Action on Pumping Systems

Oversized pumps may be detected by:

• Excessive flow noise

• Highly throttled flow control valves

• Heavy use of bypass lines

• Frequent replacements of bearings and seals, as well as

• Intermittent pump operation

Corrective measures for oversized pumps include:

• Using an adjustable speed drive to control the pump if flow rates are variable

• Using a pony pump to reduce intermittent operation of the existing pump

• Trimming the impeller

• Replacing the impeller with a smaller one

• Downsizing the pump/motor assembly

Piping should be designed to avoid interfering with flow. 

Flow straighteners may be used to improve flow.