2-4XIN010

R983040154 SL10PB3-4XIN010

R983030717 SL10PB4-4X/IN010

R983030717 SL10PB4-4X/IN010

R978014265 SL10GA2-4X/V/12

R978878966 SL10GB2-4X/12

减压阀是通过调节，将进口压力减至某一需要的出口压力，并依靠介质本身的能量，使出口压力自动保持稳定的阀门。从流体力学的观点看，减压阀是一个局部阻力可以变化的节流元件，即通过改变节流面积，使流速及流体的动能改变，造成不同的压力损失，从而达到减压的目的。然后依靠控制与调节系统的调节，使阀后压力的波动与弹簧力相平衡，使阀后压力在一定的误差范围内保持恒定。