MOOG伺服閥由永磁力矩馬達、噴嘴、檔板、閥芯、閥套和控制腔組成。當輸入線圈通入電流 伺服閥時，檔板向右移動，使右邊噴嘴的節流作用加強，流量減少，右側背壓上升；同時使左邊噴嘴節流作用減小，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。
MOOG伺服閥型號資料下載常用型號：G761-3001；G761- 
3002；G761-3003；G761-3004；G761-3005；等等型號：G761-3001-5；G761-3001B；G761-3002-5； 
G761-3002B；G761-3003-5；G761-3003B；G761-3004B；G761-3004B5；G761-3005B；G761-3005B5； 
G761-3006B；G761-3007-5；G761-3007B；G761-3008；G761-3008-5；G761-3008B；G761-3009-5； 
G761-3009B；G761-3010；G761-3010-5；G761-3016B；G761-3017；G761-3017B；G761-3018；G761- 
3018B；G761-3019；G761-3020；G761-3021；G761-3021-5；G761-3021B；G761-3022-5；G761-3022B； 
G761-3023；G761-3023-5；G761-3023B；G761-3024-5；G761-3024B；G761-3025B；G761-3500；G761- 
3501；G761-3502；G761-3503；G761-3504；G761-3504-5；G761-3511；G761-3511A；G761-3512； 
G761-3512A；G761-3513；G761-3513B；G761-3600；G761-3601；G761-3602B；G761-3605B；G761-3609 
；G761-3611B；G761-3617；G761-3620；
MOOG伺服閥型號資料下載型號:G761-001;G761-002;G761-003;G761-004;G761-005;G761-3008;G761-
3009;G761-3800:072-229A;072-558A;072A560:D634-341C;D634-319C;D634-501A;D634-514A;D634 -
524A;D634-534A;D634-543A:D661-4651;D662-4652;D661-4697C;D661-4739;D662-4010:G631-
3003B;G123-81001;N122-001;D691-2702G;D691-072D;743F002B;743F003A.G761-3008 G631-3001B；
D660,D633； D680,D765 072-559A D661-4697CG631-3003BD633-328BD634-341CD634-
319CD661,D662,,D765,D691,D791,G761,D792,D663,D664,D665,D633,D634D651-E491;D661-4059;D661-
4060;D661-4627A;D661-446C;D661-2935-6:D661-4055:D661-444C:072- 558A:D691-2137G;D634-
341C;D665-404A;D661-4651;D634-319C;D634-341C ;D665-404A;D661-4697C;D631-333C;D661-
556C;D661-571C;D661Z556C;G761-3004,G761-3003D634-319C D634-341C 77X-3002 771-3001 D661-
4789, G761-3004,G761-3003 D072-559A D072-383A G631-3005 D662 D662-4015 D691-2705D D630
D633 D791-4007； G123-81001； D792-4006 ； D662-4005； D634-319C； J761-003； J761-001
；D662Z4341K D661-4506C ；D664Z4306K D663Z4305K；D634-521P40KA2M0NSM2 ；G123-81001；
G631-3006D D635-D635Z； D691Z2086GQ80XUAAAVVS2N D631-335CF-；D791Z106AS16JPNAFU680 D630-
053AH020HB200VE；
MOOG伺服閥型號資料下載常用型號：D661；D662；D663；D664；D665等。型號：D661-011A；
D661-027C；D661-030C；D661-031A；D661-039C；D661-043D；D661-053D；D661-061D；D661-1701E；
D661-1702E；D661-1703E；D661-1704E；D661-1705E；D661-1705E-5；D661-1709E；D661-1710E；
D661-1715E-4；D661-1719F；D661-1722E-5；D661-1727E；D661-1729E；D661-1730E；D661-188D-4；
D661-188D-5；D661-1901E；D661-1906E-4；D661-1907E-4；D661-1907E-7；D661-1912E；D661-1913E
；D661-1915E-6；D661-1918E；D661-191D-5；D661-1924E；D661-1925E；D661-1926E；D661-1927E-4
；D661-192D-5；D661-1931E；D661-1932E；D661-1933E-4；D661-1933E-6；D661-1937E-4；D661-
1937E-6；D661-1940E；D661-1942E；D661-1943E；D661-1945E-4；D661-1945E-6；D661-1946E；D661
-1954E；D661-1955E；D661-1957ED661-1960E；D661-1962E；D661-1963E；D661-1964E；D661-1965E；
D661-1966E；D661-20；D661-212D；D661-213C；D661-214D；D661-220A；D661-246A；D661-312A；
D661-312A-4；D661-318B-5；D661-318D-4；D661-318D-5；D661-319D；D661-323D；D661-324D；D661
-326D；D661-344A；D661-350A；D661-351A-4；D661-351A-5；D661-353B；D661-360D；D661-364B-5；
D661-36；D661-369D；D661-371D；D661-386A；D661-393D；D661-4008；D661-4009；D661-4010；
D661-4011；D661-4012；D661-4013；D661-4014；D661-4015；D661-4019；D661-4020B；D661-4021；
D661-4022；D661-4023；D661-4024；D661-4025；D661-4026；D661-4027；D661-4028；D661-4029；
D661-4030；D661-4031；D661-4032B；D661-4033；D661-4034；D661-4035；D661-4036；D661-4038；
D661-4039；D661-4040；D661-4041；D661-4042；D661-4043；D661-4044；D661-4045B；D661-4046；
D661-4049；D661-4050；D661-4051；D661-4053；D661-4054；D661-4055；D661-4056B；D661-4057；
D661-4058；D661-4059；D661-405D；D661-405D-4；D661-4060；d661-4061；D661-4062；D661-4064；
D661-4065；D661-4066；D661-4067；D661-4068；D661-4069；D661-406D；D661-4070；D661-4071；
D661-4072；D661-4073；D661-4074；D661-4075；D661-4076；D661-4077；D661-4078；D661-4079；
D661-4080；D661-4081；D661-4082；D661-4083；D661-4084；D661-4085；D661-4086；D661-4088；
D661-4089；D661-4090；D661-4091；D661-4096；D661-4097；D661-4098E；D661-4099；D661-4101；
D661-4102；D661-4103；D661-4105；D661-4106E；D661-4107；D661-4108；D661-4109；D661-4110