MOOG G761 Series Servo Valve

Moog G761 Series Servo Valve
MOOG G761 Series Servo Valve - Image 2
MOOG G761 Series Servo Valve - Image 3
MOOG G761 Series Servo Valve - Image 4

Description:

The Moog G761 Series Servo Valve is a high-performance, two-stage mechanical-feedback (MFB) electro-hydraulic valve designed for precise flow control in industrial systems. It uses a nozzle-flapper pilot stage and a sliding spool main stage, paired with a robust carbide feedback mechanism to provide exceptional accuracy, responsiveness, and durability. With its rugged construction and proven reliability, the G761 series supports demanding motion control applications such as test rigs, simulation, and high-precision industrial control.

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Advantages of the MOOG G761 Series Servo Valve

  1. Exceptional Longevity

    • Uses a carbide ball-in-hole feedback design brazed to the feedback wire. This dramatically reduces wear compared to traditional steel-ball or ball-in-slot designs.

    • Moog claims life expectancy above one billion cycles.

  2. High Precision & High Resolution

    • Two-stage design (nozzle-flapper pilot + sliding spool) gives fine control, low hysteresis, and accurate flow response.

    • Mechanical feedback keeps spool position tightly regulated.

  3. Fast Dynamic Response

    • Very quick step response times (<4–16 ms depending on version) make it suitable for high-frequency control.

    • Robust Construction

    • Rugged body options (aluminum or steel) support high pressures (up to ~350 bar).

    • Built-in disc filter helps protect the pilot stage.

  4. Flexible Installation & Operation

    • ISO 10372 mounting pattern (Size 04) ensures compatibility with common manifolds.

    • Can be mounted in any orientation.

  5. Wide Flow Range

    • Available in many rated flow options (from very low to high), which makes it versatile for different applications.

Parameter Specification / Detail
Valve Type 2-stage, mechanical-feedback (MFB) servo valve
Series / Model G761 Series
Rated Flow Range 0.5 – 75 L/min (≈ 0.125 – 20 gpm)
Typical Rated Flow Options 4, 10, 19, 38, 63 L/min
Maximum Operating Pressure – Ports P, A, B, X: Aluminum body up to ~315 bar (4,500 psi), Steel body up to ~350 bar (5,000 psi) – Port T (tank): Normal operating ~70 bar
Dynamic Response 100% step response typically < 4 to < 16 ms (depending on version)
Electrical Control – Rated signal: 8 to 200 mA (single coil)  – Dry torque motor driving nozzle-flapper pilot stage
Feedback Mechanism Carbide ball-in-hole design brazed to feedback wire for long life
Mounting ISO 10372 Size 04 (04-04-0-92)
Leakage (Typical) 1.0 – ~2.8 L/min depending on model / spool land
Null Adjust Authority Up to 75% (depending on configuration)
Installation / Operating Temperature – Ambient: –29°C to +135°C typical (depending on option) – Storage: –40°C to +60°C
Vibration / Shock 30 g, 3‑axis (10 Hz–2 kHz), Shock: 30 g, 3-axis
Materials Aluminum or steel body; hardened spool; carbide feedback ball for durability
Filter Field-replaceable first-stage disc filter available
Applications Position / velocity / force / pressure control in industrial, test, simulation systems
Lifecycle / Durability Designed for very long service life (Moog targets > 1 billion cycles) using its ball-in-hole, brazed feedback design