Pump Performance

Performance can be described in more ways than one when discussing pumps. To us pump performance means not only ensuring the pumps perform to the required parameters to run efficiently but that upgrades and changes are made to ensure the pump runs achieving its ultimate performance.
To increase performance we need to be able to minimize losses throughout the pump. Most of these losses can cause smaller head than the initial design and higher power consumption. The results of these losses is the reduction in performance and ultimately the efficiency.

Some Examples Of Losses For Both Mechanical And Hydraulic Are

Mechanical friction losses can be caused by the pumps coupling or drive that consists of shaft seals, gears and bearings depending on your pump type.

For example, Shaft Seal losses are caused by friction. The size of loss may vary depending on the rotational speed and pressure. Therefore there would be an increased power demand, consequently reducing the performance of the pump.

Hydraulic losses occur along the pumps fluid path.

For Example, Three Hydraulic Losses Can Be

Mixing losses happen when the fluid flow path has sudden expansion or contraction increases, causing a velocity difference because the fluid particles no longer move at the same speed. Friction occurs between the molecules in the fluid, which result in a discharge head loss. Mixing losses mainly occur at the outlet of the impeller where the fluid flows into the Diffuser / Guidewheel or into the volute casing.

Incidence loss is when a difference between the angle of flow and blade at the impeller edge or the volute tongue occurs. A recirculation zone occurs on one side of the blade or volute tongue where there is a difference in these angles.

Between the shroud and hub of the impeller due to its rotation in the fluid, increases consumption of power which is a loss in performance, this is known as Disk Friction. Disk Friction size can vary depending on things such as the distance between the impeller and the casing or the surface roughness of the impeller and casing.

The above is only a few of the multitude of hydraulic and mechanical losses that can occur. We look at all losses that can affect your pumps performance, not just the above mentioned. Our aim is to ensure we increase the performance of all your pumps. An increase in performance is an increase in efficiency of your pump and your systems.

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