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How Burks Pumps Turbine Pumps Work

  • Clearance between the impeller and raceway is pre-set at the factory on production test. the pump starts under virtually no load, the impeller takes up its load gradually as the motor comes up to speed.
  • Water enters the pump through a suction port in the raceway and is directed to the rotating impeller by means of channels in the raceway.
  • The water is picked up by the blades of the rotating impeller and is literally pushed in a spiraling motion through the raceway channel.
  • Each impeller blade imparts additional energy to the water as it is propelled to the raceway cut-off.
  • The energized fluid is then discharged through the raceway by means of a cut-off or water block which is built into the raceway. the discharge is directed into a built-in vortex pocket in the raceway which separates air from the fluid being pumped.
  • The adjusting screw is located in the bearing frame on Independent Pumps and in the shaft extension end of the motor of Close-Coupled Pumps.
  • A positive pre-load spring pressure is applied to the pump shaft bearing and in turn, is transmitted to the adjusting screw.
  • This controlled pressure eliminates bearing end play and provides a means for external adjustment of the clearance between the impeller and raceway.
  • The distinct advantage of this exclusive Burks feature is the positive means provided to establish the initial clearance between the impeller and raceway, plus providing a means for field readjustment.
  • Another advantage of this exclusive feature is that readjustment can be made without disassembling the pump or disturbing the piping.

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