典型的力士樂伺服閥由永磁力矩馬達、噴嘴、檔板、閥芯、閥套和控制腔組成（見圖）。當輸入線圈通入電流 伺服閥時，檔板向右移動，使右邊噴嘴的節(jié)流作用加強，流量減少，右側背壓上升；同時使左邊噴嘴節(jié)流作用減小，流量增加，左側背壓下降。閥芯兩端的作用力失去平衡, 閥芯遂向左移動。高壓油從S流向C2，送到負載。負載回油通過 C1流過回油口，進入油箱。閥芯的位移量與力矩馬達的輸入電流成正比，作用在閥芯上的液壓力與彈簧力相平衡，因此在平衡狀態(tài)下力矩馬達的差動電流與閥芯的位移成正比。如果輸入的電流反向，則流量也反向。表中是伺服閥的分類。
力士樂伺服閥主要用在電氣液壓伺服系統(tǒng)中作為執(zhí)行元件（見液壓伺服系統(tǒng)）。在伺服系統(tǒng)中，液壓執(zhí)行機構同電氣及氣動執(zhí)行機構相比，具有快速性好、單位重量輸出功率大、傳動平穩(wěn)、抗干擾能力強等特點。另一方面，在伺服系統(tǒng)中傳遞信號和校正特性時多用電氣元件。因此，現代高性能的伺服系統(tǒng)也都采用電液方式，伺服閥就是這種系統(tǒng)的必需元件。
力士樂伺服閥結構比較復雜，造價高，對油的質量和清潔度要求高。新型的伺服閥正試圖克服這些缺點，例如利用電致伸縮元件的伺服閥，使結構大為簡化。另一個方向是研制特殊的工作油（如電氣粘性油）。這種工作油能在電磁的作用下改變粘性系數。利用這一性質就可通過電信號直接控制油流。
R900698790 HUELSE 4WS2E.10-4X/45E
R900696885 HUELSE 4WS2E.10-4X/75E
R900690645 KAPPE 4WS2E. 10 -4X/力士樂Rexroth
R900684799 GEHAEUSE 4WS2E. 10 -4X/1.STUFE
R900648179 HUELSE 4WS2E.10-4X/75C-24
R900643682 DUESE 0,2 M8X1,0 X17,5 SW3 4WS2E.10-43/力士樂Rexroth
R900643681 DUESE 0,27 M8X1,0 X17,5 SW3 4WS2E.10-43/
R900643680 DUESE 0,4 M8X1,0 X17,5 SW3 4WS2E.10-43/
R900643679 DUESE 0,5 M8X1,0 X17,5 SW3 4WS2E.10-43/力士樂Rexroth
R900637136 DUESE 0,3 M8X1,0 X17,5 SW3 4WS2EM10-42/
R900622564 HUELSE 4WS2E.10-4X/60E
R900622528 HUELSE 4WS2E.10-4X/20E力士樂Rexroth
R900621358 HUELSE 4WS2E.10-4X/30E
R900619398 4WS2EM10-5X/60B11ET315K31DV
R900618307 4WS2EM10-5X/20B11-210K31EV力士樂Rexroth
R900617993 4WS2EM6-2X/20B12ET210K17EV
R900617678 4WS2EM6-2X/5B12ET210K17EV
R900596308 4WS2EM10A-4X/2B2ET315K8DM力士樂Rexroth
R900595797 4WS2EM10-4X/10B1ET315CAM
R900585797 4WS2EM10-4X/75B3ET315K8DM
R900584270 4WS2EM10-4X/10B3ET315K8AV-7力士樂Rexroth
R900583336 4WS2EM10-4X/20B2ET315K8EM
R900582609 4WS2EM10-4X/30B2ET315K0DM-60
R900568584 4WS2EM10A-4X/45B3ET315K8EM力士樂Rexroth
R900560820 4WS2EM10-4X/45B2ET315K8EV
R900560353 4WS2EB10-4X/10B2ET70K8AM
R900556374 VT 17010-1X/0 （MOD.VT-SR1/0 4WS2EM10） 力士樂Rexroth
R900555078 VTS 0616-1X/SR92/0/4WS2EM10
R900551017 4WS2EM10A-4X/10B2ET315K8DM
R900542288 BAUSATZ 4WS2EM 16 -24/150B12.315K8M 1.ST力士樂Rexroth
R900540676 BAUSATZ 4WS2E. 10 .-42/ STEUEREINHEIT
R900540227 PLATTE 4WS2EB 10 .-41/E.M
R900534062 4WS2EB10-4X/60B2E70K8DM力士樂Rexroth
R900526719 4WS2EM10-4X/45B2ET315K8EM
R900524418 4WS2EM10-4X/2B2ET315K8DM
R900522193 4WS2EM16-2X/150B12T210K8EM力士樂Rexroth
R900520413 4WS2EM10-4X/10B3ET315K8AM
R900510650 4WS2EM10-4X/20B2T315K8DM
R900508857 4WS2EM10-4X/45B2ET315K8BM力士樂Rexroth
R900505743 4WS2EB10-4X/10B2ET140K8AM
R900501001 4WS2EM10-4X/10B2ET315K8BM-52
R900472884 4WS2EM10-4X/30B3ET315K8AM-10力士樂Rexroth
R900472869 4WS2EM10-4X/30B2ET315K8AM
R900472730 4WS2EM10-4X/5B3ET315K8DM
R900470068 4WS2EM10-4X/45B3ET315K8DM力士樂Rexroth
R900448828 4WS2EM10-4X/30B2ET315K0DM-53
R900448827 4WS2EM10-4X/10B2ET315K0DM-53
R900444077 4WS2EM10-4X/30B2ET315K8DV力士樂Rexroth
R900443028 4WS2EM10-4X/10B2ET315K8DV
R900441328 4WS2EM10-4X/60B1ET315K8AM
R961001956 DICHTUNGSSATZ 10A-MO/RN 4WS2E.10-4X/力士樂Rexroth
R961001954 DICHTUNGSSATZ 10A-VO/RN 4WS2E.10-4X/
R901139385 4WS2EM6-2X/20B11ET315K17EV-100
R901127976 4WS2EM10-5X/20B11T210K31DV力士樂Rexroth
R901120159 4WS2EM10-5X/20B11T315K31CV-102
R901119977 4WS2EM10-5X/30B11ET210K31DV
R901119296 4WS2EM10-5X/10B11T210K31CV-102力士樂Rexroth
R901119176 4WS2EM10-5X/60B11ET210K31AV
R901119156 4WS2EM10-5X/75B11XHET210K31EV-100
R901116633 4WS2EM10-5X/5B11XHET315K31EV-100力士樂Rexroth
R901114271 4WS2EM10-5X/45B11T315K8CV-104
R901113388 4WS2EM10-5X/30B11ET315K8DV
R901108852 4WS2EM10-5X/60B11XHE315K31EV力士樂Rexroth
R901108851 4WS2EM10-5X/75B11XHE315K31EV
R901101919 4WS2EM10-5X/20B11XHET315K31EV-100
R901101469 4WS2EM10-5X/75B11T315K8CV-104力士樂Rexroth
R901098304 4WS2EM10-5X/10B11XHET315K31EV-100
R901098041 4WS2EM10-5X/30B11ET315K31AV
R901097271 4WS2EM10-4X/60B1T315K8EV力士樂Rexroth
R901096801 BETRIEBSANLEITUNG4WS2EM10-5X/XH-102EU
R901096782 BETRIEBSANLEITUNG 4WS2EM10-5X/XH-100EU
R901096781 4WS2EM10-5X/30B11VH1ET315K31DV-114力士樂Rexroth
R901096114 4WS2EM10-5X/5B11ET315K31DV
R901095313 4WS2EM10-5X/20B11T315K31EV
R901091476 4WS2EM6-2X/25B11ET315K17EV力士樂Rexroth
R901091443 4WS2EM10-5X/10B11T315K8AV
R901086626 4WS2EM10-5X/90B11XHET315K31EV
R901081620 4WS2EE10-4X/20B2T70K8DV力士樂Rexroth
R901079357 4WS2EM10-4X/45B2ET315K8EV-10
R901078195 4WS2EM10-4X/30B1ET315K8DV
R901077583 4WS2EM10-5X/20B11ET210K8DV力士樂Rexroth
R901075694 4WS2EM10-5X/30B11T315K31AV
R901070225 4WS2EM10-5X/20B11T315K8EV
R901068705 4WS2EM6-2X/10B11XNET315K17EV-102力士樂Rexroth
R901068386 4WS2EM10-5X/45B11E210K8AV
R901066652 4WS2EM10-5X/60B11ET315K31CV-114
R901066564 4WS2EM10-5X/30B11XHET315K31EV力士樂Rexroth
R901066412 4WS2EM10-5X/20B11XNT315K31EV-102
R901066145 4WS2EM10-5X/75B11ET315K8DV
R901065784 4WS2EM10-5X/20B11ET315K8DV力士樂Rexroth
R901063738 4WS2EM10-5X/45B11T315K31CV-102
R901060892 4WS2EM10-5X/45B11T315K31CV-114
R901060775 4WS2EM10-5X/30B11-210K8AV力士樂Rexroth
R901059697 4WS2EM10-5X/20B11T315K31DV
R901056159 4WS2EM10-5X/60B11ET210K8DV
R901052147 4WS2EM10-5X/5B11XHET315K31EV力士樂Rexroth
R901046075 4WS2EM10-5X/60B11T315K31DV
R901042538 4WS2EM10-5X/60B11ET315K31EV-102
R901042537 4WS2EM10-5X/20B11ET315K31EV-102力士樂Rexroth
R901042530 4WS2EM10-5X/10B11ET315K31EV-102
R901040717 4WS2EM10-5X/5B11ET315K8EV
R901039619 4WS2EM10-5X/75B11XHT315K31EV力士樂Rexroth
R901038987 4WS2EM6-2X/10B11XNET315K17EV-100
R901038907 BETRIEBSANLEITUNG 4WS2EM10-5X/XH-104EU
R901035207 BETRIEBSANLEITUNG 4WS2EM6-2X/XN-102EU力士樂Rexroth
R901035195 BETRIEBSANLEITUNG 4WS2EM6-2X/XN-100EU
R901034450 BETRIEBSANLEITUNG 4WS2EM10-5X/XN-114EU
R901034449 BETRIEBSANLEITUNG 4WS2EM10-5X/XN-102EU力士樂Rexroth
R901034448 BETRIEBSANLEITUNG 4WS2EM10-5X/XN-100EU
R901032922 4WS2EM10-5X/75B11XHET315K31DV
R901030853 4WS2EM6-2X/15B11ET210K17EV力士樂Rexroth
R901030788 4WS2EM16-2X/150B12T315K8CV
R901029927 4WS2EM10-5X/75B11XHET315K31EV
R901029926 4WS2EM10-5X/45B11XHET315K31EV力士樂Rexroth
R901029799 4WS2EM10-5X/30B11T315K31CV
R901024442 4WS2EM10A-4X/20B3T315K8DV
R901020281 4WS2EM10-5X/45B11T315K8EV力士樂Rexroth
R901020256 4WS2EM10-5X/60B11ET315K8DV
R901017639 BETRIEBSANLEITUNG4WS2EM10-5X/XH-EU
R901017598 4WS2EM10-4X/30B2ET315K8EM力士樂Rexroth
R901016900 4WS2EM10-5X/60B0T315K31CV-112
R901011692 4WS2EM10-5X/20B11XHET315K31EV
R901011569 4WS2EM10-5X/45B11ET315K8DV力士樂Rexroth
R901010583 BETRIEBSANLEITUNG4WS2EM6-2X/XN-EU
R901009654 4WS2EM6-2X/5B11XNET315K17EV-102
R901009199 4WS2EM10-5X/45B11ET210K31EV-116力士樂Rexroth
R901008831 4WS2ED10-5X/75B11-315K31EV-117
R901007772 4WS2EM6-2X/20B11XNET315K17EV-100
R901007771 4WS2EM10-5X/60B11XNT315K31CV-114力士樂Rexroth
R901007770 4WS2EM10-5X/75B11XNT315K31CV-114
R901007768 4WS2EM6-2X/20B11XNET315K17EV-102
R901006867 4WS2EM10-5X/45B11ET210K8AV力士樂Rexroth
R901006100 4WS2EM10-4X/45B2ET315K8DM-59
R901004485 4WS2EM6-2X/0B12ET315K17EV-113
R901003060 4WS2EM10-5X/45B11T315K31EV力士樂Rexroth
R901003007 4WS2EM10-5X/20B11ET315K31AV
R901000155 4WS2EM6-2X/5B11ET315K17DV
R900979140 4WS2EM16-2X/200B12ET210K8EV力士樂Rexroth
R900978618 4WS2EM16-2X/100B12ET210K8EV
R900978355 4WS2EM10-5X/45B11ET210K31EV
R900977832 4WS2EM6-2X/20B11ET315K17EV-102力士樂Rexroth
R900977335 4WS2EM10-5X/60B11ET210K31EV
R900977287 4WS2EM10-4X/75B2ET315K8DV
R900977215 4WS2EB10-4X/5B2ET40K8AV力士樂Rexroth
R900976945 4WS2EM10-5X/90B11ET210K31EV
R900976837 4WS2EM10-5X/75B11T315K8DV
R900975809 4WS2EM10-5X/45B11ET315K8EV力士樂Rexroth
R900974304 4WS2EM6-2X/5B11ET210K17EV
R900973514 4WS2EM10-4X/75B2ET315K8DV-24
R900972795 4WS2EB10-4X/10B1-70K8AV力士樂Rexroth
R900971159 4WS2EM6-2X/2B12ET315K17EV
R900971033 4WS2EM10-4X/45B2T315K8DM
R900970346 4WS2EM6-2X/5B12ET315K17EV力士樂Rexroth
R900970191 4WS2EM6-2X/15B12ET315K17EV
R900970190 4WS2EM6-2X/20B12ET315K17EV
R900969969 4WS2EB10-4X/45B2ET210K8AV力士樂Rexroth
R900969967 4WS2EB10-4X/60B2-140K8BV
R900969730 4WS2EM6-2X/15B12ET210K17EV
R900968833 4WS2EM6-2X/10B12ET315K17EV力士樂Rexroth
R900968259 4WS2EM10-5X/60B11ET315K31AV
R900967562 4WS2EB10-4X/10B2ET40K8AV
分辨率：每圈分辨率8,192,zui大圈數8,192（SSI接口zui大25位）
外形尺寸（毫米）：ATM60: 60, ATM90: 93
接口/ 驅動器：SSI或并口（推挽式）,Profibus, DeviceNet
電源電壓（伏特）：DC 10...32 實心軸
伺服法蘭：6mm 實心軸
面裝法蘭：10mm實心軸
zui大運行速度：6.000
工作環(huán)境溫度: - 20°C ... +85 °C
連接類型：徑向電纜，徑向圓形車削螺紋連接器系統(tǒng)
防護等級：IP67
盲孔型
軸直徑：6mm, 8mm, 10mm, 12mm, 15 mm, 1/4", 3/8", 1/2"
zui大運行速度：3.000轉/分鐘
連接類型：電纜，圓形車削螺紋連接器系統(tǒng)
防護等級：IP67
化工儀器網