穆格伺服閥D660系列采用新型的Servo Jet先導(dǎo)級，改善了整閥的動態(tài)特性。大流量閥內(nèi)流道設(shè)計，大幅度增大了閥的額定流量。

穆格伺服閥D660系列采用新型的Servo Jet先導(dǎo)級，改善了整閥的動態(tài)特性。大流量閥內(nèi)流道設(shè)計，大幅度增大了閥的額定流量。主閥芯位置采 用位移傳感器進行電反饋，內(nèi)置式電子放大器對閥芯位移進行閉環(huán) 控制。故障保險（Fail-Safe）功能可保障在出現(xiàn)意外斷電故障時機器設(shè)備處于安全位置。常用型號：D661；D662；D663；D664；D665等。
美國MOOG伺服閥型號：
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
D661-1957E
D661-1960E
D661-1962E
D661-1963E
D661-1964E
D661-1965E
D661-1966E
D661-205A
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
D661-365A
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
D661-4111E
D661-4112
D661-4113
D661-4114
D661-4115
D661-4116E
D661-4117E
D661-4118E
D661-4119E
D661-411A  穆格（上海）
D661-4120
D661-4121E
D661-4122E
D661-4123E
D661-4124E
D661-4125E
D661-4126E
D661-4127
D661-4128
D661-4129
D661-4130
D661-4131
D661-4132
D661-4133
D661-4134
D661-4136B
D661-4137
D661-4142
D661-4144
D661-4145E
D661-4147
D661-4148
D661-4149
D661-4150
D661-4151B
D661-4152B
D661-4154
D661-4155B
D661-4156
D661-4157B
D661-4158B
D661-4159
D661-4160
D661-4165
D661-4166
D661-4167B
D661-4168
D661-4169
D661-416D
D661-4170
D661-4172
D661-4173
D661-4174
D661-4175
D661-4177
D661-4178
D661-4179B
D661-4180
D661-4181
D661-4182
D661-4183
D661-4184
D661-4185
D661-4186
D661-4187
D661-4188
D661-4189
D661-4190
D661-4191
D661-421D
D661-422D
D661-4300E
D661-4302E
D661-4303E
D661-4304C
D661-4305E
D661-4306C
D661-4307C
D661-4308G
D661-4309C
D661-4310C
D661-4311C
D661-4312C
D661-4313C
D661-4315C
D661-4316E
D661-4317C
D661-4318E
D661-4319E
D661-431D-4
D661-431D-5
D661-4320E
D661-4321C
D661-4322E
D661-4323C
D661-4324C
D661-4325C
D661-4326C
D661-4327C
D661-4328C
D661-4329C
D661-4330C
D661-4331C
D661-4332C
D661-4333C
D661-4334C
D661-4335E
D661-4336C
D661-4337E
D661-4338E
D661-4339C
D661-4340C
D661-4341C
D661-4342C
D661-4343E
D661-4344C
D661-4345C
D661-4346E
D661-4347C
D661-4348C
D661-4349C
D661-4352C
D661-4353C
D661-4354C
D661-4355C
D661-4356C
D661-4357C
D661-4358C
D661-4360E
D661-4361E
D661-4362E
D661-4363C
D661-4364C
D661-4365C
D661-4366C
D661-4367C
D661-4368C
D661-4369E
D661-4370E
D661-4371E
D661-4372E
D661-4373C
D661-4374C
D661-4375B
D661-4376E
D661-4377E
D661-4378E
D661-4380E
D661-4382C
D661-4383E
D661-4384C
D661-4385C
D661-4386C
D661-4387C
D661-4388E
D661-4389E
D661-4390E
D661-4391E
D661-4392E
D661-4394C
D661-4395E
D661-4396E
D661-4397E
D661-4398E
D661-4399E
D661-4401C
D661-4402C
D661-4405C
D661-4406C
D661-4407C
D661-4408E
D661-4409E
D661-4410C
D661-4411E
D661-4412C
D661-4413C
D661-4414C
D661-4415C
D661-4416C
D661-4417C
D661-4419C
D661-4420C
D661-4421C
D661-4422C
D661-4423C
D661-4425E
D661-4426E
D661-4427C
D661-4428C
D661-4429E
D661-4430C
D661-4431D
D661-4432C
D661-4433C
D661-4434C
D661-4436C
D661-4437D
D661-4438E
D661-4439C
D661-4440E
D661-4441E
D661-4442E
D661-4443C
D661-4444C
D661-4445D
D661-4446C
D661-4446E
D661-4447C
D661-4448E
D661-4449C
D661-4450C
D661-4451C
D661-4452C
D661-4453C
D661-4454E
D661-4455E
D661-4456C
D661-4457C
D661-4462C
D661-4463E
D661-4464E
D661-4465E
D661-4467E
D661-4468
D661-4469C
D661-4470E
D661-4472C
D661-4473E
D661-4474C
D661-4475C
D661-4476E
D661-4477C
D661-4478C
D661-4479C
D661-4480E
D661-4481C
D661-4482C
D661-4483E
D661-4484C
D661-4485C
D661-4486B
D661-4487C
D661-4488C
D661-4489E
D661-4490E
D661-4491E
D661-4492E
D661-4493E
D661-4494C
D661-4495E
D661-4496E
D661-4497C
D661-4498C
D661-4499C
D661-4501
D661-4502C
D661-4503C
D661-4504
D661-4505C
D661-4506C
D661-4507C
D661-4509C
D661-450D-4
D661-450D-5
D661-4510C
D661-4511C
D661-4512C
D661-4513C
D661-4515C
D661-4518E
D661-4519C
D661-4520C
D661-4521C
D661-4522C
D661-4524C
D661-4526C
D661-4527C
D661-4533C
D661-4534C
D661-4535C
D661-4536C
D661-4537C
D661-4538C
D661-4539C
D661-4542C
D661-4546C
D661-4547E
D661-4548C
D661-4549C
D661-4550C
D661-4551C
D661-4553E
D661-4554C
D661-4555E
D661-4556E
D661-4557E
D661-4558E
D661-4559C
D661-4560C
D661-4561C
D661-4562C
D661-4563E
D661-4564E
D661-4565C
D661-4566C
D661-4569C
D661-4570E
D661-4573C
D661-4574C
D661-4575C
D661-4576C
D661-4577C
D661-4578C
D661-4579C
D661-457D
D661-4580D
D661-4581D
D661-4582C
D661-4584C
D661-4585C
D661-4586E
D661-4587D
D661-4588C
D661-4589E
D661-4590C
D661-4591E
D661-4592C
D661-4593C
D661-4594C
D661-4595E
D661-4596C
D661-4597E
D661-4598C
D661-4602
D661-4604A
D661-4610
D661-4611A
D661-4612
D661-4613
D661-4614A
D661-4616
D661-4617
D661-4618
D661-4619
D661-4620
D661-4622
D661-4623A
D661-4624
D661-4625A
D661-4626
D661-4627A
D661-4628A
D661-4630
D661-4632
D661-4633
D661-4634
D661-4635
D661-4636
D661-4637
D661-4640
D661-4642
D661-4643
D661-4645
D661-4646A
D661-4647B
D661-4648B
D661-4649
D661-4650
D661-4651
D661-4652
D661-4653
D661-4654
D661-4655
D661-4656
D661-4657
D661-4658
D661-4661
D661-4662
D661-4663
D661-4664B
D661-4665B
D661-4667
D661-4668
D661-4669
D661-4670
D661-4673
D661-4674C
D661-4676C
D661-4677C
D661-4679C
D661-467B
D661-4680C
D661-4681C
D661-4682C
D661-4684D
D661-4685C
D661-4688C
D661-4689C
D661-4690C
D661-4691C
D661-4692C
D661-4693C
D661-4694C
D661-4695C
D661-4697C
D661-4712
D661-4713
D661-4716A
D661-4718
D661-4719
D661-4720
D661-4721
D661-4722
D661-4728
D661-4729
D661-4730
D661-4731
D661-4732
D661-4733 MOOG伺服閥
D661-4734
D661-4737
D661-4738
D661-4739
D661-4740
D661-4741
D661-4742
D661-4744
D661-4746
D661-4747
D661-4749
D661-4750
D661-4752
D661-4759
D661-4760
D661-4761
D661-4763
D661-4764
D661-4766
D661-4767B
D661-4768
D661-4769
D661-4770
D661-4771
D661-4773
D661-4775
D661-4776
D661-4778
D661-4780B
D661-4781
D661-4782
D661-4783
D661-4784
D661-4786
D661-4787
D661-4788
D661-4789
D661-478B
D661-4790
D661-4793
D661-4795
D661-4796
D661-4797
D661-4798
D661-4799
D661-4800
D661-4801
D661-4802
D661-4803
D661-4804
D661-4805B
D661-4806
D661-4807
D661-4809
D661-4811
D661-4812
D661-4813
D661-4820
D661-4821
D661-4822B
D661-4826
D661-4827
D661-4829B
D661-482D
D661-4830
D661-4831
D661-4833
D661-4836
D661-4837
D661-4839
D661-4840
D661-4841
D661-4842
D661-4843
D661-4844
D661-4846
D661-4847B
D661-4849
D661-4850
D661-4851
D661-4852
D661-4853
D661-4854
D661-4855B
D661-4857
D661-4858
D661-4859
D661-4860
D661-4861B
D661-4862
D661-4863
D661-4865
D661-4866
D661-4867
D661-4869
D661-4870
D661-4871
D661-4874
D661-4875
D661-4876
D661-4878
D661-4880
D661-4881
D661-4882
D661-4885
D661-4886
D661-4887
D661-4888
D661-4889
D661-4890
D661-4891
D661-4892
D661-4894B
D661-4895
D661-4896
D661-4897
D661-4898
D661-4899
D661-4900
D661-4901
D661-4902
D661-4903
D661-4904B
D661-4909
D661-490D
D661-4910
D661-4912
D661-4913
D661-4914
D661-4918
D661-4919
D661-491B
D661-4920
D661-4922
D661-4923
D661-4924
D661-4926
D661-4927
D661-4929
D661-4930
D661-4931
D661-4932E
D661-4933
D661-4935
D661-4937
D661-493D
D661-494B
D661-5001
D661-5002
D661-5003
D661-5004
D661-5005
D661-5006
D661-5007
D661-5009
D661-5010
D661-5011
D661-5013
D661-5014
D661-5015
D661-5016
D661-5017
D661-5018
D661-5019
D661-5020
D661-5021
D661-5022
D661-5023
D661-5024
D661-5025
D661-5026
D661-5027
D661-5028
D661-5029
D661-5030
D661-5031
D661-5032
D661-5033
D661-5034
D661-5035
D661-5036
D661-5037
D661-5038
D661-5039
D661-5040
D661-5041
D661-5042
D661-5043
D661-5044
D661-5045
D661-5046
D661-5047
D661-5048
D661-5049
D661-5050
D661-5051
D661-5052
D661-5053
D661-5054
D661-5055
D661-5056
D661-5057
D661-5058
D661-5059
D661-5060
D661-5061
D661-5062
D661-5063
D661-5064
D661-5065
D661-5066
D661-5067
D661-5068
D661-5070
D661-5071
D661-5072
D661-5073
D661-5074
D661-5075
D661-5076
D661-5077
D661-5078
D661-5079
D661-5080
D661-5081
D661-5082
D661-508D
D661-511D
D661-515D
D661-515D-6
D661-516D
D661-5205
D661-5208
D661-5209
D661-5212
D661-521D-5
D661-521D-6
D661-5236
D661-5238
D661-5239
D661-5240
D661-5241
D661-5302C
D661-533D
D661-548D
D661-5527C
D661-5528C
D661-5529C
D661-5530C
D661-5531C
D661-5533C
D661-555D
D661-558D
D661-5605
D661-5606
D661-5607
D661-5608
D661-5609
D661-5610
D661-5611
D661-5612
D661-5613
D661-5614
D661-5615
D661-5617
D661-5618
D661-5619
D661-5620C
D661-5621
D661-5623C
D661-5624C
D661-5625C
D661-5626C
D661-5628C
D661-5629C
D661-5630C
D661-5631C
D661-5632C
D661-5633C
D661-5634C
D661-5635C
D661-5636C
D661-5637C
D661-5638C
D661-5639C
D661-5640C
D661-5641C
D661-5642C
D661-5643C
D661-5644C
D661-5645C
D661-5646C
D661-5647C
D661-5648C
D661-5649C
D661-5650C
D661-5651C
D661-5652C
D661-5653C
D661-565A
D661-5682C
D661-5684C
D661-5685C
D661-5686C
D661-5688C
D661-5689C
D661-5690C
D661-5691C
D661-5692C
D661-5693C
D661-5694
D661-5695C
D661-5696C
D661-5697C
D661-5698C
D661-5699C
D661-569C
D661-5701
D661-5702
D661-5704
D661-5706
D661-5707
D661-5708
D661-5709
D661-5710
D661-5711
D661-5712
D661-5718
D661-5726
D661-5727
D661-5729
D661-5730
D661-5731
D661-5736
D661-5737
D661-5738
D661-5739
D661-5740
D661-5741
D661-5742
D661-574D
D661-5751
D661-5752
D661-5753
D661-5754
D661-5755
D661-5756
D661-5757
D661-5758
D661-5759
D661-5760
D661-5762
D661-583D
D661-584D
D661-585D
D661-586D
D661-588D
D661-589D
D661-590D
D661-591D
D661-592D
D661-6301
D661-6302E
D661-6303C
D661-6304C
D661-6305C
D661-6306E
D661-6307E
D661-6308E
D661-6309E
D661-6310E
D661-6311C
D661-6312C
D661-6313C
D661-6314E
D661-6315C
D661-6316C
D661-6317C
D661-6318E
D661-6319C
D661-6320C
D661-6321
D661-6322
D661-6323
D661-6324
D661-6325E
D661-6326
D661-6327
D661-6328
D661-6329
D661-6330
D661-6331C
D661-6332C
D661-6333
D661-6334
D661-6335
D661-6336
D661-6338
D661-6339
D661-6340E
D661-6341E
D661-6342
D661-6343
D661-6344E
D661-6345C
D661-6346C
D661-6347C
D661-6348E
D661-6349C
D661-6350C
D661-6351C
D661-6352E
D661-6353E
D661-6354C
D661-6355E
D661-6356
D661-6357C
D661-6358C
D661-6362C
D661-6363C
D661-673B
D661-673G
D661-686D
D661E643B
D661K4094
D661K4100
D661K4104
D661K4135
D661K4138
D661K4139
D661K4143
D661K4808
D661K4814
D661K4816
D661K4825
D661K4835
D661K4868
D661K4883
D661K4884
D661K4893
D661K4915
D661K4916
D661K4917
D661K4928
D661K4934
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MOOG伺服閥的對流量的控制可以分為兩種：一種是開關(guān)控制：要么全開、要么全關(guān)，流量要么zui大、要么zui小，沒有中間狀態(tài)，如普通的電磁直通閥、電磁換向閥、電液換向閥?！×硪环N是連續(xù)控制：閥口可以根據(jù)需要打開任意一個開度，由此控制通過流量的大小，這類閥有手動控制的，如節(jié)流閥，也有電控的，如比例閥、伺服閥。 所以使用比例閥或伺服閥的目的就是：以電控方式實現(xiàn)對流量的節(jié)流控制（當(dāng)然經(jīng)過結(jié)構(gòu)上的改動也可實現(xiàn)壓力控制等），既然是節(jié)流控制，就必然有能量損失，伺服閥和其它閥不同的是，它的能量損失更大一些，因為它需要一定的流量來維持前置級控制油路的工作。美國MOOG穆格伺服閥的主閥一般來說和換向閥一樣是滑閥結(jié)構(gòu)，只不過閥芯的換向不是靠電磁鐵來推動，而是靠前置級閥輸出的液壓力來推動，這一點和電液換向閥比較相似，只不過電液換向閥的前置級閥是電磁換向閥，而伺服閥的前置級閥是動態(tài)特性比較好的噴嘴擋板閥或射流管閥。也就是說，美國MOOG穆格伺服閥的主閥是靠前置級閥的輸出壓力來控制的，而前置級閥的壓力則來自于伺服閥的入口p，假如p口的壓力不足，前置級閥就不能輸出足夠的壓力來推動主閥芯動作。而我們知道，當(dāng)負載為零的時候，如果四通滑閥*打開，p口壓力＝t口壓力＋閥口壓力損失（忽略油路上的其它壓力損失），如果閥口壓力損失很小，t口壓力又為零，那么p口的壓力就不足以供給前置級閥來推動主閥芯，整個伺服閥就失效了。所以伺服閥的閥口做得偏小，即使在閥口全開的情況下，也要有一定的壓力損失，來維持前置級閥的正常工作。

   美國MOOG伺服閥其實缺點極多：能耗浪費大、容易出故障、抗污染能力差、價格昂貴等等等等，好處只有一個：動態(tài)性能是所有液壓閥中zui高的。就憑著這一個優(yōu)點，在很多對動態(tài)特性要求高的場合不得不使用伺服閥，如飛機火箭的舵機控制、汽輪機調(diào)速等等。動態(tài)要求低一點的，基本上都是比例閥的天下了。 一般說來，好像美國MOOG穆格伺服閥伺服系統(tǒng)都是閉環(huán)控制，比例多用于開環(huán)控制；其次比例閥類型要多，有比例壓力、流量控制閥等，控制比伺服要靈活一些。從他們內(nèi)部結(jié)構(gòu)看，伺服閥多是零遮蓋，比例閥則有一定的死區(qū)，控制精度要低，響應(yīng)要慢。但從發(fā)展趨勢看，特別在比例方向流量控制閥和伺服閥方面，兩者性能差別逐漸在縮小，另外比例閥的成本比伺服閥要低許多，抗污染能力也強！