Variable Speed Drives transmit the power by a modulated clutch mounted in a housing acting as support and oil sump.

Features (depending on model)
  • Use of standard and cheap squirrel cage motors
  • Control can be manual, pneumatic or electrical and can give speed regulation controlled by parameters varying with the driving speed such as pressure, flow, liquid level, etc
  • Direct, instantaneous response and accurate regulation
  • Starting-up a motor under no-load conditions and progressive acceleration of the driven machine in conjunction with application requirements
  • Silent operation even at high speed
  • No monitoring, no special maintenance requiring skilled labour
  • High efficiency
  • Low investment cost
  • No generation of harmonics and interference in the power supply network
  • On existing installations, no requirement to change the motor nor the pump


Drinking water and irrigation plants, pumps, fans, compressors