MOOG®
G771K & G772K
Servo Valves
High-performance electrohydraulic servo valves for precise flow, position, speed, pressure and force control.
High Precision Control
Accurate control of flow, position, speed and pressure.
Fast Dynamic Response
Designed for demanding industrial applications.
Reliable Performance
Proven MOOG quality and durable design.
Wide Applications
Used in hydraulic machinery, test equipment and power generation.
PRODUCT OVERVIEW
MOOG G771K & G772K Servo Valve Series
MOOG G771K and G772K servo valves are high-performance electrohydraulic flow control valves designed for demanding industrial applications. They are part of MOOG’s mechanical feedback servo valve family, using a two-stage design to provide precise and responsive hydraulic control.
The G771 and G772 series are widely used in systems requiring accurate control of position, speed, pressure or force. With different configurations and flow options, these valves can meet various industrial requirements.
Wuhan Yuli Automation supplies MOOG servo valves and provides model identification, legacy model cross-reference and replacement support for G771K and G772K series products.
MOOG G771K Servo Valves
The MOOG G771K Series is part of the G771 servo valve family and is designed for high-performance electrohydraulic control applications. The G771 uses the Size 02 mounting pattern, making it suitable for compact precision hydraulic systems.
MOOG G772K Servo Valves
The MOOG G772K Series belongs to the G772 servo valve family and is designed for demanding electrohydraulic applications requiring precise and dynamic flow control. The G772 uses the Size 03 mounting pattern.
MOOG G771K Servo Valve Models
| Current Model | Legacy / Replacement Reference | View |
|---|---|---|
| G771K289A | G771K200A / G771K240A | View Product |
| G771K287A | G771K201A / G771K241A | View Product |
| G771K293A | G771K202A / G771K242A | View Product |
| G771K291A | G771K203A | View Product |
| G771K294A | G771K208A / G771K244A | View Product |
| G771K288A | G771K226A | View Product |
| G771K292A | G771K227A | View Product |
| G771K235A | G771K247A | View Product |
| G771K290A | G771K260A | View Product |
| G771K355A | G771K297A | View Product |
| G771K354A | G771K298A | View Product |
| G771K356A | G771K299A | View Product |
| G771K305A | G771K624A | View Product |
| G771K301A | G771K625A | View Product |
| G771K304A | G771K626A | View Product |
MOOG G772K Servo Valve Models
| Current Model | Legacy / Replacement Reference | View |
|---|---|---|
| G772K336A | G772K240A / G772K272A | View Product |
| G772K337A | G772K241A / G772K273A | View Product |
| G772K357A | G772K340A | View Product |
| G772K339A | G772K619A | View Product |
| G772K338A | G772K620A | View Product |
Applications
TECHNICAL INFORMATION
MOOG G771K & G772K Servo Valve Technical Data
| Specification | G771K Series | G772K Series |
|---|---|---|
| Valve Type | Two-stage electrohydraulic servo valve | Two-stage electrohydraulic servo valve |
| Feedback | Mechanical feedback | Mechanical feedback |
| Mounting Interface | Size 02 (ISO 10372-02-02-0-92) | Size 03 (ISO 10372-03-03-0-92) |
| Rated Flow Range* | Varies by model (part of 771/772/773 family: 1.9–57 L/min) | Varies by model (part of 771/772/773 family: 1.9–57 L/min) |
| Maximum Operating Pressure | 210 or 350 bar (varies by model) | 210 or 350 bar (varies by model) |
| Electrical Signal Range | 8–200 mA (varies by model) | 8–200 mA (varies by model) |
| Step Response | 4–17 ms (varies by model) | 4–17 ms (varies by model) |
* Flow range is for the 771/772/773 series family. Actual values depend on specific model configuration.
MOOG G771K & G772K Replacement Guide
Looking for a replacement for an older MOOG G771K or G772K servo valve?Some legacy model numbers may have newer replacement references. Because servo valve configurations can differ in flow rating, electrical characteristics, pressure rating and other options, replacement selection should be based on the complete model and application requirements.
FAQ
Frequently Asked Questions
What is a MOOG G771K servo valve?
The MOOG G771K is a two-stage electrohydraulic servo valve designed for precise control of hydraulic flow. It is used in industrial applications requiring accurate and responsive control of position, speed, pressure or force.
What is the difference between MOOG G771K and G772K?
The main difference between the MOOG G771K and G772K servo valves is the mounting interface and available flow configurations. The G771 series uses a Size 02 mounting pattern (ISO 10372-02-02-0-92), while the G772 series uses a larger Size 03 mounting pattern (ISO 10372-03-03-0-92). Both belong to MOOG’s two-stage mechanical feedback servo valve family.
What is the replacement for MOOG G771K240A?
The MOOG G771K289A is the replacement reference for the legacy G771K240A model. Because servo valve configurations may vary, the complete model number and application requirements should be confirmed before selecting a replacement.
What is the replacement for MOOG G771K202A?
The MOOG G771K293A is the replacement reference for the legacy G771K202A model. Because servo valve configurations may vary, the complete model number and application requirements should be confirmed before selecting a replacement.
Can YULI Automation supply MOOG G771K and G772K?
Yes. YULI Automation supplies MOOG G771K and G772K servo valves and can assist with model identification, legacy model cross-references and replacement inquiries. Please provide the complete model number or nameplate information so we can help confirm the appropriate product and availability.
How do I identify the correct MOOG servo valve?
Check the complete model number and other information shown on the valve nameplate. When requesting a replacement, provide the full model number, nameplate photo and application details. YULI Automation can use this information to help identify the appropriate MOOG servo valve or replacement reference.