Peristaltic pump survives extreme abrasive duties
A
Larox Flowsys product story
Edited by the Engineeringtalk editorial team
Oct 2, 2006
Widely used in brewery filtration, kieselguhr - also known as diatomaceous earth or diatomite - is extremely abrasive, causing intense wear in conventional pumps.
Widely used in brewery filtration, kieselguhr - also known as diatomaceous earth or diatomite - is extremely abrasive, causing intense wear in conventional pumps.
In addition to breweries, kieselguhr is used as a filtering body to clarify syrups and sugar and as a filling material in paper, paints, ceramics, soaps and detergents.
Because of its abrasive properties, there are only a few pumps that can reliably handle kielselguhr.
A Larox peristaltic pump is one of the few that can.
Made of the most durable and abrasion resistant materials, the robust Larox LPP is a safe and reliable pump even when handling the most aggressive media.
To optimise their filtration efficiency, Paulaner Brauerei, the largest brewery in Munich replaced a traditional hose pump with a Larox peristaltic pump (LPP 40) to feed kieselguhr to a pressure filter which dewaters the spent kieselguhr before disposal.
During the filter feed, the feed line pressure increases from 0 to 7.5bar.
This pressure controls the pump speed through a frequency inverter whilst the pressure pulsation in the feed line is minimised.
Filter feed time is 7-8min, with a maximum flow rate of 7m3/h (93rev/min).
The minimum flow rate is 1.5m3/h (21rev/min).
Since its installation in June 2005, the pump has been in continuous operation.
The innovative Larox pumps set the industry standard for peristaltic pump technology.
Designed for heavy industrial duties, the LPP pump is ideal for abrasive, corrosive, viscous or crystallising media.
One compression is all you need.
A single, bearing-mounted roller presses against the hose only once per the 360 degree operating cycle, producing the maximum flow per revolution.
The operating principle of the LPP pump is based on the peristaltic effect.
As the cylindrical rotor rotates along the hose, the process medium gets pushed forward through the hose.
At the same time, the hose behind the compression point reverts to its original circular shape creating a suction effect at the pump inlet port.
As a result, the hose bore gets filled with the medium.
No backward flow can occur as the hose is squeezed tight by the roller.
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Tel +358 201 113 311
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