6 Things to Consider When Choosing the Right Submersible Pump

Firstly, consider the pumping information. What is the flow requirement – measured in litres per second or cubic metres per hour? What is the static head – or the vertical elevation change – in metres? It is critical that the pump’s kilowatt rating and impeller type are suited to the flow rate and the total dynamic head on the pipeline discharge point. Also consider the sump dimensions. What is the depth and the size of the opening? What is the size, percentage and specific gravity of the solids in the liquid to be pumped? What is the temperature of the liquid?

Secondly, outline the discharge information. What is the ‘run length’ to the discharge point? What is the length, diameter and material of the discharge hose? Friction losses in the hose, along with the static head, are the key factors in determining the total dynamic head.

Thirdly, establish the type and quality of power available on site. Check the voltage and phase, as these can vary from the normal 230 volts single phase to 400 or 500 volts three phase supply. Remember that power supply can be unreliable in remote locations, and poor quality power can cause pumps to fail.

Fourthly, estimate the level of suspended solids that can be expected in the liquid being pumped. Also determine the type, concentration and acidity of these solids, as these will affect the choice of design and construction material of the pump.

Fifthly, consider the conditions on site. Are there any site restrictions for the installation? Is it easy to gain access to the site? Can a vehicle reach the location where the pump is to be installed?

Finally, to make sure that the submersible pump selection is optimal, it is useful to draw on the professional insights of pump manufacturers and dealers. A pump expert can help to assess the demands of each application. Integrated Pump Technology has skilled and experienced distributors around southern Africa to advise customers on correct pump selection for a specific application. The company collaborates closely with these carefully selected distributors to ensure they are trained and supported in Grindex technology.