MOOG G631-3013B

MOOG G631-3013B is a high-performance two-stage electro-hydraulic flow control servo valve, ideal for precision electro-hydraulic position, speed, pressure, and force control in industrial automation systems. MOOG G631-3013B features a double-nozzle flapper pilot stage with a dry torque motor and a closed-center four-way spool output stage, delivering 5 L/min rated flow at 35 bar pressure drop for precise actuation control.

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Description

MOOG G631-3013B is a high-performance two-stage electro-hydraulic flow control servo valve, ideal for precision electro-hydraulic position, speed, pressure, and force control in industrial automation systems. MOOG G631-3013B features a double-nozzle flapper pilot stage with a dry torque motor and a closed-center four-way spool output stage, delivering 5 L/min rated flow at 35 bar pressure drop for precise actuation control. MOOG G631-3013B integrates mechanical spool position feedback via a cantilever spring, ensuring consistent response and low hysteresis in demanding applications like metal forming and power generation turbine control. Its rugged, ISO 4401-05-05-0-94 compliant design enables seamless integration with standard hydraulic systems, while its dry torque motor eliminates contamination risks in the air gapMoog GmbH. Whether deployed in injection molding machines or test rigs, MOOG G631-3013B delivers fast dynamic response and reliable long-life operation to optimize process efficiency.

Technical Parameters MOOG G631-3013B

Parameter Item Parameter Value
Product Model MOOG G631-3013B (H05JOFM4VBQ)
Product Type 2-stage electro-hydraulic flow control servo valve
Rated Flow 5 L/min (1.3 gpm) at 35 bar (500 psi) valve drop
Max Operating Pressure 315 bar (4568 psi)
Pilot Stage Symmetrical double-nozzle flapper, dry torque motor
Output Stage Closed-center four-way sliding spool
Feedback Mechanism Cantilever spring mechanical feedback
Control Signal ±15 mA, ±50 mA
Operating Temperature -29°C to +135°C
Installation Pattern ISO 4401-05-05-0-94
Weight 1.8 kg
Core Application Electro-hydraulic position, speed, pressure/force control

Advantages and Features MOOG G631-3013B

  1. High Dynamic Response: MOOG G631-3013B achieves 10–15 ms step response at 210 bar, enabling precise, fast actuation for high-speed manufacturing lines.
  2. Dry Torque Motor Design: Eliminates contamination in the air gap, reducing downtime and extending service life in harsh industrial environmentsMoog Inc..
  3. Mechanical Position Feedback: Cantilever spring ensures consistent spool positioning, minimizing hysteresis (<3%) and drift for stable process control.
  4. ISO Standard Compatibility: Direct integration with standard hydraulic systems without adapter plates, cutting installation time and costMoog GmbH.
  5. Failsafe Positioning: Returns to a safe state on signal loss, enhancing operational safety in critical applications like power generationMoog GmbH.

Application Cases

  1. Automotive Stamping Press Control: A European automotive plant used MOOG G631-3013B to control stamping press slide positioning. Its fast response reduced cycle time by 12% and improved part accuracy by 18%.
  2. Thermal Power Plant Turbine Governor: A 500MW power plant integrated MOOG G631-3013B into its turbine speed control system. The valve’s precision stabilized turbine speed, cutting fuel consumption by 6% and extending maintenance intervals by 20%.
  3. Plastic Injection Molding: A packaging manufacturer deployed MOOG G631-3013B for mold clamping force control. It reduced material waste by 10% and increased production yield by 15% via consistent pressure regulation.

Competitor Comparison

Comparison Item MOOG G631-3013B Bosch Rexroth 4WREE6W Parker D1FPE50MA9NB00
Rated Flow 5 L/min at 35 bar 6 L/min at 35 bar 5.5 L/min at 35 bar
Step Response 10–15 ms 18–22 ms 15–20 ms
Feedback Type Mechanical (cantilever spring) Electro – mechanical Electro – mechanical
Max Pressure 315 bar 315 bar 280 bar
Torque Motor Dry (contamination – free) Wet Wet
Estimated Price (USD) ~$4,200 ~$3,800 ~$3,500

Selection Suggestions

  1. Choose MOOG G631-3013B for applications needing 5 L/min flow with fast step response (10–15 ms) and dry torque motor reliability.
  2. Opt for MOOG G631-3013B in industries like automotive stamping or power generation where mechanical feedback and failsafe positioning are criticalMoog GmbH.
  3. Select MOOG G631-3013B if your system uses ISO 4401-05 mounting and requires seamless integration with standard hydraulic setupsMoog GmbH.
  4. Use MOOG G631-3013B to upgrade legacy servo valves for better contamination resistance and longer service lifeMoog Inc..

Precautions

  1. Ensure hydraulic fluid cleanliness (β10 ≥75) to prevent damage to MOOG G631-3013B’s nozzle flapper and spool valve.
  2. Calibrate control signals (±15 mA/±50 mA) to match the valve’s input range for optimal performance.
  3. Follow MOOG’s installation guidelines for torque motor wiring and hydraulic port connections to avoid leaks or signal interference.
  4. Conduct regular maintenance checks on the mechanical feedback spring to ensure consistent spool positioning and response accuracy.

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