This is a motor-operated valve diagnostic device combining state-of-the-art sensor technology (built-in torque sensor) and computer technology.

MOVDAS can determine the statuses of degradation and any malfunction of the drive section and valves, as well as manage the tendency of motor-operated valves in a comprehensive manner, by analyzing the temporal variation in torque waveforms and variations in torque.

• Drive unit
  1. Predetermined required drive torque (calculated from the actual torque)
  2. Looseness of locknut
  3. Deterioration of transmission mechanism
  4. Abrasion of stem nut
• Valve
  5. Backseat force
  6. Bending of valve shaft
  7. Breakage of valve shaft
  8. Abrasion of valve suspender
  9. Getting caught in valve body
  10. Valve body closing force
• Gland packing
  11. Tightening force
• Protective equipment
  12. Limit switch setting
  13. Torque switch setting
  14. Brake condition
• Basic parameters
  15. Performance margin of design standard
  16. open/close time
  17. Valve stroke