Pumps for sumps

Available in the UK through Michael Smith Engineers, ARBO  single stage immersible pumps can handle capacities up to 300m3/h at differential heads up to 80m and liquids with viscosities up to 100cP.

The pumps are machined from a single block and as their manufacture involves no injection moulding or welding, they are not susceptible to stress cracking. 

They can be supplied in Polypropylene as standard and there are the options of HMPE, PVDF and PTFE for applications where more corrosive liquids, higher temperatures, or higher solid concentrations are involved.                     

ARBO pumps use a liquid seal with no mechanical parts in the process fluid. The company says that this seal design feature, together with the fact that the shaft bearings are outside the pumped liquid and the shaft is self-centring, means they can be safely dry run. The ‘half-open’ impeller design enables liquids with solids up to 4mm in diameter to be handled without damage. This minimises the risk of aeration and foaming occurring, even when circulating in low level tanks.    

The pumps are a compact, close-coupled design with the motor mounted directly to the pump flange They are said to require minimal maintenance.

Typical applications include water sump duties in gas scrubbing systems, acid transfer in galvanising lines and chemical sump emptying  in effluent treatment plants.