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Submersible Pumps: Three Crucial Tips for Improving Performance

January 6, 2020

Submersible pumps operate underwater. A small aquarium pump, a larger underwater sump pump, these are just two examples of this well-known pumping application. For the equipment to function properly, then, it must be waterproof. That's a patently obvious feature, of course. Now, as a thought exercise, to improve their performance, what other important equipment attributes need fine-tuning? We'll start by structuring a maintenance strategy, one that'll keep the equipment in good trim.

Maintenance Programs Prevent Submersible Pump Fatigue

Types of fluid conditions directly influence the length of time between maintenance assignments. If there's a lot of free-floating debris in a garden feature or sump pump basin, a shorter period is advised between the servicing. If the water is dirty and full of impeller clogging residue, then it's imperative that the checks are carried out regularly. In obeying this submersible-centric pumping rule, maintenance techs clear impeller blockages, seal fatiguing debris, and the heat-generating failure events that blow circuit breakers and cause premature equipment wear.

B.E.P Balanced Devices Perform Better

The B.E.P. of a submersible pump, its Best Efficiency Point, is used to ensure peak performance. This is a metric that takes place back at the pump selection stage, so it can be considered a pre-selection proviso. Anyway, to prevent bearing stress, to hit that peak performance sweet spot, installation engineers select submersible equipment types that have suitable BEP ratings, performance curves that match the desired flow conditions. By following this mandate, radial and axial stress issues are offset. Such stresses are harder to manage when a pump is actually installed in a turbulent fluid.

Control Short Cycling Intervals

A poorly managed underwater pump turns on and stays that way, or it's continually turning off and on again. That's an undesirable sequence. Rather, the length of the sequence is unacceptable because all that work is taking its toll on the machinery. The pump motor overheats because of the continuous switching, bearings become fatigued, and the equipment inevitably falls into a state of disrepair. The pump controls, fluid volume, and flow rate must all be adjusted until the pump's operational cycle is regulated, until it provides the required discharge rate but not at the cost of an overly active, heavily cycling pump action.

At least one of these crucially important performance shaping tips takes place back at the installation phase of a submersible pump's life. The installation tech picks out a device that'll offer a satisfactory BEP, which is influenced by the flow conditions of the local fluid medium. Otherwise, we tune the pump and care for its workings. Impeller waste is cleared, seal damage is inspected, and filters are replaced. Of some relevance here, Variable Frequency Drives are being used to compensate for some of the shortcomings covered above.

Parker Pumps

29B Ormond Rd., East Geelong VIC 3219

Phone: (03) 5229 7443

Email: sales@parkerpumps.com.au

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