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All of our Dry Pit/Bearing Frame pumps incorporate the screw centrifugal impeller, invented by Hidrostal. This hydraulic design offers considerable benefits over conventional centrifugal pumps, including:

  • Solids handling
  • Viscous pumping
  • Delicate handling
  • Low shear pumping
  • High efficiency operation

The unique characteristics of the screw impeller give a combination of characteristics not found in any other type of pump, namely:

  • Extremely steep and stable curve
  • High efficiencies
  • Non-overloading power curve
  • Low NPSH
  • Non-clog pumping

The term ""Non-Clog"" has almost become a punchline in the pumping industry. Traditional wastewater pumps are actually classified as ""Non-Clog"", but ask any operator or pump mechanic if their ""Non-Clog"" pumps clog! The Hidrostal design takes solids handling operation to the next level, where clogging & blockages are a thing of the past. The Hidrostal is not a traditional non-clog pump, but actually a hybrid that utilizes the best features of a positive displacement type screw pump - crossed with a single vane centrifugal pump. This combination provides an unmatched performance of effectiveness & efficiency.


The fact of the matter is that unscreened sewage or wastewater is evolving and most of the pump suppliers are not evolving with it, but Hidrostal is.


The Hidrostal is not your ""average pump"", it is a unique alternative that is positioned to handle today's challenging wastewater demands. The superior hydraulic design is backed by a company that is committed to improvement and technology and is not just ""doing it the we always do"". Hidrostal offers our Dry Pit/Bearing Frame pumps in multiple installation types with several power transmission options. Our configuration features the Hidrostal wet end hydraulics with a robust bearing frame design with oversized bearings.

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