Product category:
OEM Pumps
News Release from: Watson-Marlow Bredel Pumps | Subject: Ellis and Everard
Edited by the Engineeringtalk Editorial
Team on 02 May 2002
Pump takes the rough with the roughage
Where a variety of other pump types had been tried and have failed, a Watson-Marlow Bredel SPX50 hose pump now handles a difficult effluent pumping duty at Ellis and Everard.
Where a variety of other pump types had been tried and have failed, a Watson-Marlow Bredel SPX50 hose pump now handles a difficult effluent pumping duty at Ellis and Everard (E and E), chemical suppliers, South Kirkby site The problems at E and E lay in the nature of the effluent produced, which can be acidic or alkaline with up to 10% solid content
This article was originally published on Engineeringtalk on 12 Feb 2008 at 8.00am (UK)
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The fluid effluent often consists of sodium bisulphate, caustic potash, hydrochloric and sulphuric acids in varying concentrations.
These aggressive chemicals, together with abrasive substances such as calcium deposits, grit and sludge, as well as extraneous items such as wire, plastics sacks, tie wraps, labels and bottle tops, create a seemingly unlikely mixture for a pump to handle.
All effluent and surface run-off from the entire site drains into a centrally located, six metre deep collection sump.
Operating automatically under the control of high and low level float switches, the Watson-Marlow Bredel SPX50 pumps from the sump against a head of approximately 3m, to the company's effluent treatment plant.
Other pumps tried on the duty included submersibles, air operated double diaphragm and various plastic-lined and all plastics centrifugal and positive displacement designs.
All were unable to cope to varying degrees, with the combination of solids, acids and other aggressive chemicals.
As well as corrosion and abrasive wear of these pumps, pump blockage was a frequent problem.
The Watson-Marlow Bredel SPX50 (50mm bore hose) provided the answer, with its "straight through" flow path there are no vanes, valves, rotors or pistons to corrode or impede the flow of solids and the heavy duty, abrasion resistant, reinforced EPDM hose is the only component in contact with the effluent.
The occasional hose blockage is inevitable when handling materials such large and irregular shaped solids, but can often be cleared by simply reversing the pump.
Pump output is 3mü/h; the hose is changed at six monthly intervals as part of the plant's routine maintenance programme.
The Watson-Marlow Bredel range of heavy-duty hose pumps is produced in sizes up 100mm inner-diameter hose for outputs up to 80mü/h and pressures up to 16bar. Request a free brochure from Watson-Marlow Bredel Pumps ...
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