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Quarter turn & Part turn
Most valves operated for rotary motion were not constructed with seamless automation in mind but were designed to be operated by hand, either with a Hand-lever or a hand-wheel.  Peak torques which are found in the end positions or which are arise through the valve’s age, hardening of seals or construction anomalies were thought to be overcome by the operator’s muscle strength. A DC motor increases its own torque automatically should a peak torque be encountered and is therefore ideally suited to the automation of valves.  Advantages of DC motors compared to AC motors

  • Torque performance is ideal for valves
  • Compact construction
  • Easy to implement in electrical systems
  • Low heat buildup
  • Low electricity consumption