Pump blockages are one of the most common reasons why submersible pumps lose performance or stop operating altogether. Solids accumulating around the impeller, suction plate or discharge pipe reduce hydraulic efficiency, increase wear and can eventually lead to costly downtime.
Fortunately, many blockages can be prevented through proper pump selection, correct system design and regular maintenance:
Choosing the Right Pump Makes the Difference
The first step is selecting a pump that matches the application. The pump should be designed for the expected solids content, particle size and concentration of the liquid being handled. For particularly demanding wastewater applications containing high levels of fibrous materials, Tsurumi cutting and macerating pumps offer an effective solution by reducing solids to smaller particles before they enter the discharge pipe, significantly lowering the risk of clogging.
A Well-Designed System Prevents Problems
The discharge pipework plays an equally important role. Pipes that are too small can create flow restrictions, while oversized pipes may reduce flow velocity, allowing solids to settle and accumulate.
Maintaining sufficient flow velocity helps keep solids suspended throughout the system and minimises sediment build-up. In addition, suitable screening devices prevent large foreign objects from entering the pump, protecting both the pump and the entire installation from unnecessary damage.
Preventive Maintenance Pays Off
Regular inspections are another key factor in ensuring reliable pump operation. Checking the suction plate, impeller and pump inlet for deposits allows potential problems to be identified and resolved before they develop into serious blockages. In most cases, preventive maintenance is considerably more cost-effective than unplanned repairs and downtime.
What to Do If a Pump Becomes Blocked
If a blockage does occur, the pump should first be disconnected from the power supply before any maintenance work begins. Accumulated solids should be removed from the suction plate and impeller, while the pump casing and surrounding components should be inspected for deposits or damage. The discharge pipe should also be checked for restrictions and, if necessary, flushed with clean water to remove trapped solids. After reassembly, the pump can be reconnected and tested to ensure normal operation has been restored.
Regular cleaning not only improves operational reliability but can also significantly extend the service life of your Tsurumi pump.
Are you dealing with solids-laden water or wastewater in your project? Our experts are happy to help you find the most suitable pumping solution for your application. Simply contact the Tsurumi sales team at sales@tsurumi.eu to arrange a personal consultation.
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