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Compact turbine pumps for low flow, high pressure applications

When a reliable and economic pumping solution is required for applications involving low flows (130 lit/min) high pressures (up to 70 bar) and heads up to 600m, MTH regenerative turbine pumps are an ideal choice. A good example of this is the MTH M52 pumps recently supplied by Pump Engineering for a mechanical seal lubrication and pressurising application in oil production.

The MTH range of pumps is ideally suited to applications such as boiler feed, high pressure cooling, refrigeration and CIP process. These compact pumps, which are available in direct drive, bareshaft, magnetic drive and canned rotor options, can replace multistage pumps, generating high heads in only a single stage. This design allows the pump to handle hot liquids, refrigerants, liquefied gases and liquids with entrained air, for example gas dissolution systems, where the pump will self-vent carrying air bubbles with the fluid to the discharge port.

The regenerative turbine pump is characterised by its unique impeller, which has a large number of blades machined into both sides of its periphery. Fluid enters the impeller at its outside diameter and is accelerated as it passes from blade to blade exiting the pump, at the same radius as the inlet. The row of blades located on each side of the impeller minimises axial thrust; in effect, it is two impellers in one, operating within identical channels on the casing and the cover which allows the impeller to float freely and find its own equilibrium.

Another important advantage of the regenerative turbine pump is its ability to generate a steeply rising head curve between minimum and maximum flow ensuring accurate flow control and very stable operation.

The standard range of MTH pumps includes models which cover capacities from 1 to 500 lit/min and pressures up to 70 bar. Construction materials include iron, bronze and 316 stainless steel.