In order to choose the pump that meets your needs, it is necessary to determine its characteristics based on its application.
First, you need to determine the type of media to be transported in order to avoid corrosion phenomena that can lead to premature pump wear. Therefore, it is necessary to know the chemical composition, viscosity and possible solid content of the pumped medium. A comprehensive understanding of all physical properties of the processed fluid enables you to select the ideal technology for your application and select materials that are compatible with the pumped media. Before selecting a pump body, it is necessary to refer to the chemical compatibility table.
Then you need to check the characteristics related to the transmission medium, in particular:
1)Required flow: Generally in m3/h (cubic meters per hour) or GPM (gallons per minute), this flow will inevitably affect the size and dimensions of the pump;
2)Suction lift (the height between the inlet of the suction pipe and the pump): In general, the suction height should not exceed 10 meters. Beyond that, a submersible pump needs to be considered.
3)Discharge head (height between pump and discharge pipe outlet).
4)The length of the discharge loop.
5)Head loss related to obstructions (valves, elbows, etc.) on the pumping circuit.
6)Having a drain tank may change the head.
7)Select the pump body according to the temperature.
8)From these different values, the NPSHa (Net Positive Suction Head) of the device can be calculated. Allows you to choose the right pump and avoid the risk of cavitation.
9)You also need to control efficiency; efficiency must be optimal at around 30% of the nominal flow required.
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