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。
1)调压范围：它是指减压阀输出压力P2的可调范围，在此范围内要求达到规定的精度。调压范围主要与调压弹簧的刚度有关。
(2)压力特性：它是指流量g为定值时，因输入压力波动而引起输出压力波动的特性。输出压力波动越小，减压阀的特性越好。输出压力必须低于输入压力—定值才基本上不随输入压力变化而变化。
(3)流量特性：它是指输入压力—定时，输出压力随输出流量g的变化而变化的持性。当流量g发生变化时，输出压力的变化越小越好。一般输出压力越低，它随输出流量的变化波动就越小。
它可将阀前管路较高的液体压力减少至阀后管路所需的水平。这里的传输介质主要是水。减压阀广泛用于高层建筑、城市给水管网水压过高的区域、矿井及其他场合，以保证给水系统中各用水点获得适当的服务水压和流量。鉴于水的漏失率和浪费程度几乎同给水系统的水压大小成正比，因此减压阀具有改善系统运行工况和潜在节水作用，据统计其节水效果约为30%。
减压阀的构造类型很多，以往常见的有薄膜式、内弹簧活塞式等。减压阀的基本作用原理是靠阀内流道对水流的局部阻力降低水压。
JB/T2203－1999《减压阀结构长度》为主的通用类。目前国内大多数减压阀生产厂家均按本标准设计生产，但本标准也不尽*，规格不全。气体减压阀大公称通径为DN500，水用减压阀大公称通径DN1000。根据厂家所生产的减压阀规格及掌握的资料来看，各厂家连接尺寸也不尽统一，建议通用机械研究所对JB/T2203－1999《减压阀结构长度》进行修订。建议设计院及用户按标准选用，减压阀生产厂家按标准设计制造。
调压步骤
不带/带大压力限制，不带/带集成电子元件 (OBE) 的先导式比例减压阀
DRE(M) 10, DRE(M)E 10
- 规格 10
- 组件系列 6X
- *作压力 315 bar
- 大流量 200 l/min
- 用于底板安装
- 大滞环 ± 3.5%
- 工作电压 24 V
DREM10-6X/200YG24-8K4M力士乐比例减压阀
德国力士乐 比例减压阀 比例伺服阀 压力控制阀 压力阀 Bosch Rexroth 博世力士乐
Bosch Rexroth Industrial Hydraulics
德国博世力士乐工业液压
先导式比例减压阀
特征：
- 用来降低系统工作压力
- 由比例电磁铁驱动
- 用于底板安装：安装面板按 DIN 24 340 D 型
- *三油路 A 至 Y，直径 6 mm
- 零设定值输入时低调节压力为 2 bar
- 设定值 - 压力特性曲线呈线性
- 断电时主阀芯从 B 回到 A
- 瞬态响应好
- 根据需要 A、B 之间可加单向阀
- 高安全压力，可选配
- 阀与电控器可同时提供
- DRE 型的控制器：
- 欧洲卡规格模拟放大器，型号 VT-VSPA1(K)-1
- 欧洲卡规格数字放大器，型号 VT-VSPD-1
- 模块化设计之模拟放大器，型号 VT 11724
- 带集成电控器的 DREE 型
- 设定值 - 压力特性曲线偏差比较小
- 压力增加或减少时的斜坡信号产生时间可独立调节
优选型号：
R900954506 DREE10-5X/50YMG24K31M
R900950719 DREE10-5X/100YMG24K31M
R900937022 DREE10-5X/200YMG24K31M
R900937209 DREE10-5X/315YMG24K31M
R900954511 DREE20-5X/50YMG24K31M
R900954508 DREE20-5X/100YMG24K31M
R900954509 DREE20-5X/200YMG24K31M
R900954510 DREE20-5X/315YMG24K31M
DREM10-6X/200YG24-8K4M力士乐比例减压阀
型号列举：
R901299774 DREE10-6X/100YG24K31A1V
R901269802 DREE10-6X/100YMG24K31A1V
R901273234 DREE10-6X/200YG24K31A1M
R901278309 DREE10-6X/315YMG24K31A1M
R901299828 DREE20-6X/100YG24K31A1V
R901277135 DREM10-6X/100YG24K4M
R901277137 DREM10-6X/200YG24K4M
R901277145 DREM20-6X/200YG24K4M
R901277148 DREM20-6X/315YG24K4M
R901289453 DREME10-6X/200YG24K31A1M
R901289455 DREME10-6X/200YMG24K31A1V
R901289457 DREME10-6X/315YG24K31A1M
R900915975 DREM10-5X/50YG24K4M
R901038327 DREM10-5X/50YMG24K4V
R900959045 DREM10-5X/50YMG24K4M
R900766187 DREM10-5X/100YG24K4V
R900915969 DREM10-5X/100YG24K4M
R900964831 DREM10-5X/100YMG24K4V
R900940764 DREM10-5X/100YMG24K4M
R900726891 DREM10-5X/200YG24K4V
R900915972 DREM10-5X/200YG24K4M
R900955652 DREM10-5X/200YMG24K4V

力士乐部分型号如下：
R901019708 DBW10A1-5X/315U6EG24N9K4
R900705014 DBW10B2-5X/200U6EW110N9K4
R900704859 DBW20A2-5X/315X6EG24N9K4
R900702563 DBW20BG2-5X/315X6EG24N9K4
R900701001 DBW10B1-5X/315-6EG12N9K4
R900700996 DBW20A2-5X/315YU6EG24N9K4
R900700995 DBW20BG1-4X/315-6EW230N9K4W65
R900700716 DBW10B3-5X/350-6EG24N9K4
R900700715 DBW20B3-5X/315-6EG24NK4
R900700672 DBW20BG2-4X/200U6EG24N9K4W65
R900700170 DBW10A2-5X/315-6EG24N9K4SO160
R900689850 GEHAEUSEDBW20G-4X/12W65
R900689849 GEHAEUSEDBW15G-4X/12W65
R900623960 GEHAEUSEDBW.-5X/./12
R900623959 GEHAEUSEDBW..-5X/
R900619804 DBW20B2-5X/315U6EG24N9K4V
R900619794 DBWC30B2-5X/315-6EW230N9K4
R900619598 DBW20B1-5X/315S6EG24N9K4R12
R900619391 DBW10BG2-4X/350Y6EG12N2K4W65
R900618747 DBW10A2-5X/200S6EG24N9K4R12
R900618723 DBW30B1-5X/100-6EW230N9K4
R900618579 DBW10B2-5X/315-210-6EG24N9K4
R900618569 DBW30B2N5X/315XS6EG24N9K4R12
R900618412 DBW10B2-5X/50Y6EG24N9K4
R900618313 DBW10B2-5X/200US6EG24K4QMBG24R12
R900617946 DBWC30B2-5X/315-6EG96N9K4SO561
R900617468 DBW20B2-5X/350YS6EG24N9K4R12
R900617267 DBW30BG2-5X/50US6EG24N9K4R12
R900617266 DBW30B2-5X/100Y6EG24N9K4
R900617102 DBW10BG2-4X/100-6EW110N9K4W65
R900617101 DBWC10B2-5X/315-6EW230N9K4
R900617095 DBW30.G2-5X/50
R900617086 DBW30A2N5X/50-6EG24N9K4
R900617032 LFA40DBW2-7X/025V
R900616946 DBW20B2-5X/350-320-6EG12N9K4
R900616333 DBW30BG2-5X/315XU6EG24N9K4
R900608787 DBW20B7-5X/200-6EG24N9K4
R900594056 DBW20.G2-4X/200W65
R900559800 DBW20B2-5X/200S6EG24N9K4R10
R900558442 DBW10B2-5X/200-6EG48N9K4
R900555108 DBW52BF2-3X/315U6EW230N9DAL
R900554301 DBW52BF2L3X/315YU6EG24N9DL
R900550746 DBW20B2-5X/100U6EG24N9K4
R900526938 LFA80DBWD2-6X/050
R900521125 DBW15.G2-4X/200W65
R900514042 LFA100DBW2-6X/025
R900509508 DBWC.2-5X/315-6S
R900478081 LFA100DBW2-6X/315
R900453255 LFA80DBW2-6X/400
811102303 DBW20BY3-5X/315X6EG24N9K4
811102187 DBW20BZ8-5X/315XYM6EG12N9K4
811102180 DBW20AZ8-5X/160XYM6EG24N9K4
811102179 DBW20BZ8-5X/160XYM6EG24N9K4
811102174 DBW20AZ8-5X/315XYM6EG24N9K4
811102173 DBW20BZ8-5X/315XYM6EG24N9K4
811101303 DBW10BY3-5X/315X6EG24N9K4
811101188 DBW10BZ5-5X/160XYM6EW230N9K4
811101187 DBW10BZ5-5X/315XYM6EG12N9K4
811101179 DBW10BZ5-5X/160XYM6EG24N9K4
811101176 DBW10AZ5-5X/315XYM6EW230N9K4
811101175 DBW10BZ5-5X/315XYM6EW230N9K4
811101173 DBW10BZ5-5X/315XYM6EG24N9K4
R901141177 DBW30BG2-5X/315-6SMG96N9K4
R901141024 DBW30A2N5X/315US6EG205N9K4R12
R901140508 DBW10A7-5X/350S6EW230N9K4R12
R901138403 DBW20A3-5X/200-6EW110N9K4
R901138328 DBW30B2N5X/200US6EG24N9K4R10
R901138228 DBW10A2-5X/350S6SMG24N9K4B12
R901137639 DBW30B2N5X/350-6EW110N9K4SO160
R901137277 DBW30B2N5X/315P290-6EG24N9K4SO160
R901137170 DBW10.2-5X/200U
R901137046 DBW30B2N5X/315P210-6EG24N9K4SO160
R901136836 DBW20B3-5X/315U6EW230N9K4
R901136831 DBW10B2-5X/315-6EG24N9K33L
R901136209 DBW52BF2-3X/315YU6EW230N9K4
R901135102 DBW30B3N5X/315-6EG24N9K4
R901134811 LFA32DBW2-7X/420P420X12
R901134483 DBW10BG2-5X/200S6EG24N9C4R12
R901134397 DBW10B2-5X/315XS6EW230N9K4R12
R901134119 DBW20B2-5X/315-6EG24NK4R10
R901133932 DBW52BF2-3X/315U6EW230N9K4SO6
R901133929 DBW52BF2-3X/100U6EW230N9K4SO6
R901133507 LFA32DBWD2-7X/315/12
R901133353 LFA25DBW2-7X/100V
R901133277 DBW20A2-5X/200S6EG24N9K4R12V
R901132628 DBW30B2N5X/350S6EW230N9K4R12
R901132261 DBW20B1-5X/100X6EG24N9K4
R901131936 DBW52BF2-3X/315XU6EW230N9K4
R901131428 DBW20A2-5X/200S6EW230N9K4R12
R901130857 DBW20B1-5X/50S6EG24N9K4R12

力士乐部分型号如下：
R901234793 DZ6DP2-52/150XV力士乐电磁球阀
R900049473 M-3SEW6U33/420MG125N9K4
R900049662 M-3SEW6U30/420MG24K4/B15
R900049834 M-3SEW6C33/420MG24N9K4/V
R900050514 M-3SEW6C30/420MG205N9K4
R900050515 M-3SEW6U36/420MG205N9K4
R900052392 M-3SED6CK13/350CG24N9K4
R900052621 M-3SED6UK10/350CG24N9K4
R900053414 M-3SEW6C36/630MG205N9K4
R900054345 M-3SEW6U36/630MG24N9K4/B12
R900058333 M-3SED6CK1X/350CG110N9K4
R900059240 M-3SEW6C33/420MG110N9K4
R900059506 M-3SEW6U30/420MG48N9K4
R900061683 M-3SEW6C3X/420MG24N9K4/B10
R900070706 M-3SEW6C3X/420MG24N9K4/B15
R900077153 M-3SEW6U3X/420MG24N9K4/B20
R900082565 M-3SEW6C3X/420MG24N9K4/B15V
R900083344 M-3SED6CK1X/350CG24K4
R900200031 M-3SED6CK1X/350CG24N9K4/B12
R900201827 M-3SEW6C36/630MG24N9K4/B08
R900204628 M-3SEW6C36/630MG24N9K4/V
R900205383 M-3SEW6C36/630MG12N9K4
R900206079 M-3SEW6U36/420MG24N9K4/B22
R900206118 M-3SED6CK1X/350CG220N9K4
R900208947 M-3SEW6C3X/420MG48N9K4
R900210349 M-3SEW6C36/420MG110N9K4/V
R900213405 M-3SEW6U36/420MG205N9K4/V
R900214243 M-3SEW6C36/420MG125N9K4/V
R900215048 M-3SEW6U36/630MG110N9K4
R900215709 M-3SED6UK1X/350CG24N9K4/B12
R900216750 M-3SED6CK1X/350CG48N9K4
R900218867 M-3SEW6U36/630MG24N9K4/V
R900218944 M-3SEW6C36/630MG110N9K4
R900219798 M-3SEW6U36/630MG24N9K4/B12V
R900220093 M-3SEW6U36/420MG110N9K4/V
R900220648 M-3SEW6C36/420MG24N9K4/B12V
R900221358 M-3SED6UK1X/350CG24N9K4/V
R900222077 M-3SEW6C3X/630MG12N9K4/V
R900223676 M-3SED6UK10/350CG24K4
R900223863 M-3SED6CK10/350CG205N9K4
R900223864 M-3SED6CK10/350CG24N9K4/P
R900223868 M-3SED6UK13/350CG12N9K4
R900223869 M-3SED6UK13/350CG205N9K4
R900223893 M-3SED6UK10/350CG110N9K4/V
R900224325 M-3SED6CK13/350CG12N9K4
R900224328 M-3SED6CK13/350CG125N9K4
R900224340 M-3SED6CK13/350CG205N9K4/B18V
R900224494 M-3SED6CK13/350CG205K4
R900224512 M-3SED6CK13/350CG24N9K4/B10
R900224515 M-3SED6CK10/350CG24N9K4/B15V
R900224517 M-3SED6CK10/350CG24N9K4/B18
R900224520 M-3SED6CK10/350CG24N9K4/B20
R900224526 M-3SED6CK10/350CG24N9K4/V
R900224566 M-3SED6UK10/350CG110N9K4
R900224576 M-3SED6UK10/350CG125N9K4
R900224588 M-3SED6UK10/350CG205N9K4/V
R900224603 M-3SED6UK10/350CG24N9K4/B10
R900224606 M-3SED6UK1X/350CG24N9K4/B15
R900224609 M-3SED6UK10/350CG24N9K4/B20
R900224611 M-3SED6UK10/350CG24N9K4/B22
R900225704 M-3SEW6C33/420MG125N9K4
R900227753 M-3SEW6U33/420MG24N9K4/B12V
R900243436 M-3SEW6U33/420MG24N9K4/B10V
R900566273 M-3SEW6C33/420MG24N9K4
R900566279 M-3SEW6C3X/630MG24N9K4
R900566283 M-3SEW6U30/420MG24N9K4
R900566289 M-3SEW6U30/630MG24N9K4
R900569794 M-3SEW6U30/420MG24K4
R900569890 M-3SEW6C3X/420MG24K4
R900570174 M-3SEW6U3X/420MG24N9K4/V
R900570516 M-3SEW6U36/420MG24N9K4/B15
R900571656 M-3SEW6C3X/420MG24N9K4/B20
R900571657 M-3SEW6U3X/420MG24N9K4/B12
R900572095 M-3SEW6U3X/630MG24N9K4/B10
R900573247 M-3SEW6U3X/420MG24N9K4/B10
R900715823 M-3SEW6C3X/630MG24N9K4/B12V
R900727248 M-3SEW6C3X/420MG24N9K4/B08V
R900748520 M-3SED6CK1X/350CG125N9K4/B18
R900749128 M-3SEW6U30/420MG110N9K4/B08
R900776191 M-3SEW6U30/420MG125N9K4/V
R900987662 M-3SEW6C30/420MG205N9K4/V
R900987800 M-3SEW6C3X/420MG125N9K4/B15
R900991112 M-3SEW6U33/420MG12N9K4
R900994396 M-3SEW6C36/420MG12N9K4
R901039966 M-3SEW6U30/630MG110N9K4/V
R901064636 M-3SEW6C36/630MG110N9K4/B10
R901190672 M-3SEW6U30/630MG110N9K4/B15
R978020803 M-3SEW6U30/630MG24N9K4/B18
R978028081 M-3SEW6C30/420MG125N9K4/B15V
R978906593 M-3SED6UK1X/350CG24N9K4/B30
R978915390 M-3SEW6U3X/630MG110N9K4/V
R978915769 M-3SEW6U3X/420MG24N9K4/B20V


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