力士乐压力继电器HED8OA-2X/200K14 R901102708，德国REXROTH压力传感器，购买进口液压、气动、自动化控制工业配件，认准“上海韦米机电设备有限公司”，7年老店，产品实拍，保证产品原厂原装，价格优惠，售后无忧，欢迎新老客户咨询采购！

液压-电气压力开关：
特点：
→用于底板安装
→用于 G1/4" 管道安装
→用于法兰连接，符合 ISO 16873 标准
→作为垂直叠加元件，与阀板相连接，符合 ISO 4401 标准
→5 个压力等级
→4 种调整类型：
→带/不带保护帽的调节杆
→带刻度的调节杆，带/不带保护帽
→带刻度旋钮
→带刻度可锁定旋钮
→电气连接
– 带有 A 设计的阀连接器
（大型方形连接器）
– 带 M12 x 1 连接器
→带常闭/常开触点功能的微动开关
→电流零电位转换（1 mA 至 2 A）
→压力范围经过 UL 认证，高达 350 bar

液压-电气压力继电器型号详情举例：
HED8OA-2X/200K14
1、
HED8  →柱塞式压力开关
2、
OH    →法兰连接
OP    →底板安装
OA    →管道安装
2、
2X    →组件系列 20 … 29（20 … 29：安装和连接尺寸不变）
4、
350   →*大压力等级 350 bar
50    →*大压力等级 50 bar
100   →*大压力等级 100 bar
200   →*大压力等级 200 bar
630   →*大压力等级 630 bar
5、电气连接，单个连接
K14   →不带连接插头，连接器DIN EN 175301-803
K35   →不带连接插头，连接器 IEC 61076-2-101，M12 x 1
6、调整类型
无代码  →内六角调节杆，不带刻度，不带保护帽
S       →内六角调节杆，不带刻度，带保护帽，密封
A       →带刻度调节杆，不带保护帽
AS      →带刻度调节杆，带保护帽
KS      →带刻度可锁定旋钮
KW      →带刻度旋钮
7、密封材料
无代码  →NBR 密封件
V       →FKM 密封件
MT      →低温密封件（*大 315 bar） 
请务必遵守密封件与所用液压油的兼容性！
1) 阀板用于垂直叠加，单独订购，请参阅附件
2) 不允许用于垂直叠加，不带低温密封件，未经过 UL 认证
3) 连接插头，单独订购，
4) H 钥匙，物料号 R900008158，包括在交付范围内
5) 只能使用压力计（刻度用于指示作用）精确设置切换压力
 
压力继电器用途性能
压力继电器是一种将油液的压力信号转换成电信号的液一电转换元件。当油液压力达到压力继电器的调定压力时，能自动接通或断开电路，使电磁铁、继电器、电动机等电气元件通电运转或断电停止工作，以实现对液压系统工作程序的控制、安全保护或元件动作的联锁等。任何压力继电器都是由压力一位移转换装置和微动开关两部分组成的，按压力一位移转换装置的结构划分，有柱塞式、弹簧管式、膜片式和波纹管式四类

压力继电器是利用液体的压力来启闭电气触点的液压电气转换元件。当系统压力达到压力继电器的调定值时，发出电信号，使电气元件（如电磁铁、电机、时间继电器、电磁离合器等）动作，使油路卸压、换向，执行元件实现顺序动作，或关闭电动机使系统停止工作，起安全保护作用等。

压力继电器有柱塞式、膜片式、弹簧管式和波纹管式四种结构形式。下面对柱塞式压力继电器的工作原理作一介绍：
当从继电器下端进油口3进入的液体压力达到调定压力值时，推动柱塞2上移，此位移通过杠杆放大后推动微动开关4动作。改变弹簧1的压缩量，可以调节继电器的动作压力。
应用场合：用于安全保护、控制执行元件的顺序动作、用于泵的启闭、用于泵的卸荷。
注意： 压力继电器必须放在压力有明显变化的地方才能输出电信号。若将压力继电器放在回油路上，由于回油路直接接回油箱，压力也没有变化，所以压力继电器也不会工作。
选用标准
根据所测对象的压力来选用,比如所测压力范围在8KG以内,那么就要选用额定10KG的压力继电器,还有要符合电路中的额定电压,接口管径的大小
3使用方法
首先用于安全保护时，将压力继电器设置在夹紧液压缸的一端，液压泵启动后，首先将工件夹紧，此时夹紧液压缸的右腔压力升高，当升高到压力继电器的调定值时，压力继电器动作，发出电信号使2YA通电，于是切削液压缸进刀切削。在加工期间，压力继电器微动开关的常开触点始终闭合。若工件没有夹紧，压力继电器2断开，于是2YA断电，切削液压缸立即停止进刀，从而避免工件未夹紧被切削而出事故。 
其实用于控制执行元件的顺序动作时，液压泵启动后，首先2YA通电，液压缸左腔进油，推动活塞方向右移。当碰到限位器(或死挡铁)后，系统压力升高，压力继电器发出电信号，使1YA通电，高压油进入液压缸的左腔，推动活塞右移。这时若3YA也通电，液压缸的活塞快速右移;若3YA断电，则液压缸的活塞慢速右移，其慢速运动速度由节流阀调节。
再次用于液压泵卸荷时，压力继电器不是控制液压泵停止转动，而是控制二位二通电磁阀，将液压泵5输出的压力油流回油箱，使其卸荷。
后用于液压泵的启闭时，有两个液压泵，高压小流量泵，低压大流量泵。当活塞快速下降时，两泵同时输出压力油。当液压缸活塞杆抵住工件开始加压时，压力继电器在压力油作用下发出动作，触动微动开关，将常闭触点断开，使液压泵停转。在加工过程中减慢液压缸的速度，同时减少动力消耗。
力士乐压力继电器HED8OA-2X/200K14 R901102708
力士乐REXROTH柱塞式压力继电器电液控制
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R901107913 HED8OP-2X/350K14SV
R901107330 HED8OP-2X/350K14V
R901127494 HED8OP-2X/350K35S
R901434285 HED8OP-2X/350P120K14KS
R901108252 HED8OP-2X/350P140K14S
R901456336 HED8OP-2X/350P280K14S
R901107083 HED8OP-2X/50K14
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R901108001 HED8OP-2X/50K14V
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R901108147 HED8OP-2X/630K14
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R987411811 HED8OP2X/350K14SSETTO280BAR
R971012678 HED8OA-2X/350K14S(12.3MPA)
R971012679 HED8OA-2X/350K14S(17.2MPA)
R971012681 HED8OA-2X/350K14S(21.6MPA)
R987136869 HED8OA2X/50K14STARATOA5BAR
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R901107332 HED8OA-20/350K14KW/12
R901110450 HED8OA-20/350K14KWV
R901102778 HED8OA-20/350K14S
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R901186318 HED8OA-20/350K14SV/12
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R901110163 HED8OA-20/50K14AV/12
R901102702 HED8OA-20/50K14KS
R901110160 HED8OA-20/50K14KSV
R901102754 HED8OA-20/50K14KW
R976722498 HED8OA-20/50K14KW-10BARSTEIGEND
R901108514 HED8OA-20/50K14KW/12
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R987255554 HED8OA-20/50K14S
R901155751 HED8OA-20/50K14S/12
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R901110147 HED8OA-20/50K14SV/12
R901117070 HED8OA-20/50K14V
R901109543 HED8OA-20/50K14V/12
R901173249 HED8OA-20/50K35
R901349292 HED8OA-20/50K35AS
R901336212 HED8OA-20/50K35KS
R901155571 HED8OA-20/50K35S
R901312177 HED8OA-20/50P010K14AS
R901213487 HED8OA-20/50P015K14S
R901244472 HED8OA-20/50R020K14S
R901355720 HED8OA-20/50U020K14S
R901107127 HED8OA-20/630K14
R901134765 HED8OA-20/630K14/12
R901275335 HED8OA-20/630K14A
R901108512 HED8OA-20/630K14AS
R901199523 HED8OA-20/630K14ASV
R901109541 HED8OA-20/630K14KS
R901109538 HED8OA-20/630K14KW
R901119175 HED8OA-20/630K14KW/12
R901107915 HED8OA-20/630K14S
R901130967 HED8OA-20/630K14SV
R901118228 HED8OA-20/630K14V
R901188553 HED8OA-20/630K35A
R901426835 HED8OA-20/630K35S
R901364935 HED8OA-20=100K14S
R901364011 HED8OA-20=200K14S
R901448964 HED8OA-20=200K14SV
R901364934 HED8OA-20=350K14S
R901222334 HED8OA-20=50K14AS
R987140396 HED8OA20/350K14+PISTOKE
R987140316 HED8OA20/50K14+PISTOKE
R987129279 HED8OH20/100Z14STS10AQ
R987128506 HED8OH20/200K14STARATOSEC.TS10AQ
R901102360 HED8OH-20/100K14
R901107128 HED8OH-20/100K14A
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R901109535 HED8OH-20/100K14ASV
R901099780 HED8OH-20/100K14AV
R901106498 HED8OH-20/100K14KS
R901099788 HED8OH-20/100K14KSV
R901107122 HED8OH-20/100K14KW
R901109532 HED8OH-20/100K14KWV
R901095375 HED8OH-20/100K14S
R901108268 HED8OH-20/100K14SV
R901099775 HED8OH-20/100K14V
R901125068 HED8OH-20/100K35KS
R901315927 HED8OH-20/100K35S
R901421283 HED8OH-20/100U060K14S
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R901099808 HED8OH-20/200K14
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R901099790 HED8OH-20/200K14AV
R901099811 HED8OH-20/200K14KS
R901099792 HED8OH-20/200K14KSV
R901107369 HED8OH-20/200K14KW
R901125810 HED8OH-20/200K14KWV
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R901109074 HED8OH-20/200K14SV
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R901099813 HED8OH-20/200U150K14V
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R901099793 HED8OH-20/200U185K14V
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R901108236 HED8OH-20/350K14AS
R901109071 HED8OH-20/350K14ASV
R901099816 HED8OH-20/350K14AV
R901106454 HED8OH-20/350K14KS
R901099817 HED8OH-20/350K14KSV
R901107095 HED8OH-20/350K14KW
R901109069 HED8OH-20/350K14KWV
R901102713 HED8OH-20/350K14S
R901109065 HED8OH-20/350K14SV
R901099815 HED8OH-20/350K14V
R901388617 HED8OH-20/350K35
R901417246 HED8OH-20/350K35AS
R901265207 HED8OH-20/350K35S
R901128257 HED8OH-20/50F004K14SV
R901219262 HED8OH-20/50F010K14V
R901102349 HED8OH-20/50K14
R901108007 HED8OH-20/50K14A
R901107086 HED8OH-20/50K14AS
R901109050 HED8OH-20/50K14ASV
R901099798 HED8OH-20/50K14AV
R901102356 HED8OH-20/50K14KS
R901099800 HED8OH-20/50K14KSV
R901107394 HED8OH-20/50K14KW
R901109049 HED8OH-20/50K14KWV
R901102712 HED8OH-20/50K14S
R901215098 HED8OH-20/50K14SV
R901099796 HED8OH-20/50K14V
R901156058 HED8OH-20/50K35KS
R901231720 HED8OH-20/50K35S
R901101658 HED8OH-20/630K14
R901109035 HED8OH-20/630K14AS
R901109039 HED8OH-20/630K14ASV
R901136386 HED8OH-20/630K14KS
R901307873 HED8OH-20/630K14KSV
R901336213 HED8OH-20/630K14KW
R901109029 HED8OH-20/630K14S
R901101649 HED8OH-20/630K14V
R901369355 HED8OH-20=200K14
R901342162 HED8OH-20=50K14
R901232375 HED8OH-20=50K14S
R987140394 HED8OH20/350K14+PISTOKE
R901102747 HED8OP-20/100K14
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R901106509 HED8OP-20/100K14S
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R901108265 HED8OP-20/100K14V
R901437159 HED8OP-20/100K35
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R901102721 HED8OP-20/200K14
R901108023 HED8OP-20/200K14A
R901108003 HED8OP-20/200K14AS
R901109024 HED8OP-20/200K14ASV
R901137607 HED8OP-20/200K14AV
R901108258 HED8OP-20/200K14KS
R901108018 HED8OP-20/200K14KW
R901109010 HED8OP-20/200K14KWV
R901107093 HED8OP-20/200K14S
R901109004 HED8OP-20/200K14SV
R901107397 HED8OP-20/200K14V
R901336909 HED8OP-20/200K35S
R901233431 HED8OP-20/200P110K14S
R901108992 HED8OP-20/200P160K14S
R901106453 HED8OP-20/350K14
R901107326 HED8OP-20/350K14A
R901091138 HED8OP-20/350K14AS
R901108531 HED8OP-20/350K14ASV
R901126082 HED8OP-20/350K14AV
R901107914 HED8OP-20/350K14KS
R901107129 HED8OP-20/350K14KW
R901122124 HED8OP-20/350K14KWV
R901102365 HED8OP-20/350K14S
R901107913 HED8OP-20/350K14SV
R901107330 HED8OP-20/350K14V
R901127494 HED8OP-20/350K35S
R901434285 HED8OP-20/350P120K14KS
R901108252 HED8OP-20/350P140K14S
R901456336 HED8OP-20/350P280K14S
R901107083 HED8OP-20/50K14
R901107999 HED8OP-20/50K14A
R901107396 HED8OP-20/50K14AS
R901123736 HED8OP-20/50K14AV
R901108012 HED8OP-20/50K14KS
R901108249 HED8OP-20/50K14KW
R901106504 HED8OP-20/50K14S
R901140517 HED8OP-20/50K14SV
R901108001 HED8OP-20/50K14V
R901131275 HED8OP-20/50K35
R901336910 HED8OP-20/50K35S
R901159161 HED8OP-20/50K35V
R901245432 HED8OP-20/50U025K14AV
R901108147 HED8OP-20/630K14
R901210429 HED8OP-20/630K14A
R901280745 HED8OP-20/630K14AS
R901171255 HED8OP-20/630K14ASV
R901124650 HED8OP-20/630K14KS
R901315271 HED8OP-20/630K14KW
R901106449 HED8OP-20/630K14S
R901108529 HED8OP-20/630K14V
R901437158 HED8OP-20/630K35
R901251521 HED8OP-20=50K14AS
R987437823 HED8OH-20/100K14SSETTO80BARFALLING
R987411811 HED8OP20/350K14SSETTO280BAR
R971012678 HED8OA-20/350K14S(12.3MPA)
R971012679 HED8OA-20/350K14S(17.2MPA)
R971012681 HED8OA-20/350K14S(21.6MPA)
液压系统中的压力控制阀
在液压系统中,压力控制阀可以调定系统主回路或分支回路的压力.按照功能分类,常用的压力控制阀有溢流阀,减压阀,顺序阀和压力继电器等.这些压力控制阀结构上相似,但性能有差别,在系统中的作用也不尽相同.搞清它们的区别与联系,对于学习压力控制回路以至液压系统的分析广片常重要的。
一,溢流阀
功能 溢流阀的功能是通过阀口溢流,使被控系统或回路的压力保持稳定,实现稳压,调压或限压的作用.
特点 按照结构,溢流阀有直动式和先导式两种.对于直动式溢流阀,当压力较高,流量较大时,要求调压弹簧有很大的刚度,调节性能较差,而滑阀的泄漏也使高压控制难以实现,故只能用于低压小流量场合.先导式溢流阀的特点是用先导阀控制主阀,在溢流阀主阀溢流时,溢流阀进口压力可维持为由先导阀弹簧所调定的定值.先导式溢流阀的另一特点是具有远程控制口,可很方便地实现系统卸荷或运程调压。
溢流阀的泄漏油或流经先导阀的油液在返回油祚时有内泄和外泄两种方式.内泄时泄漏油流经的弹簧腔或先导阀弹簧座通过阀体内的连接通道与出油口和通,而外泄是泄露油或流经先导阀的油液被直接单独引回油箱。
应用 溢流阀的主要用途:(1)在定量泵的出口并联溢流阀可调节泵的出口压力;(2)在变量泵的出口并联溢流阀可对系统起到过载保护作用;(3)在回油路上搂入直动式溢流阀可使执行元件运动平稳;(4)利用先导式溢流阀的远程控制口可实现系统卸荷或远程调压.总之,在系统中溢流阀可作为溢流阀,安全阀,背压阀使用,可以调节系统的压力或使系统卸荷.
二,减压阀
功能 减压阀的功能在于使流经减压阀的油液压力降低,并使与减压阀出口连接的回路压力保持稳定.即减压阀的出口压力可维持恒定,不受进口压力及通过流量的影响。
特点 按照结构减压阀也有直动式和先导式两种,分别用于不同场合.
碱压限的阀心处在原始位置上时,它的阀口是打开的,阀的进,出口沟通.阀心由出口处的压力控制,出口压力未达到调定压力时阀口全开,阀心不动.当出口压力达到调定压力时,阀心上移,阀口关小,在调定压力下达到平衡.当减压阀的出口处不输出油液时,它的出口压力仍能够基本保持恒定,此时有少量油液经先导阀流回油箱。
减压阀与溢流阀的主要区别为:(1)减压阀能保持出口处的压力基本不变,而溢流阀则保持进口处的压力基本不变;(2)在不工作时,减压阀的进出油口互通,溢流阀的进出油口不通;(3)减压阀要求外泄,其先导阀的弹簧腔需通过泄油口单独外接油箱,而溢流阀允许内泄,其先导阀弹簧腔通过阀体内的连接通道与出油口相通,不必单独外接油箱。
应用 减压阀主要用于降低系统某一支路的油液压力,在同一系统中得到两个或多个不同压力的回路.常用于夹紧支路,润滑支路或电液动换向阀的控制回路.需要注意的是减压阀具有压力损失,当分支油路比主油路的压力低很多,且流量较大时,可考虑采用高,低压泵分别供油.
三,顺序阀
功能 顺序阀的功能在于利用液压系统中的压力变化,控制油路通断来控制多个执行元件的顺序动作
特点 按照结构,顺序阀也有直动式和先导式两种.直动式顺序阀结构简单,动作灵敏但调定压力较低,较高压力时宜采用先导式顺序阀.根据控制压力来源的不同,顺序阀有内控式和外控式之分,请注意两者图形符号的区别.内控式顺序阀在进油路压力达到设定压力之前,阀口一直是关闭的,达到设定压力后阀口打开,使压力油进入油路;外控式顺序阀阀口的开闭与油路进口压力无关,仅取决于控制油路压力的大小。
顺序阀与溢流阀的主要区别为:(1)当顺序阀的出口与负载油路相通时,泄漏油和先导控制油必须外泄,而溢流阀的出口与回油相通,泄漏油和先导控制油可外泄也可内泄;(2)溢流阀的进口压力是限定的,即阀的调定压力,顺序阀的进口压力由负载决定,顺序阀开启后可随负载增加市进一步升高.
应用 顺序阀的主要用途为:(1)控制多个执行元件的顺序动作;(2)内控式顺序阀可作背压阀使用;(3)与单向阀并联组成平衡阀,锁定执行元件;(4)外控顺序阀可用于双泵供油系统的卸荷.
四,压力继电器
压力继电器是利用液体压力信号控制电气触点通断的液压电气转换元件,当油液的压力达到其设定压力时,压力继电器发出电信号,以控制电气元件动作,实现执行元件的顺序动作或系统的安全保护和动作互锁。