n IMIESA - The economic alternative : water and wastewater
|Article Title||The economic alternative : water and wastewater|
|© Publisher:||3S Media (Pty) Ltd|
|Publication Date||May 2005|
|Pages||22 - 23|
Extracted from text ... 22 - IMIESA MAY 2005 WATER AND WASTEWATER The economic alternative by Jim Fisher* In many countries a negative perception of multistage pumps prevails. They are viewed as expensive to purchase and maintain, due to the need for specialised labour, expensive spare parts and often having to return the pump to service centres or to the manufacturer directly. In cases of repair, it was often cheaper to simply buy a new pump. In boreholes, the limited diameter and high heads required have made multistage submersibles the pump of choice. Advances such as modular designs, user-replaceable wear parts and novel materials ..
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