Moog Servo Valve and Proportional Valve Model Reference
Moog servo valves and proportional valves are widely used in high-performance hydraulic control systems that require accurate flow control, fast response and stable machine movement. Typical applications include injection molding machines, die casting machines, metal forming presses, test benches, turbine control systems, metallurgy equipment, aerospace test equipment and industrial automation systems.
This article focuses on Moog hydraulic valve model identification and sourcing support for global buyers. It helps engineers, maintenance teams and procurement departments understand common Moog D661, D662, D633, D634 and related valve model references.
Main Moog Servo Valve and Proportional Valve Models
D634-501A
D661-4651
D661-4697C
D661-4443C
730-1242B1
D661-2304
D664-4009
D662Z4384K P01JAMF6VSX2-A
D661-4506C
D661-6623
D791-4028
D661-4594CG75KXAA5VSX2H
D633K2064
D936-R40K09F3VSX2-0
D661-4651/G35JOAA6VSX2HA with metal connector
D634-341C
D661-4539C
D662Z4334K P01JOMF6VSX2-A
D691Z2701D
D662 valve body
D662Z4334K P01JOMF6VSX2-A
D661-4577C
D661-4507C
D661-6573C
D661-4033
D661-4652
D661-4627A
D663-Z4307K
D661-4636
D661-4594C
D661-4651C
D633-313B
D634-319C
D662-4014
D662-4036
D661-4099
D661-5643
D661-5625
D661-5611
D661-5624
D661-5631
D633K2028
D634Z5109
Moog D661 Series
The Moog D661 series is one of the most common servo/proportional valve series used in industrial hydraulic control. It is often found in closed-loop position, speed and pressure control systems. When checking a D661 model, the complete model code is important because spool type, flow rating, control electronics, connector type and command signal may be different.
Moog D662 Series
The Moog D662 series is used in precision hydraulic control systems where stable dynamic response and reliable proportional control are required. For replacement selection, engineers should confirm the full nameplate code, valve body interface, electrical connector, signal type, rated flow and machine control requirements.
Moog D633 and D634 Series
Moog D633 and D634 series valves are commonly used for servo control and proportional flow control. They can appear in machine tools, test equipment, forming equipment and automation systems. Before quotation or replacement, the valve model, mounting pattern, spool function, pressure level and electrical details should be checked carefully.
Selection and Replacement Notes
Moog servo valves are precision hydraulic components. Selection should not be based on appearance only. Important information includes the complete model number, rated flow, pressure range, spool configuration, feedback type, command signal, supply voltage, connector, mounting interface, oil cleanliness requirement and original machine application.
For old machines, the same series may have different electronics or control signals. If the original valve is discontinued or difficult to source, an engineering replacement plan should compare hydraulic function, electrical signal, mounting interface and control accuracy before installation.
Typical Applications
Moog servo and proportional valves are used in plastic injection molding machines, die casting machines, hydraulic presses, rolling mills, turbine control, aerospace testing, simulation platforms, marine equipment, industrial robots, fatigue testing machines and other hydraulic systems that require accurate motion control.
Quotation Information Required
For faster model confirmation and quotation, please provide the complete Moog model number, nameplate photo, quantity, machine type, voltage, command signal, pressure and flow requirements, connector style and whether the request is for original supply, repair support, compatible replacement or hydraulic system upgrade.
YUYOU Hydraulics Support
YUYOU Hydraulics supports international buyers with Moog servo valve model identification, proportional valve sourcing discussion, hydraulic power unit matching, valve block design, pump and cylinder selection and hydraulic system upgrade projects. Our focus is clear model checking, practical engineering support, reliable quality control and long-term service for industrial equipment.
Website: https://www.hyxon-fluid.com
Disclaimer: Moog brand names and model numbers are used only for product identification and technical reference. Final supply status, origin, interchangeability, price and delivery time must be confirmed according to a formal quotation.
