Improved Pump Hydraulic Selection Extends Pump Life

The major components of the life cycle cost of ownership are initial cost, installation cost, operating cost, and maintenance cost. Laboratory tests on three API end suction pumps, and maintenance data collected on 119 ANSI and split case pumps were used to validate the hydraulic selection reliabili...

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Bibliographic Details
Published inPump User's Handbook pp. 115 - 128
Main Authors Budris, Allan R, Bloch, Heinz P
Format Book Chapter
LanguageEnglish
Published United Kingdom Routledge 2013
River Publishers
Edition4
Subjects
Impeller Vanes
Cavitation Resistant
Stainless Steel Impeller
Gating Values
Suction Nozzle
Valve Closure
Pump Suction
Split Case Pumps
NPSHr
Reliability Factor
Pump Specific Speed
Impeller Materials
Suction Energy
Suction Recirculation
End Suction Pump
Hydraulic Institute Standard
Centrifugal Pumps
Water Hammer
Cavitation Damage
Specific Speed
Split Case
Suction Specific Speed
Pump Reliability
Impeller Inlet
Pump Speed
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Summary:The major components of the life cycle cost of ownership are initial cost, installation cost, operating cost, and maintenance cost. Laboratory tests on three API end suction pumps, and maintenance data collected on 119 ANSI and split case pumps were used to validate the hydraulic selection reliability indicators. Operating speed affects reliability through rubbing contact, such as seal faces, reduced bearing life through increased cycling, lubricant degradation and reduced viscosity due to increased temperature, and wetted component wear due to abrasives in the pumpage. Design characteristics for both performance and service life are optimized around a rate of flow designated as the best efficiency point. Suction recirculation is a condition where the flow in the inlet portion of an impeller is separated from the vanes and ejected upstream, opposite to the direction of net flow entering the impeller, often well into the suction pipe.
ISBN:9781482228649
1482228645
DOI:10.1201/9781003151807-5