比例閥采用閥芯+閥體結(jié)構(gòu)。伺服閥和伺服比例閥主要應(yīng)用在閉環(huán)控制系統(tǒng)，比例閥的驅(qū)動(dòng)裝置是比例電磁鐵。
伺服閥的驅(qū)動(dòng)裝置是力馬達(dá)或力矩馬達(dá).閥體兼作閥套。
驅(qū)動(dòng)裝置不同.所以近些年出現(xiàn)了比例伺服閥。
比例閥一般最高幾十Hz，伺服閥中位沒有死區(qū)，伺服閥對(duì)液壓油液的要求更高.性能參數(shù)不同；否則容易堵塞，
用來控制流量和流向，比例閥要求低一些.比例閥有中位死區(qū)；
比例閥和伺服閥的區(qū)別主要體現(xiàn)在以下幾點(diǎn)：
逐漸向伺服閥靠近，
比例換向閥屬于比例閥的一種，滯環(huán)、中位死區(qū)、頻寬、過濾精度等特性不同.閥的額定壓降不同；比例換向閥具有與普通換向閥相似的中位機(jī)能，
而比例伺服閥性能介于伺服閥和比例閥之間，因此應(yīng)用場合不同，伺服閥和伺服比例閥采用閥芯+閥套的結(jié)構(gòu)。中位機(jī)能種類不同.其它結(jié)構(gòu)的比例閥主要應(yīng)用在開環(huán)控系統(tǒng)及閉環(huán)速度控制系統(tǒng)；因?yàn)楸壤y的性能越來越好；2伺服閥的頻響（響應(yīng)頻率）更高。閥芯結(jié)構(gòu)及加工精度不同.伺服閥與比例閥之間的差別并沒有嚴(yán)格的規(guī)定。
，可以高達(dá)200Hz左右，需要精過濾才行，而伺服閥中位機(jī)能只有O型（Rexroth產(chǎn)品的E型）。
型號(hào) 4WRL 和 4WRLE
德國REXROTH力士樂高頻響方向閥4WRL
高頻響方向閥，先導(dǎo)式，帶電位反饋4WRPH6C3B24L-2X/G24Z4/M 0811404035
規(guī)格10至35
安裝面按DIN 24340 A型和ISO 4401
控制流量的方向和大小
用于動(dòng)力、位置、速度和位置的閉環(huán)控制
RV-PL先導(dǎo)控制閥
閉環(huán)位置控制先導(dǎo)控制閥和主級(jí)
帶不同閥標(biāo)記的模塊系統(tǒng)
集成電控器（OBE），用于4WRLE
標(biāo)準(zhǔn)和非線性特性曲線
德國REXROTH力士樂4WRL系列高頻響方向閥
R901131953 4WRLE25Q3-370M-3X/G24K0/A1M
R901102544 4WRLE16W1-180SJ-3X/G24K0/A1M
R901089293 4WRLE16V200M-3X/G24ETK0/A1M
R901132613 4WRLE16V1-200M-3X/G24TK0/A1V
R901132535 4WRLE16V120M-3X/G24TK0/A1V
R901131728 4WRLE25V370M-3X/G24K0/B5M
R901131008 4WRLN27Q4-430M-3X/MXY/24CA6A
R9011208117 4WRLE16V200L-3X/G24ETK0/A1M
R9011208116 4WRLE16V120L-3X/G24ETK0/A1M
0811404094 4WRL10V85M-3X/G24Z4/M
R901126915 4WRLE35E1-1100SJ-3X/G24K0/A1M
R901125761 4WRL27E430S-3X/G24EZ4/M
R901124948 4WRLE25EZ350SJ-3X/G24K0/A1WG082M
R901124887 4WRLE25E4-350SJ-3X/G24EK0/A1M
R901118992 4WRLE25V370M-3X/G24ETK0/F1M
R901118991 4WRLE16V1-120M-3X/G24K0/F1M
R901111711 4WRLE35V1000M-3X/G24EK0/F1M
R901106966 4WRLE10Q4-85M-3X/G24K0/A1M
R901102544 4WRLE16W1-180SJ-3X/G24K0/A1M
R901097659 4WRLE10E80SJ-3X/G24TK0/A1M
R901095626 4WRL16E1Z180S-3X/G24ETZ4/M
R901094014 4WRLE16V1-120M-3X/G24TK0/A1M
R901091344 4WRLE10V55M-3X/G24K0/F1M
R901089293 4WRLE16V200M-3X/G24ETK0/A1M
R901088123 4WRLE16Q5-200M-3X/G24ETK0/A1M
R901087984 4WRLE16V200M-3X/G24EK0/A1M
R901086253 4WRL16EZ180S-3X/G24ETZ4/M
0811J04309 4WRLE16XZ110SJ-3X/G24K0/A1M-768
0811J04277 4WRLE16X200L-3X/G24TK0/B5M-780
0811J04253 4WRLE16X200M-3X/G24K0/A1WG02M-776
0811A04658 4WRLE10X85M-3X/G24K0/A1WG02M-813
0811404717 4WRLE10W4-80SJ-3X/G24K0/A1WX02M-864
0811404716 4WRLE10X50SJ-3X/G24K0/A1M-800
0811404715 4WRLE10E1-80SJ-3X/G24ETK0/A1M
0811404713 4WRLE10E80SJ-3X/G24ETK0/A1M
0811404712 4WRLE10W1-80SJ-3X/G24EK0/A1WX02M-756
0811404711 4WRLE10W4-80SJ-3X/G24K0/A1M
0811404708 4WRLE10W1-80SJ-3X/G24EK0/A1WX02M-744
0811404707 4WRLE10W80SJ-3X/G24ETK0/A1M
0811404706 4WRLE10E1-80SJ-3X/G24K0/A1M-755
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0811404703 4WRLE10W1-80SJ-3X/G24K0/A1M
0811404702 4WRLE10W80SJ-3X/G24K0/A1M
0811404701 4WRLE10E1-80SJ-3X/G24K0/A1M
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0811404687 4WRLE10V70P-3X/G24K0/A1M
0811404683 4WRLE10V85M-3X/G24ETK0/A1M-810
0811404681 4WRLE10V85M-3X/G24ETK0/F1M
0811404680 4WRLE10Q3-85M-3X/G24ETK0/A1M
0811404678 4WRLE10V55M-3X/G24ETK0/A1M-810
0811404677 4WRLE10X85M-3X/G24K0/A1M-0811
0811404673 4WRLE10V1-85M-3X/G24ETK0/A1M
0811404672 4WRLE10V1-85M-3X/G24K0/A1M
0811404670 4WRLE10Q4-85M-3X/G24ETK0/A1M
0811404668 4WRLE10Q4-85M-3X/G24TK0/A1M
0811404665 4WRLE10Q5-85M-3X/G24ETK0/A1M
0811404664 4WRLE10V85M-3X/G24K0/B5M
0811404663 4WRLE10V55M-3X/G24K0/B5M
0811404662 4WRLE10V85M-3X/G24ETK0/A1M
0811404661 4WRLE10V55M-3X/G24ETK0/A1M
0811404660 4WRLE10V85M-3X/G24TK0/A1M
0811404659 4WRLE10V55M-3X/G24TK0/A1M
0811404657 4WRLE10V55M-3X/G24ETK0/A1V
0811404656 4WRLE10X85M-3X/G24ETK0/A1M-812
0811404653 4WRLE10V85M-3X/G24K0/A1M
0811404652 4WRLE10V55M-3X/G24K0/A1M
0811404588 4WRLE35R5-1100SJ-3X/G24EK0/A1M-868
0811404587 4WRLE35Q5-1000M-3X/G24EK0/A1WG02M
0811404585 4WRLE35X1000M-3X/G24K0/A1M-848
0811404583 4WRLE35V1000M-3X/G24K0/A1M-834
0811404580 4WRLE35Q3-1000M-3X/G24TK0/A1M
0811404579 4WRLE35V1000M-3X/G24K0/A1M
0811404578 4WRLE35X500M-3X/G24EK0/A1M-812
0811404577 4WRLE35X1000M-3X/G24K0/A1M-812
0811404576 4WRLE35X1000M-3X/G24EK0/A1M-812
0811404575 4WRLE35X500M-3X/G24K0/A1M-812
0811404574 4WRLE27V1-430M-3X/G24K0/F1M
0811404573 4WRLE25V370M-3X/G24K0/F1M
0811404572 4WRLE27Q3-550P-3X/G24K0/A1M
0811404571 4WRLE27Q5-430M-3X/G24EK0/A1WG02M
0811404570 4WRLE25V370M-3X/G24EK0/F1M
0811404568 4WRLE25X370M-3X/G24TK0/A1M-0811
0811404567 4WRLE27Q3-430M-3X/G24K0/A1WG02M
0811404566 4WRLE25Q3-370M-3X/G24K0/A1WG02M
0811404560 4WRL35V1000M-3X/G24Z4/M-923
0811404508 4WRLE35R5-1100SJ-3X/G24EK0/A1WX02M-745
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