Roth Magnetic Drive Pumps

THE ROTH REGENERATIVE TURBINE MAGNETIC DRIVE PUMP
The floating, self-centering regenerative turbine impeller(s) are able to produce any level of differential pressure up to 1,500 feet/ 450 meters. The self-centering regenerative turbine impeller is unique to only Roth Pumps and is protected under USA Patent Number 5137418.Coolant flow from the discharge (at discharge pressure) is routed through the inboard cover of the pump to the inside of a
“High Efficiency Containment Can”. The cooling liquid then flows around the inside surface of the can and is finally diverted to flow between the alpha sintered silicon carbide radial and thrust bearings, after which it return to a 50% lower pressure in the pump and joins the pump output.

Due to the use of a “High Efficiency Containment Can” very little heat is added to the liquid due to the relative motion of driver and driven inside to outside the can producing eddy currents that add heat.

The major purpose of the cooling circuit is the control of product liquid vapor pressure from the heating effect of the eddy
currents.

A secondary purpose of the cooling circuit is the forcing the liquid through the bearings circuits, the alpha sintered silicon carbide shaft sleeve and alpha sintered silicon carbide radial, and thrust bearings. Each bearing surface is provided with lubrication grooves to assure constant wetting on these bearing surfaces.

The high discharge pressure of Roth Pumps provides a sufficient margin above vapor pressure and insures maintenance of liquid
phase to avoid dry-run and damage.

The non-cavitating design of the Roth regenerative turbine pump insures that destructive vibration will not destroy the bearings.

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Roth Magnetic Drive Pumps