|Tips & Recommendations|
|This is a collection of tips and recommendations compiled by Kewpump’s engineers for your useful reference. These are by no means comprehensive but are some of industry best practices that can help you get the best out of your pumping solutions. |
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Always use an eccentric reducer at the pump suction when a pipe size transition is required. Put the flat on top when the fluid is coming from below or straight (see figure below) and the flat on the bottom when the fluid is coming from the top.This will avoid an air pocket at the pump suction and allow air to be evacuated.
There is a minimum height to be respected between the free surface of the pump suction tank and the pump suction. If this height is not maintained a vortex will form at the surface and cause air to be entrained in the pump reducing the pump capacity. Figure below shows the recommendation of minimum pump suction submersion.
Select your pump based on total head (not discharge pressure) and flow rate. The flow rate will depend on your maximum requirement. Total head is the amount of energy that the pump needs to deliver to account for the elevation difference and friction loss in your system.Depending on the industry or plant that you work in, you will be either select a certain type of pump or manufacturer or both. Manufacturers are normally a very good source of information for final pump selection and you should always consult with them, do your own selection first and confirm it with the manufacturer. They can help you select the right type, model, and speed if you have all the operating conditions.In the selection process, try to match the flow rate with the B.E.P. (best efficiency point) of the pump. If it is not possible to match the flow rate with the B.E.P., try to remain in the range of 80% to 110% of the B.E.P.. Operating outside this range will lead to excessive vibration, recirculation and cavitation (see figure below).