Moog Servo Valve with G1/2 Inlet Port Size and Threaded or Flanged Inlet for 5

Product Specification

D633K2009B D633K2010B
D633K2011B D633K2012B
D633K2013B D633K2014B
D633K2015B D633K2017B
D633K2018B D633K2019B MOOG Industrial Electro Hydraulic Servo Valve Hydraulic Flow Valve

FAQ:

 What are the main advantages of MOOG Servo Valves?

MOOG servo valves are known for several key advantages :

• High-Precision Control: They offer exceptional control accuracy, which can reach about 0.1%, suitable for demanding applications.

• High Dynamic Performance: They feature fast response times, often in the millisecond range, allowing for high-speed and high-precision control.

• High Reliability and Stability: Designed with advanced technology and materials for stable long-term operation, even in harsh environments.

• Variety of Designs: Available in various series, including standard two-stage, high-performance two-stage and three-stage, and direct-drive valves (DDV) to meet different performance needs.

• Fail-Safe Functionality: Some models include a fail-safe feature that moves the valve to a safe position in case of a power failure or system fault .

Series and Specifications

3. What are the main series of MOOG Servo Valves?

MOOG offers a comprehensive range of servo valves. Some prominent series include :

• G761 Series: A popular two-stage flow control valve with mechanical feedback. Known for fast response and robustness, it is widely used in various industrial applications .

• D630 Series (e.g., D634, D636, D637): These often feature direct drive by a linear force motor (DDV) or advanced control. The D636/D637 series, for example, comes with a fieldbus interface and integrated digital electronics for high flexibility .

• D660, D661, D662 Series: Classic two-stage servo valves with a wide range of industrial uses .

• 72 Series: Standard response two-stage valves with a field-replaceable pilot valve filter and the option for external pilot pressure control .

The table below summarizes the key features of some common series:

Series Example    Key Characteristics    Typical Applications / Features
G761-3003B     Two-stage, mechanical feedback, high response    Industrial machinery (e.g., metal forming presses)
D634-341C     Pilot-operated, closed-loop spool control with LVDT    Precision control systems
D636/D637     Direct Drive (DDV), linear force motor, fieldbus interface    No pilot leakage, high dynamics, programmable
72 Series     Standard response, replaceable pilot filter    Power generation (steam/gas turbines)

4. What are the typical operating parameters for MOOG Servo Valves?

While specifications vary by model, general operating parameters can include :

• Maximum Operating Pressure: Up to 4000-4500 psi (approx. 31.5 MPa) for many models.

• Flow Control Range: From a few liters/minute (e.g., 3.8 L/min) to very high flows (e.g., 3800 L/min), depending on the valve size and type .

• Input Signal: Typically a current signal (e.g., ±40 mA) or a voltage signal. Modern valves may accept digital fieldbus commands .

• Coil Resistance: Typically, each coil in the torque motor has a specific resistance, for example, in the range of 72-88 Ω .

• Operating Temperature: A common range is -20°C to 80°C .

Applications, Troubleshooting, and Maintenance

5. Where are MOOG Servo Valves commonly used?

MOOG servo valves are used in a wide array of industries that require precise motion control :

• Industrial Machinery: Metal forming equipment (press brakes, shears, injection molding machines), wood presses, and plastic machinery.

• Power Generation: Control of steam turbine valves, gas turbine fuel systems, and guide vane control.

• Test and Simulation: Automotive and aerospace test rigs, flight simulators.

• Other Fields: Robotics, material handling, and other applications demanding high-performance hydraulic control.