February 2018

Maintenance and Reliability

Consider pitot tube pumps for low-flow, high-head applications

Low-flow, high-head pumping requirements in refining and petrochemical plants make up less than 2% of the total pump population. This minor percentage is creating significant reliability concerns, which result in low mean-time between failures (MTBF), as well as high maintenance costs.

Alshaye, A., Saudi Aramco

Low-flow, high-head pumping requirements in refining and petrochemical plants make up less than 2% of the total pump population. This minor percentage is creating significant reliability concerns, which result in low mean-time between failures (MTBF), as well as high maintenance costs. The pump duty of concern is any flowrate below 90 m3/hr, with a head higher than 500 m. Typical centrifugal pump hydraulics, including the multistage design, do not cover this portion of low specific speed (less than 500 in US units), where a relatively small flowrate is required at a very high pressure. From a technical and manufacturing perspective, it is possible to make such a pump, but it would be very e

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