REXROTH液控單向閥SV30PA1-45是上海韋米機(jī)電設(shè)備有限公司主營(yíng)產(chǎn)品之一，銷售熱線： ；聯(lián)系人：雷青；業(yè)務(wù)QQ：---；手機(jī)微信： ； ；傳真 ；原廠直銷，質(zhì)量保障，現(xiàn)貨庫(kù)存，價(jià)格優(yōu)惠！
液控單向閥是依靠控制流體壓力，可以使單向閥反向流通的閥。這種閥在煤礦機(jī)械的液壓支護(hù)設(shè)備中占有較重要的地位。液控單向閥與普通單向閥不同之處是多了一個(gè)控制油路K，當(dāng)控制油路未接通壓力油液時(shí)，液控單向閥就象普通單向閥一樣工作，壓力油只從進(jìn)油口流向出油口，不能反向流動(dòng)。當(dāng)控制油路油控制壓力輸入時(shí)，活塞頂桿在壓力油作用下向右移動(dòng)，用頂桿頂開單向閥，使進(jìn)出油口接通。若出油口大于進(jìn)油口就能使油液反向流動(dòng)。
液控單向閥是方向控制閥中的一種。具體分類：
方向控制閥按其在液壓系統(tǒng)中的功能分為單向閥和換向閥兩大類。
單向閥在液壓傳動(dòng)中有普通單向閥和液控單向閥。
(1)保持壓力。
滑閥式換向閥都有間隙泄漏現(xiàn)象，只能短時(shí)間保壓。當(dāng)有保壓要求時(shí)，可在油路上加一個(gè)液控單向閥，利用錐閥關(guān)閉的嚴(yán)密性，使油路長(zhǎng)時(shí)間保壓。
(2)液壓缸的“支承”。
在立式液壓缸中，由于滑閥和管的泄漏，在活塞和活塞桿的重力下，可能引起活塞和活塞桿下滑。將液控單向閥接于液壓缸下腔的油路，則可防止液壓缸活塞和滑塊等活動(dòng)部分下滑。
(3)實(shí)現(xiàn)液壓缸鎖緊。
當(dāng)換向閥處于中位時(shí)，兩個(gè)液控單向閥關(guān)閉，可嚴(yán)密封閉液壓缸兩腔的油液，這時(shí)活塞就不能因外力作用而產(chǎn)生移動(dòng)。
(4)大流量排油。
液壓缸兩腔的有效工作面積相差很大。在活塞退回時(shí)，液壓缸右腔排油量驟然增大，此時(shí)若采用小流量的滑閥，會(huì)產(chǎn)生節(jié)流作用，限制活塞的后退速度；若加設(shè)液控單向閥，在液壓缸活塞后退時(shí)，控制壓力油將液控單向閥打開，便可以順利地將右腔油液排出。
(5)作充油閥。
立式液壓缸的活塞在高速下降過(guò)程中，因高壓油和自重的作用，致使下降迅速，產(chǎn)生吸空和負(fù)壓，必須增設(shè)補(bǔ)油裝置。液控單向閥作為充油閥使用，以完成補(bǔ)油功能。
(6)組合成換向閥。
在設(shè)計(jì)液壓回路時(shí)，有時(shí)可將液控單向閥組合成換向閥使用。例如：用兩個(gè)液控單向閥和一個(gè)單向閥并聯(lián)（單向閥居中），則相當(dāng)于一個(gè)三位三通換向閥的換向回路。需要指出，控制壓力油油口不工作時(shí)，應(yīng)使其通回油箱，否則控制活塞難以復(fù)位，單向閥反向不能截止液流。
REXROTH液控單向閥SV30PA1-45
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
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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
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R983040186 SV10PB1-4X/IN010
R983040187 SV10PB1-4X/VIN010
R983040188 SV10PB2-4XIN010
R988002174 SV10PA1-4X/
R983040189 SV20GA1-4XIN010
R983040190 SV20GA1-4X/VIN010
R983040191 SV20GA2-4XIN010
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R983040193 SV20PA1-4XIN010
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R983040195 SV20PA2-4XIN010
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R983030714 SV20PB4-4X/VIN010
R988002176 SV20PA1-4X/
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R983049151 SV30PA3-4X/VIN010
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R983040205 SV30PB1-4X/VIN010
R983040206 SV30PB2-4XIN010
R983040207 SV30PB3-4X/IN010
R988002178 SV30PA1-4X/
R983064829 SV30GB3-4X/IN010
力士樂(lè)REXROTH液控單向閥SL 6
R901232640 SL6PA1-6X/
R900565317 SL6PA1-6X/SO310
R901232641 SL6PA1-6X/V
R901427400 SL6PA1-6X/VJ3
R901439613 SL6PA2-6X/
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R901432052 SL6PA2-6X/VJ3
R901387396 SL6PA3-6X/
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R900491117 SL6PB1-6X/
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R901361958 SL6PB1-6X=
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R900590651 SL6PB3-6X/
R900567192 SL6PB3-6X/V
R900597726 SL6PB4-6X/
R901080403 SL6PB4-6X/JV
R900934694 SL6PB4-6X/V
力士樂(lè)REXROTH液控單向閥SL 10...32
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R900448378S L10GA1-4X//12
R900429093S L10GA1-4X//5
R900457618S L10GA1-4X/J
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R900451135S L10GB1-4X/
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R900580052S L10GB1-4X/V
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R900447726S L10GB3-4X/
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R901426808S L10GB3-4X/QMG24
R900522041S L10GB3-4X/V
R900536395S L10GB4-4X/
R900550802S L10GB4-4X/V/12
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R901121247S L10PB3-4X/V
R901430220S L10PB3-4X/VJ3
R901301264S L10PB3-4X/VJ50
R900451335S L10PB4-4X/
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R983040138S L10GA1-4XIN010
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R983040141S L10GB1-4XIN010
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R983040147S L10PA2-4XIN010
R983040148S L10PA2-4X/VIN010
R983040149S L10PA3-4XIN010
R983040150S L10PA4-4XIN010
R983040151S L10PB1-4XIN010
R983040152S L10PB1-4X/VIN010
R983040153S L10PB2-4XIN010
R983040154S L10PB3-4XIN010
R983030717S L10PB4-4X/IN010
R983030717S L10PB4-4X/IN010
R978014265S L10GA2-4X/V/12
R978878966S L10GB2-4X/12
REXROTH液控單向閥SV30PA1-45
方向控制按用途分為單向閥和換向閥。單向閥：只允許流體在管道中單向接通，反向即切斷。換向閥：改變不同管路間的通、斷關(guān)系。根據(jù)閥芯在閥體中的工作位置數(shù)分兩位、三位等；根據(jù)所控制的通道數(shù)分兩通、三通、四通、五通等；根據(jù)閥芯驅(qū)動(dòng)方式分手動(dòng)，機(jī)動(dòng)，電動(dòng)，液動(dòng)等。圖2為三位四通換向閥的工作原理。P 為供油口，O 為回油口，A 、B 是通向執(zhí)行元件的輸出口。當(dāng)閥芯處?kù)吨形粫r(shí)，全部油口切斷，執(zhí)行元件不動(dòng)；當(dāng)閥芯移到右位時(shí)，P 與A 通，B 與O 通；當(dāng)閥芯移到左位時(shí)，P 與B 通，A 與O 通。這樣，執(zhí)行元件就能作正、反向運(yùn)動(dòng)。
REXROTH液控單向閥SV30PA1-45
力士樂(lè)REXROTH液控單向閥SV 6
R901320289 SV6PA1-6X/
R901429568 SV6PA1-6X/V
R901407741 SV6PA2-6X/
R901394118 SV6PA3-6X/J50
R900494086 SV6PB1-6X/
R900516740 SV6PB1-6X/J
R900593008 SV6PB1-6X/V
R900411995 SV6PB1-6X/W64
R900589253 SV6PB2-6X/
R901353602 SV6PB2-6X/J50
R900516497 SV6PB2-6X/V
R900598166 SV6PB3-6X/
R900597481 SV6PB3-6X/V
R900586840 SV6PB4-6X/
R900247185 SV6PB4-6X/V
力士樂(lè)液控單向閥SV 10...32
R900483368 SV10GA1-4X/
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
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R983070087 SV10GB2-4X/IN010
R900453511 SV10GB1-4X/
R900426646 SV10GB1-4X//12
R900522959 SV10GB1-4X/J
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REXROTH液控單向閥SV30PA1-45
