The approach to maintenance is addressed as a predictive strategy avoiding even more costly non-productive time due to downtime caused by failure or induced by maintenance. Condition monitoring and assessment is described as one of the effective tools in the maintenance engineer's armoury to apply a predictive approach.
Positive displacement (P-D) pumps, both piston and plunger type, are sometimes used for long distance pumping. For many applications multi-stage centrifugal slurry pumps offer advantages over P-D pumps. The following gives some indication of these advantages.
By 2010 purchases of centrifugal pumps in China will rise to over $5 billion. China will surpass the US whose purchases are projected at under $4.9 billion. The top ten purchasers in 2010 will include primarily Asian and European countries.