DB20-1-5X/315供应

DB20-1-5X/315力士乐溢流阀是上海韦米机电设备有限公司的【重点优势产品】之一,联系电话T:021-61116812,手机13524125780(微信)
DB20-1-5X/315力士乐溢流阀德国原装博世力士乐REXROTH溢流阀力士乐比例溢流阀力士乐比例电磁阀

力士乐上海指定销售商：上海韦米机电设备有限公司

特价供应力士乐Rexroth单向阀、Rexroth压力继电器、Rexroth方向阀、Rexroth溢流阀、

Rexroth电磁阀、Rexroth节流阀、液压阀、比例阀、比例液压阀、Rexroth 液压产品 Rexroth 静态配置液压阀、比例液压阀、液压阀、REXROTH液压阀力士乐0811系列、力士乐比例阀，比例流量阀液压阀、叠加式节流阀两路节流单向阀、力士乐压力指示单元、力士乐柱塞泵，叶片泵，外啮合齿轮泵-液压泵等现货低价供应，优势产品型号有4WE 、4WM 、DBD 、DR 、ZDB 、Z2FS 系列阀，A4V、A10VS0、A2FO系列柱塞泵，A2FE、A2FM液压马达，HED系列压力继电器。

电话：021-61116812 13524125780(微信)

传真：021-51334670

在线QQ:1875691081

联系人：何洋(销售)

DB20-1-5X/315力士乐溢流阀

溢流阀是压力控制阀。其作用主要是控制系统压力，以保护油泵和油路系统的安全及保持油路系统的压力恒定。通经为8毫米的溢流阀是一个小型的直接动作的溢流阀，可以和主溢流阀的遥控口连接，对主溢流阀实现远程压力调节。溢流阀的遥控口经换向阀和油箱连接时，可使油路卸荷。此时溢流阀起卸荷作用。溢流阀的遥控口串联换向阀和通经为8毫米的溢流阀时，可实现压力的多级控制。更换溢流阀的调节弹簧，可改变其压力调节范围。手轮顺时针转动时，压力升高。反之压力降低。

DB溢流阀力士乐技术资料

型号 LC..DB 和型号 LFA..DB

2通插装阀，有溢流功能

规格16至100

标准安装按照DIN ISO 7368

可实现卸载、截止和多种压力等级回路

插装件可选择：

座阀活塞

座阀－滑阀活塞

多种控制阀，用于手动和/或电子比例压力调节

在控制盖板中集成

可作为先导控制阀进行安装

多种组合方式

多种开启压力

压力等级范围为25至420bar

多种方式对压力进行手动调节

多种喷嘴配件

密封件可选

在供货范围中的盖板包括安装螺丝

高压型号，可询问本公司

特殊介质（例如乳状液，水），请询问本公司

力士乐溢流阀直动式溢流阀先导式溢流阀常见型号

R900569498 力士乐REXROTH溢流阀DB30-1-5X/100U

R900571796 力士乐REXROTH溢流阀DB30-2-5X/200V

R900587346 力士乐REXROTH溢流阀DB20-1-5X/315

R900587347 力士乐REXROTH溢流阀DB20-2-5X/315X

R900587772 力士乐REXROTH溢流阀DB10-2-5X/200

R900588131 力士乐REXROTH溢流阀DB30-2-5X/200

R900589433 力士乐REXROTH溢流阀DB20-2-5X/100

R900589603 力士乐REXROTH溢流阀DB20-1-5X/100

R900590328 力士乐REXROTH溢流阀DB20G2-5X/50

R900590330 力士乐REXROTH溢流阀DB30-2-5X/100U

R900590334 力士乐REXROTH溢流阀DB10-2-5X/315

R900590618 力士乐REXROTH溢流阀DB20-2-5X/350

R900590645 力士乐REXROTH溢流阀DB10-2-5X/50

R900590646 力士乐REXROTH溢流阀DB10-2-5X/100

R900590768 力士乐REXROTH溢流阀DB20-2-5X/200

R900591126 力士乐REXROTH溢流阀DB10-2-5X/315X

R900591128 力士乐REXROTH溢流阀DB30-2-5X/315

R900591150 力士乐REXROTH溢流阀DB30-2-5X/315X

R900591404 力士乐REXROTH溢流阀DB20-2-5X/315V

R900593404 力士乐REXROTH溢流阀DB10-2-4X/100W65

R900593530 力士乐REXROTH溢流阀DB20-2-5X/315

R900593564 力士乐REXROTH溢流阀DB30-2-5X/50

R900593794 力士乐REXROTH溢流阀DB10-1-5X/350

R900593795 力士乐REXROTH溢流阀DB30-1-5X/315

R900593839 力士乐REXROTH溢流阀DB10-2-5X/100U

R900593840 力士乐REXROTH溢流阀DB10-2-5X/315U

R900594111 力士乐REXROTH溢流阀DB10K1-4X/100YV

R900594511 力士乐REXROTH溢流阀DB20-2-5X/315Y

R900594773 力士乐REXROTH溢流阀DB10-3-5X/200

R900595355 力士乐REXROTH溢流阀DB30-2-5X/315V

R900595739 力士乐REXROTH溢流阀DB10-2-5X/100Y

R900595893 力士乐REXROTH溢流阀DB20-2-5X/200X

R900596259 力士乐REXROTH溢流阀DBC2-5X/315

R900596319 力士乐REXROTH溢流阀DB30-1-5X/100

R900596527 力士乐REXROTH溢流阀DB30-2-5X/200Y

R900596528 力士乐REXROTH溢流阀DB20-2-5X/200Y

R900596563 力士乐REXROTH溢流阀DB10-3-5X/100

R900596738 力士乐REXROTH溢流阀DB10-2-5X/100XY

R900596768 力士乐REXROTH溢流阀DB20-2-5X/315XY

R900596930 力士乐REXROTH溢流阀DB10-2-5X/100X

R900597212 力士乐REXROTH溢流阀DB20-2-5X/50

R900597313 力士乐REXROTH溢流阀DB10-2-5X/315Y

R900597421 力士乐REXROTH溢流阀DB20-2-5X/100Y

R900597664 力士乐REXROTH溢流阀DB10-1-5X/100

R900597665 力士乐REXROTH溢流阀DB10-1-5X/50

R900597992 力士乐REXROTH溢流阀DB10-2-5X/350

R900598998 力士乐REXROTH溢流阀DB10-1-5X/315

R900599380 力士乐REXROTH溢流阀DB10-2-5X/200Y

R900599564 力士乐REXROTH溢流阀DB20-1-5X/315X

溢流阀控制油路的特点通过调整弹簧的压力控制进油路的压力，保证进口压力恒定，p2＝0通过调整弹簧的压力控制出油口的压力，保证出口压力p2稳定直控式－通过调定调压弹簧的压力控制进油路压力；夜控式－由单独油路控制压力出油口情况出油口与油箱相连出油口与减压回路相连出油口与工作回路相连泄漏形式内泄式外泄式外泄式进油口状态及压力值常态常闭（原始状态）常开（原始状态）常闭（原始状态）工作状态进出油口相通，进油口压力为调整压力进油口压力低于出油口压力，出油口压力稳定在调定值上进出油口相通，进油口压力允许继续升高联接方式并联串联实现顺序动作式串联作卸荷阀用时并联功用定压、溢流或安全作用限压、稳压、保压减压、稳压不控制系统的压力，只利用系统的压力变化控制油路的通断进油腔压力p1控制阀芯移动出油腔压力p2控制阀芯移动进油腔压力p1控制阀芯移动

R911280584 MHD093B-035-NG0-BN

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R911281007 MHD071B-061-PP0-UN

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R911281456 MHD093B-058-PG0-LN

R911281505 MHD041B-144-NP1-UN

R911281645 MHD041A-144-NP0-UN

R911281728 MHD071B-061-PP1-UN

R911281819 MHD093C-035-PG1-BN

R911282008 MHD090B-035-PP0-UN

R911282100 MHD090B-047-NG0-UN

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R911282225 MHD093C-035-NG1-AN

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R911283336 MHD093C-058-NG0-LN

R911283439 MHD090B-047-NG1-UN

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R911283824 MHD093C-035-NG1-BN

R911283923 MHD093A-035-NG1-BN

R911283924 MHD093A-058-NG1-BN

R911283965 MHD093C-035-PP0-AN

R911284036 MHD093C-035-PG1-BN/S020

R911284185 MHD071A-061-NG0-UN

R911284769 MHD093C-035-PG0-AN/S020

R911284770 MHD071A-061-NP0-UN

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R911284838 MHD093B-058-NG1-AN

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R911285103 MHD093B-035-NG0-LN

R911285240 MHD093B-035-PP1-AA

R911285294 MHD093B-058-PP0-AA

R911285295 MHD093B-058-PP1-AA

R911285452 MHD090B-047-PP0-UN

R911285554 MHD093B-035-PG0-BA

R911285576 MHD093C-035-PG0-BA

R911285742 MHD093B-058-NG0-BA

R911285881 MHD090B-047-PG1-UN

R911285954 MHD093C-058-PG1-BA

R911286080 MHD090B-047-NP0-UN

R911286081 MHD093A-058-PP0-AA

R911286082 MHD093A-058-PP1-AA

R911286095 MHD093B-035-PG1-AN/S020

R911286104 MHD093B-058-NG1-AA

R911286162 MHD093C-058-PG0-BA

R911286189 MHD093B-058-PG0-BA

R911286223 MHD041A-144-PP0-UN

R911286292 MHD093B-035-NG0-BA

R911286328 MHD093C-035-NG0-AA

R911286330 MHD093C-035-NG1-AA

R911286485 MHD093B-035-NP1-LN

R911286602 MHD093C-035-PG1-BA

R911286676 MHD093C-035-NP0-BA

R911286877 MHD093C-058-NG0-RA

R911286878 MHD093C-058-NG1-AA

R911286976 MHD093B-035-NG0-AA

R911286979 MHD093B-035-NP1-AN

R911287056 MHD093C-035-PG1-AN/S020

R911287096 MHD093B-035-PG0-AA

R911287097 MHD093B-035-PG1-AA

R911287102 MHD071A-061-PP0-UN

R911287126 MHD093B-058-NP0-BA

R911287127 MHD093C-058-NP0-BA

R911287227 MHD093B-035-NP0-AA

R911287228 MHD093B-035-NP1-AA

R911287231 MHD093C-058-PG1-AA

R911287309 MHD093B-035-PG1-BA

R911287321 MHD093B-035-NG1-AA

DB20-1-5X/315力士乐溢流阀先导式比例溢流阀

　　比例溢流阀的压力等级要与系统所需要的压力相适应，以确保较好的分辨率。系统需要调节的最高压力是180bar，则比例溢流阀的压力等级应该是210左右 .不应该是315bar等太高的等级。原则是尽量使比例溢流阀的最高控制压力略大于系统所需要的最高压力。

　　先使系统安全阀全开，比例溢流阀输入电流为零，再起泵。然后保持安全阀为零，给比例阀输入最大电流 .慢慢调节手调安全阀的手柄，使系统压力逐步上升，将比例阀输入电流降下来，直到系统需要的最高压力，记录对应当输入电流数值。这就是系统要求的最高压力说对应的电流，如果用计算机控制或用信号发生器输入，将这个电流最为输入电流的限制值。

博世力士乐rexroth溢流阀力士乐流量阀

R901092803 DBDS20K1X/315-230

R900702785 DBDS20K1X/315P230

R900702542 W-DBDS10K1X=50P35V

R900701673 DBDS15G1X/25P10

R900680727 RING47,8/54,6X2,9E-DBD.30K12/

R900680332 RING33,3/39,6X2,1E-DBD.20K12/

R900633352 KEGEL5,0-5,0X30,5KUGEL6,5DBD6

R900627930 VENTILSITZDBD.10K15/

R900617792 DBDS6K1X/200-110

R900617276 DBDS20K1X/315-315

R900599927 MHDBD10K1-1X/200M-030

R900597412 DBD.10P1X/...V/12

R900596810 DBDS10P1X/315/12

R900595920 DBDA6K1X/25SO49

R900590350 DBDS15G1X/315SO60

R900588364 DBDS6K1X/25SO124

R900588153 DBDS20K1X/25VSO60

R900587084 DBDH25G1X/100V

R900586190 W-DBDS6K1X/315V

R900584384 E-DBDS10P1X/400V

R900582646 MHDBD10K2-1X/250M-017

R900582065 MHDBD10K1-1X/100M-030

R900579992 MHDBDT06G0-2X/280T060M19

R900577005 MHDBD10K2-1X/200-...MFB

R900577004 MHDBDT06G0-2X/210T060M06

R900576760 DBDH6P1X/400V

R900576420 W-DBDS10K1X=315-210V

R900576208 MHDBDT06G0-2X/210T082M19

R900576207 MHDBDT06G0-2X/210T060M19

R900575360 MHDBDT06G0-2X/280T087M06

R900574514 MHDBD22P2-1X/420-350M

R900574510 MHDBD22P2-1X/420-400M

R900574504 MHDBD22K2-1X/315-230MFG

R900568575 DBDS4K1X/420

R900564044 MHDBD16P2-1X/315-220M

R900561430 DBDS20K1X/315JV

R900560474 DBDS8G1X/50V

R900558236 MHDBDT06G0-2X/280T075M06

R900556737 MHDBDT06G0-2X/280T050M06

R900556575 MHDBDT06G0-2X/280T100M06

R900556574 MHDBDT06G0-2X/280T060M06

R900556573 MHDBDT06G0-2X/280T082M06

R900545492 VENTILMHDBD02C10/350VM12X1,0Z13SW6

R900542687 VERSCHLUSSSCHRAUBEDBD.4K10/FKM*BG

R900540558 VENTILSITZDBD.30K15/SO74

R900539105 DBDS20P1X/200/12

R900539104 DBDS6P1X/100/12

R900538976 DBDS20K1X/200SO140

R900536979 DBDS20G1X/100SO74

R900536728 DBDS10G1X/25VSO102

R900535885 DBDS30P1X/315J

R900534613 DBDS15G1X/50/12

R900534133 DBDS10K1X/315SO138

R900533255 DBDS20K1X/100JV

R900532233 W-DBDS30K1X/25V

R900529359 DBDS4K1X/100V

R900528882 DBDS4K1X/315V

R900528162 DBDS4K1X/200

R900527929 MHDBD02K2-1X/315M-103

R900526752 DBDS25G1X/50/12

R900526571 DBDH15G1X/100V

R900526570 DBDS10G1X/50SO102

R900526488 W-DBDS6K1X/200V

R900523971 DBDA6G1X/200SO59

R900523060 DBDS10P1X/700

R900522970 DBDH6G1X/315/12SO127

R900522840 DBDA10G1X/200SO60

R900520692 DBDS6K1X/200SO59

R900520682 DBDH6K1X/315SO127

R900512896 DBDS25G1X/315V

R900508418 DBDS4K1X/315

R900502051 MHDBD10K2-1X/050M

R900499541 DBDS6K1X/100J

R900498932 DBDS6G1X/200J

R900498906 E-DBDS15G1X/50

R900497804 DBDS20K1X/25SO52

R900497357 DBDA6K1X/100V

R900497211 DBDS6P1X/100SO60

R900496699 DBDA10K1X/50V

R900496206 DBDH10K1X/700

R900496034 DBDS10K1X/630V

R900493801 DBDA10K1X/25V

R900492714 DBDA10P1X/50V

R900491662 DBDS10P1X/400V

R900489249 DBDA6K1X/315SO29

R900489216 W-DBDS20K1X/25

R900488859 DBDS20K1X/25VSO52

R900488857 DBDH30G1X/100V

R900488053 DBDS10K1X/25SO52

R900486899 DBDS20K1X/200SO60

R900486517 DBDS20K1X/25J

R900486516 DBDS20K1X/100J

R900486363 DBDS6G1X/100/12

R900486142 DBDS6P1X/315J

R900483990 W-DBDS6G1X/100

R900481860 W-DBDS10K1X/200

R900479048 DBDH6G1X/400V

R900478766 DBDS20G1X/400V

R900478420 DBDH10K1X/100V

R900478198 DBDA6K1X/200V

R900476862 DBDH6K1X/400V

R900475974 DBDS8G1X/25V

R900474980 DBDS10G1X/315J

R900474243 DBDS20K1X/25V

R900474169 DBDS15G1X/315V

R900473127 DBDS6K1X/200SO32

R900472963 DBDS10K1X/315SO52

R900472920 DBDH10P1X/50V

R900471837 DBDR10K1X/25

R900471617 MHDBD16P2-1X/420M-022

R900471398 DBDH10K1X/315V

R900470448 DBDH6G1X/400VSO51

R900470269 DBDS15G1X/25V

R900469298 DBDA10G1X/50

R900468547 DBDH6K1X/200V

R900468494 DBDH10G1X/400V

R900468297 DBDX10K1X/50SO20

R900468137 DBDS10K1X/315J

R900468034 DBDA10G1X/50V

R900466492 DBDH6G1X/400VSO44

R900466343 DBDS6P1X/200V

R900466112 DBDH6G1X/25V

R900465088 DBDS6K1X/315SO32

R900465087 DBDS6K1X/100SO32

R900464464 DBDH10P1X/25V

R900463844 DBDA20K1X/25

R900463686 DBDH6G1X/50V

R900463643 DBDH6G1X/100SO52

R900463563 DBDH10G1X/50V

R900463217 DBDH6G1X/200SO52

R900462948 DBDS30K1X/25V

R900462896 DBDS20G1X/25V

R900462778 DBDX6K1X/200SO20

R900462393 DBDS10K1X/25V

R900462315 DBDS4K1X/25

R900460668 DBDS6K1X/25V

R900459771 DBDS6P1X/400V

R900458682 DBDS15G1X/315/12

R900458636 DBDS10G1X/200J

R900458278 DBDH6G1X/315/12

R900457420 DBDS10K1X/400V

R900456823 DBDS6G1X/400V

R900456498 DBDH30P1X/100

R900454789 DBDR10K1X/315

R900454014 DBDH6K1X/100SO102

R900453780 DBDR6K1X/100

R900452327 DBDS20K1X/315J

R900451223 W-DBDS10K1X/315V

R900451077 DBDS6K1X/50SO113

R900450967 DBDS20K1X/400SO60

R900449495 DBDH10G1X/315V

R900449494 DBDH10G1X/25V

R900449380 DBDS8G1X/630

R900448375 DBDS6G1X/25V

R900448058 DBDS10K1X/200JV

R900447890 DBDH6K1X/315V

R900447684 DBDS20P1X/200V

R900446990 DBDS20G1X/315J

R900446684 DBDS10P1X/630V

R900446287 DBDS6K1X/200J

R900445875 DBDH30K1X/25

R900444974 DBDR10G1X/400

R900443433 W-DBDS30K1X/200

R900442913 DBDH25G1X/25

R900442143 DBDH8G1X/100

R900441987 DBDA8G1X/100

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常用液压名称名词解释

电磁阀（Electromagnetic valve）是用电磁控制的工业设备，是用来控制流体的自动化基础元件，属于执行器，并不限于液压、气动。用在工业控制系统中调整介质的方向、流量、速度和其他的参数。电磁阀可以配合不同的电路来实现预期的控制，而控制的精度和灵活性都能够保证。电磁阀有很多种，不同的电磁阀在控制系统的不同位置发挥作用，最常用的是单向阀、安全阀、方向控制阀、速度调节阀等。

电磁阀里有密闭的腔，在不同位置开有通孔，每个孔连接不同的油管，腔中间是活塞，两面是两块电磁铁，哪面的磁铁线圈通电阀体就会被吸引到哪边，通过控制阀体的移动来开启或关闭不同的排油孔，而进油孔是常开的，液压油就会进入不同的排油管，然后通过油的压力来推动油缸的活塞，活塞又带动活塞杆，活塞杆带动机械装置。这样通过控制电磁铁的电流通断就控制了机械运动。

柱塞泵是液压系统的一个重要装置。它依靠柱塞在缸体中往复运动，使密封工作容腔的容积发生变化来实现吸油、压油。柱塞泵具有额定压力高、结构紧凑、效率高和流量调节方便等优点，被广泛应用于高压、大流量和流量需要调节的场合，诸如液压机、工程机械和船舶中。机械分类 ? 轴向式 ? 直轴斜盘式 ? 径向式 ? 液压式柱塞泵一般分为单柱塞泵、卧式柱塞泵、轴向柱塞泵和径向柱塞泵。

比例阀阀对流量的控制可以分为两种：

一种是开关控制：要么全开、要么全关，流量要么最大、要么最小，没有中间状态，如普通的电磁直通阀、电磁换向阀、电液换向阀。

另一种是连续控制：阀口可以根据需要打开任意一个开度，由此控制通过流量的大小，这类阀有手动控制的，如节流阀，也有电控的，如比例阀、伺服阀。

所以使用比例阀或伺服阀的目的就是：以电控方式实现对流量的节流控制（当然经过结构上的改动也可实现压力控制等），既然是节流控制，就必然有能量损失，伺服阀和其它阀不同的是，它的能量损失更大一些，因为它需要一定的流量来维持前置级控制油路的工作。

换向阀是具有两种以上流动形式和两个以上油口的方向控制阀。是实现液压油流的沟通、切断和换向，以及压力卸载和顺序动作控制的阀门。

可分为手动换向阀、电磁换向阀、电液换向阀等。

又称克里斯阀，阀门的一种，具有多向可调的通道，可适时改变流体流向。

工作时借着阀外的驱动传动机构转动驱动轴，带动摇拐臂，启动阀板，使工作流体时而从左入口通向阀的下部出口，时而从右入口变换通向下部出口，实现了周期变换流向的目的。

这种变换阀在石油、化工生产中有着广泛的应用，在合成氨造气系统中最为常用。此外，换向阀还可作成阀瓣式的结构，多用于较小流量的场合。工作时只需转动手轮通过阀瓣来变换工作流体的流向。

溢流阀是一种液压压力控制阀，在液压设备中主要起定压溢流作用，稳压，系统卸荷和安全保护作用。

主要作用编辑定压溢流作用：在定量泵节流调节系统中，定量泵提供的是恒定流量。当系统压力增大时，会使流量需求减小。此时溢流阀开启，使多余流量溢回油箱，保证溢流阀进口压力，即泵出口压力恒定（阀口常随压力波动开启）。

节流阀是通过改变节流截面或节流长度以控制流体流量的阀门。将节流阀和单向阀并联则可组合成单向节流阀。节流阀和单向节流阀是简易的流量控制阀，在定量泵液压系统中，节流阀和溢流阀配合，可组成三种节流调速系统，即进油路节流调速系统、回油路节流调速系统和旁路节流调速系统。节流阀没有流量负反馈功能，不能补偿由负载变化所造成的速度不稳定，一般仅用于负载变化不大或对速度稳定性要求不高的场合。

齿轮泵是依靠泵缸与啮合齿轮间所形成的工作容积变化和移动来输送液体或使之增压的回转泵。由两个齿轮、泵体与前后盖组成两个封闭空间，当齿轮转动时，齿轮脱开侧的空间的体积从小变大，形成真空，将液体吸入，齿轮啮合侧的空间的体积从大变小，而将液体挤入管路中去。吸入腔与排出腔是靠两个齿轮的啮合线来隔开的。齿轮泵的排出口的压力完全取决于泵出处阻力的大小。

叶片泵因为历史的叶片泵根据中类型的不同有两种

一）专门指容积泵中的滑片泵。

二）指动力式泵的三泵（离心泵、混流泵、轴流泵）或其他特殊的泵。

这类泵产品一般不会叫叶片泵。但作为专著，叶片泵几乎全部是指离心泵、混流泵、轴流泵等。

根据其每转的理论排量是固定值还是可变值，可以分为叶片式变量泵和叶片式定量泵。

工作原理编辑叶片泵转子旋转时，叶片在离心力和压力油的作用下，尖部紧贴在定子内表面上。这样两个叶片与转子和定子内表面所构成的工作容积，先由小到大吸油后再由大到小排油，叶片旋转一周时，完成两次吸油与排油。

单向阀是流体只能沿进口流动，出口介质却无法回流的装置

单向阀 Check Valve

单向阀又称止回阀或逆止阀。用于液压系统中防止油流反向流动,或者用于气动系统中防止压缩空气逆向流动。

单向阀有直通式和直角式两种。直通式单向阀用螺纹连接安装在管路上。直角式单向阀有螺纹连接、板式连接和法兰连接三种形式。液控单向阀也称闭锁阀或保压阀，它与单向阀相同，用以防止油液反向流动。但在液压回路中需要油流反向流动时又可利用控制油压，打开单向阀，使油流在两个方向都可流动。液控单向阀采用锥形阀芯，因此密封性能好。在要求封闭油路时，可用此阀作为油路的单向锁紧而起保压作用。液控单向阀控制油的泄漏方式有内泄式和外泄式二种。在油流反向出口无背压的油路中可用内泄式；否则需用外泄式，以降低控制油压力。

压力继电器，液压术语，是液压系统中当流体压力达到预定值时，使电接点动作的元件。

2.是将压力转换成电信号的液压元器件，客户根据自身的压力设计需要，通过调节压力继电器，实现在某一设定的压力时，输出一个电信号的功能。

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