Now construction managers and engineers are increasingly under pressure to bolster efficiencies across their sites and they can make huge gains by using the right equipment for the job. One such piece of equipment is submersible dewatering pumps, which are vital in construction, mining and quarrying applications enabling users to remove water, sludge, and slurry. 

The type of application pump to be used on the job site is critical information. Just as important is taking the time to see what elevation, distance and flow are needed on the job. Without this knowledge, the likelihood of choosing the wrong unit to perform the work increases tremendously.

Taking the time to correctly answer these questions eliminates the biggest and most typical slip-ups during the pump selection process. To avoid costly mistakes, take a look at these recommendations for choosing submersible pumps.

This article from MASTRA Pump outlines the main considerations for specifying reliable submersible pumps.

What Liquid Needs Pumping?

The first consideration is the nature of the liquid being pumped as this has a major impact on the type of MASTRA pump you will need. Important factors to consider include general composition, the concentration and size of suspended particles as well as the liquid's pH level, temperature, and chemical content. For example, our MASTRA fully stainless steel pump 6SP30 series normal using water temperature is 35℃.

What Are the Capacity Requirements?

One of the most important performance considerations is the flow requirement, i.e., how much liquid needs to be moved and how quickly? For example, a pump with a maximum flow rate of 138 m3/h will remove water from a pool that is 36 m3 in 15 minutes. However, a pump with a flow rate of 350 m3/h would empty the pool in just 6 minutes.

For the best value and efficiencies, the pump selected should be able to handle the flow requirements with enough capacity to cope with fluctuations in water level as well as versatility to manage the demands of different sites. A pump which is over-specified and can handle a much higher flow capacity will be unnecessarily expensive and will not provide the most cost-effective solution. On the other hand, a pump that has been under-specified will struggle to transport the media and wear out more quickly, resulting in a shorter life span.

What is the Distance and the Elevation That the Fluid Needs to Be Pumped?

Over what height does the fluid need to be pumped and how far does it need to travel? This will have an impact on the pressure that the pump needs to deliver to ensure it can pump efficiently and reliably. The greater the distance the water needs to be pumped, the more friction is created, which results in pressure loss from the pump. Pumps need to overcome gravity resistance as well as friction losses.

What is Your Energy Source?

If mains electricity is available, our MASTRA electric pump will be the best and most efficient choice in most cases. Electric submersible pumps are the simplest, most energy-efficient and most economical approach, providing high power in light and compact packages.

If the site is remote and full of sunshine, considering a MASTRA solar DC pump system, whose pump can be screw one, centrifugal one or fully stainless steel one, and the motor is magnetoelectric machine, it is also equipped with controller.

Conclusion

Careful consideration of the liquid being pumped, together with the physical demands of the application such as flow, elevation and distance the fluid travels mean engineers will be able to select the most appropriate pump for the job and achieve maximum performance. Other factors to consider also include the energy economy, durability and servicing expense for each pump offered.