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Moog D680 Series Fieldbus Interface Servo, Pilot-Operated Valve

The Moog D680 Series Proportional valve is now optionally available with a closed-loop controlled, D633 Direct Drive Valve as a pilot stage.The advantages of the new pilot stage option are a higher resistance against contamination, optimized dynamics and improved repeatibility. For more details, please refer to the updated product catalog.

  • Optimized design of valve bodies for high rated flow
  • High energy efficiency due to D633 pilot valve with low internal leakage
  • Low range of minimum pilot pressure required
  • Integrated amplifier and control electronics for high functional flexibility
  • Excellent dynamic response due to high natural frequency of pilot stage
  • Different fail-safe options available allowing the best fit to application
  • Optionally available: new pilot valve with integrated electronics and position control of the pilot valve
  • 3600 l/min
  • Max pressure 350 bar

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Flow Rate (LPM)


Maximum Working Pressure (BAR)


Minimum Operating Temperature (C)


Maximum Operating Temperature (C)


Minimum Ambient Operating Temperature


Maximum Ambient Operating Temperature




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