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{"title":"Moog Servo Valve Electro-Hydraulic Servo Valve with 5.5 kg - 27 kg Weight 0.1 kW","imgUrl":"https:\/\/img.chinax.com\/nimg\/3c\/bf\/7924177fdbd7b891444770b8cd69-200x200-1\/moog_servo_valve_electro_hydraulic_servo_valve_with_5_5_kg_27_kg_weight_0_1_kw.jpg","attrs":{"Brand Name":"MOOG","Model Number":"D635-671E D634-524A D691Z2086G D662-4002 D661-4010 D661-5626C D661-5628C D792-5012 D663-4008 B97069-061","Certifiion":"ISO","Place of Origin":"Germany"}}
{"title":"Moog Servo Valve with 3 Speed Settings 280 bar Pressure Rating and 24V 220V","imgUrl":"https:\/\/img.chinax.com\/nimg\/d2\/7d\/f3eda2d0981fc25c95d297b6b3e7-200x200-1\/moog_servo_valve_with_3_speed_settings_280_bar_pressure_rating_and_24v_220v_voltage_for_electro_hydraulic_control.jpg","attrs":{"Brand Name":"MOOG","Model Number":"743f002B G122-824-002 G122-829-001 G423-604-L25 G413-604A C08428-001 D661-5009 631F751F D122-034-017 743f003a","Certifiion":"ISO","Place of Origin":"German"}}
{"title":"Moog Servo Valve with 6-250m3 Drive Mode 3 Speed Settings and 25cm Nominal","imgUrl":"https:\/\/img.chinax.com\/nimg\/7a\/42\/3878b91428995093e193b3fb1725-200x200-1\/moog_servo_valve_with_6_250m3_drive_mode_3_speed_settings_and_25cm_nominal_diameter_for_electro_hydraulic_control.jpg","attrs":{"Brand Name":"MOOG","Model Number":"D633-495B D662-4356K D765-1089-5 D791-5045 D661-4033 CZ1006C3A D136-001-008 D137-001-011 D128-011-BA006 D791-5009","Certifiion":"ISO","Place of Origin":"Germany"}}
{"title":"Moog Servo Valve with Internal Meshing Principle and Online Video After Service","imgUrl":"https:\/\/img.chinax.com\/nimg\/d5\/f8\/94c6695c5edd5cda2a22cb5b5aec-200x200-1\/moog_servo_valve_with_internal_meshing_principle_and_online_video_after_service_for_1800_rpm_maximum_speed.jpg","attrs":{"Brand Name":"MOOG","Model Number":"D635-371E D691-087D D691-072D G761-3008 G761-3009-4 G761-3009 AC4598-24 D662-4087 D061-8311 d661-4444c","Certifiion":"ISO","Place of Origin":"Germany"}}
{"title":"Moog Servo Valve Electro-Hydraulic Servo Valve with 290*180mm Size Up to 1000 cc","imgUrl":"https:\/\/img.chinax.com\/nimg\/9b\/db\/453db3b5c493145dd9358c4b6e29-200x200-1\/moog_servo_valve_electro_hydraulic_servo_valve_with_290_2a180mm_size_up_to_1000_cc_2frev_displacement_and_pressure_compensated_con.jpg","attrs":{"Brand Name":"MOOG","Model Number":"D061-8312 N122-001 D634-1035 D641-230 122-105 D631-294","Certifiion":"ISO","Place of Origin":"Germany"}}
{"title":"Moog Servo Valve Electro-Hydraulic Proportional Flow Control Valve with 25cm","imgUrl":"https:\/\/img.chinax.com\/nimg\/7e\/00\/b01c474ca71e6d6844c32e6b0d34-200x200-1\/moog_servo_valve_electro_hydraulic_proportional_flow_control_valve_with_25cm_nominal_diameter_low_noise_less_than_70_db_28a_29_and.jpg","attrs":{"Brand Name":"MOOG","Model Number":"J761-003\/S63JOGA4VPL D662-4015-D02HABF6VSX2B D691-2705D-Q60FTATCNEC2N D633-419AR16KO1AONSP2 D791-4007S25JQS6VSX2-B","Certifiion":"ISO","Place of Origin":"Germany"}}
{"title":"Moog Servo Valve with Radial Shaft Seal Mechanically Driven Pump and Cast Iron","imgUrl":"https:\/\/img.chinax.com\/nimg\/c1\/e4\/cbd8a4ce9cbfe75f4d004bb13dc3-200x200-1\/moog_servo_valve_with_radial_shaft_seal_mechanically_driven_pump_and_cast_iron_material_for_electro_hydraulic_proportional_control.jpg","attrs":{"Brand Name":"MOOG","Model Number":"D765-1089-4\/S63JOGAEVSXO D061-8412\/D663-4007J15HOBB4VB D661-G23\/JOAA6VSX2HA 072-559A\/S15FDFAVBL D663-4006\/L03HXBD6NSM2-0","Certifiion":"ISO","Place of Origin":"Germany"}}
MOOG Construction Machinery Hydraulic System Control Flow Valve
Product Models
D635-671E
D634-524A
D691Z2086G
D662-4002
D661-4010
D661-5626C
D661-5628C
D792-5012
D663-4008
B97069-061
Technical Specifiions
Parameter
Value
Parameter
Value
Rated Current
1A
Voltage
24V/220V
Power
0.1 kW
Brand
MOOG
Rated Frequency
50 Hz
Place of Origin
Germany
Appliion
LED touch control
Material
PVC, Steel, Copper
Type
Servo proportional valve
Control
Electro hydraulic/Proportional
Compatible Models
D633-7213/A02KA4F0VAY
D633-7235
D633-7369
D633-7375/A02KO4F0HNY
D633-D2500B RXXKX1FONSS2
D633-D2501B R04KD1MONSM2
D633K2025
D633-R04KO1MOVSS2
D633Z371B
D634-301C/R40KO2M0NSM2
D634-319C
D634-319C R40KO2M0NSP2
D634-341C
D634-341C D634-319C
D634-341C R40K02M0NSS2
D634-341C R40KO2M0NSS2
D634-383C R24K02MONSX2
D634-501A
D634-520A
D634-528A R40KO2F0NSX2
D634-538A
D634Z1022
D635-124E
D635-671E
D635-671E D635-671E
D635Z681
D638-216-0001 R08UB1F0VSE2MBDK1B1
D656-430D-4 P20KBEAANDA0N
D661-/G35JOAA4VSM2HA
D661-/G75HOC04NSD2HA
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 P80HDAAFNVB0
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
D661-212D
D661-213C
D661-214D
D661-220A
D661-246A
D661-2503/H30KOGMJNSF2
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
D661-369D
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
D661-4033 1156-421 P80HAAF6VSX2-A
D661-4033 P80HAAF6VSX2-A
D661-4034
D661-4035
D661-4036
D661-4038
D661-4039
D661-4040
D661-4041
D661-4042
D661-4043
D661-4044
D661-4045B
D661-4045B/P80HXBF4NSD2-B
D661-4046
D661-4049
D661-4050
D661-4051
D661-4053
D661-4054
D661-4055
D661-4056B
D661-4057
D661-4058
D661-4059
D661-4059 1156-411 P80HAAF6VSX2-B
D661-4059 P80HAAF6VSX2-B
D661-4059/P80HABF6VSX2-B
Frequently Asked Questions
1. What is a Moog electro-hydraulic servo valve?
A Moog electro-hydraulic servo valve is a high-precision component that converts electrical signals into hydraulic power output. It controls hydraulic flow and pressure to regulate position, speed, force, or pressure in systems like industrial machinery, aerospace actuators, and turbine controls. Its design typically includes a torque motor, nozzle-flapper pilot stage, and spool valve for accurate performance.
2. What are the key features?
High precision: Control accuracy up to ~0.1%
Fast dynamic response: Responds within milliseconds
Programmability: Customizable control algorithms via embedded electronics
Robustness: Operates in harsh environments (-20°C to 80°C) and resists contamination
Fail-safe function: Automatic shutdown during power loss or failure
3. What are common failure modes?
Torque motor issues:
Coil breakage (valve fails to respond)
Armature sticking or ball head wear (causing instability)
Nozzle/flapper blockages: Clogging from oil contamination reduces response and causes system oscillation
Spool amplifier problems:
Edge wear (increases leakage and noise)
Spool sticking due to contaminated or degraded oil
Seal aging: Leads to internal/external leakage
4. How to maintain servo valves?
Oil quality management: Use recommended fluids (e.g., phosphate ester fire-resistant oil) and maintain cleanliness per NAS 1638 Class 5 standards. Regularly check acidity and resistivity
Routine inspections: Test for electrical issues (e.g., coil resistance), clean filters, and check for loose components
Pre-startup checks: Ensure oil circulation before powering the valve to prevent clogging
5. How to troubleshoot unstable operation (e.g., cylinder drift or oscillation)?
Check servo valve resolution and zero zone stability
Inspect for internal leakage or spool wear
Verify control system parameters and calibrate zero bias if needed
6. What if the valve doesn't move?
Confirm electrical signals and coil connectivity
Check for spool sticking caused by debris in oil
Ensure correct startup sequence: oil flow before electrical power
7. Can Moog servo valves be customized?
Yes. Models like the D636/D637 series support fieldbus interfaces and programmable electronics for appliion-specific tuning.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Total Annual:
1 million-10 millon
Employee Number:
>50
Ecer Certification：
Verified Supplier
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha... Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha...
