There has always been difficulty finding a reliable and cost-effective pump for applications where there is a combination of abrasives and corrosives. The equipment tends to be expensive to purchase and even more costly to maintain. Another issue is the hazardous nature of many of these applications and the extreme safety requirements for the personnel working on the equipment.Pumping a liquid that is only corrosive is relatively simple: find the correct materials of construction for the pump and piping and the system will generally be reliability. Due to the hazardous nature of these applications, magnetic or seal-less centrifugal pumps are used extensively to eliminate seal leakage and provide zero emissions from the pump. An alternative is a double or tandem mechanical seal with a barrier fluid. All of these designs tend to be subject to failure during system upsets.
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