Learning the differences between the different types of water pumps can be confusing, much like the ones provided by Flux Pumps or similar companies. This guide aims at helping you understand the differences and how every water pump function, which makes selecting a Pedrollo water pump much easier than in other places.
Centrifugal Water Pumps
This is any pump that raises liquid pressure or induces flow, resulting in a pumping action. Centrifugal water pumps is a preferable hydraulic pump that is used in more than 95% industrial and domestic applications. They are simple to operate, require low maintenance, and are cost-effective, and because of this, used universally.
Inside the pump, the casing features an impeller, consisting of a set of curved vanes for rotation purposes. When submersed in water, the vanes rotate the liquid. Due to this, it builds centrifugal force to the water particles, forcing the water out. The easiest way you can imagine this water flicking effect that is experienced when a car tyre is running on a wet road. Instead of a scooping action from the curved vanes on the impeller, the force is created centrifugally.
For centrifugal water pumps to function, they have to submersed inside water or operated on flooded suction lines. The main disadvantage of this pump type is the air. For instance, when a standard centrifugal pump comes across air, it becomes air-bound. Because of this, it becomes difficult to pump pumpwater pumpsair compared to water, meaning that the pump cannot force the water out using pressure.
When in full operational order, the pump will be filled with water, with no air traces. Somehow, if air happens to get into the pump, it will bound and stick until the removal of air.
Peripheral Water Pumps
Peripheral water pumps, also referred to as turbine pumps or regenerative, have the same appearance as a centrifugal pump. The internals vary in that they are able to develop high discharge heads at very low flow rates. The peripheral pump fluid is pumped directly into a peripheral channel (around the casing edge). As the fluid flow reduces, the curves don’t flatten, unlike conventional centrifugal pumps. In summary, the fluid moves along the inlet to outlet circumference with increased pressure.
Self-Priming Centrifugal Pumps
Self-priming centrifugal pumps, on the other end, resolve the issue that is experienced with the standard centrifugal pump. This water pump prevents air binding by mixing the air with water, which ends up creating a fluid that is the same as pure water and will pump normal as a result. After the completion of this process, the pump will get rid of the air and will move the water just like a standard centrifugal pump.
When the priming cycle is happening, air enters the pump and mixes with water at the impeller—the air and water exit by the centrifugal force of the impeller and get into the water reservoir. And as time goes, the air will end up rising while the water starts sinking eventually.
At this stage, the water is air-free and is heavier, meaning that water flows down the impeller, which is now a ready mixture, with even more air entering the suction line. Once the air has created a vacuum in the suction line, the pressure will then in turn, force water to get into the suction line towards the impeller direction and start pumping again.
When the pumping starts, the re-circulation of water halts, and the ensuing time the pump begins, it will self-prime. In this case, it will once again assist in mixing the air and water to create a pump-able fluid until the pump operates normally.