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Tag Archive: WEMCO-Hidrostal

What are Prerostal Systems and How do They work?

Posted on by Sara Springer

The Prerostal and PreroClean Prerotation Systems Simplify Waste Water Processes

Hidrostal Prerostal Pumps in ServicePrerostal® Pre-Rotation System:

The PREROSTAL® Prerotation system is a unique, economical, uncomplicated method of automatically adjusting pumping volume to match varying inflow rates using a constant speed motor and pump. It combines the screw centrifugal impeller of a Hidrostal pump with a special chamber around the suction pipe. The chamber utilizes gravity to impart a fluid spin in the same direction of rotation as the pump impeller. As a result, this spin produces a flow reduction without the necessity of changing pump speed. Furthermore, this method of matching pump outflow to pump station inflow eliminates the need for any electrical equipment such as inverter drives.

In addition, the PREROSTAL system is a highly effective sump cleaning system which does not require any additional mechanical or electrical components such as controls for mixers or aerators.  It is the ideal solution for handling variable flow applications with large or troublesome solids.

PREROCLEAN™ Pre-Rotation System:

The PreroClean™ Self Cleaning Sump is a simplified version of the PREROSTAL. In applications where the primary aim is maintaining clean sumps without the need for flow matching, Preroclean is the best choice. This option works the same as the PREROSTAL but the weir height and channel dimensions are fixed for each pump size. Due to this, construction can be simplified by moulding the system as a single piece.

The PREROSTAL system is a proven and cost effective replacement for Archimedean screw pump systems.  We have successfully replaced numerous installations around the world!

Prerostal Advantages over Archimedean Screw Systems:

  • Require less space
  • Fluids are More Contained: Less smell and exposure risk
  • Require less ancillary equipment


The below video is an in depth look at the system features and benefits, especially as compared to archimedean screw systems.

What is a Prerostal System and how does it work?


Tag Archive: WEMCO-Hidrostal

Trust Only the Original Screw Centrifugal Pumps from Hidrostal

Posted on by Sara Springer

The Original Screw Centrifugal Pump was Invented by Martin Stähle

Hidrostal Screw Centrifugal End Suction Immersible PumpIn the 1950s Martin Stähle invented and developed the first Hidrostal Screw Centrifugal Pump in Lima, Peru. This design has proven itself through the years and been put to the test in a wide range of applications.

Due to their outstanding characteristics, Hidrostal pumps are used in numerous municipal and industrial sectors all around the world. Our pumps are custom-made and are specially tailored to the needs of each location. Our specialists select the suitable material combinations and individually adapt every pump to the local conditions. We ensure with this process that Hidrostal pumps are successful in difficult applications and achieve the best results with respect to performance, energy efficiency and low life-cycle costs.

There are many imitation screw centrifugal pumps, made by just as many companies, but there is only one original. Do not be fooled by marketing lingo designed to fool you. For many years Weir Salt Lake City© (WEMCO©, Weir Power and Industrial©, etc.) used to represent Hidrostal to the United States and Canada. All the pumps they sold up to 2015 were made by Hidrostal, and now they market their own pump, which does not share the same time tested performance as the original.

If you want the best screw centrifugal pump, trust the original! Contact Springer Pumps for more information or a quote today.

  • Clog-free pumping
  • High suction capacity
  • Gentle delivery due to low shear forces
  • High efficiency
  • Stable, steep pump curve
  • Long service life
  • Low pulsation
  • Continuous flow proportional to the speed
  • High pressure stability across a wide speed range

Springer Pumps is not affiliated with, sponsored by or endorsed by Weir Salt Lake City© WEMCO©, Weir Power and Industrial© or any of it’s affiliated companies. Hidrostal parts or products are not WEMCO© parts or products.