What are the different types of water pumps?  

Where there is excess water that needs to be removed, you’ll find a water pump carrying out the drainage process. A water pump is a device used to increase water pressure to transfer liquid from one area to another. Powered by electricity, gas, diesel, or solar energy, a motor converts energy into hydrodynamic energy for fluid flow.  

There is no one-size fits all for water pumps though and to get the ideal results for your application, you need the right one: 

Centrifugal pump  

A centrifugal pump is made up of impellers that are connected to a rotary pump shaft. This produces the energy needed to move the water within and pressurises the liquid to transport it through the piping system. Mechanical energy from the rotation of the impeller is transferred to the motion and pressure of the fluid. 

There a many different types of centrifugal water pumps, including hydraulically actuated and solenoid. These pumps are the preferred choice for lower-viscosity liquids and high flow rates, so they are used in a variety of residential and commercial applications.  

Dynamic pump  

A dynamic or rotodynamic pump is a velocity pump that is typically used to pump crude oil and in the food industry. Kinetic energy is added to the liquid to increase the flow velocity and then the resulting energy is transformed to gain in potential energy when the velocity decreases as the flow exits to the discharge line.  

In comparison to other water pumps, dynamic pumps are easier to maintain and require very little amount of space due to their small size.  

Rotary positive-displacement pumps  

Rotary positive-displacement pumps encompass a variety of devices, including gear pumps, screw pumps, hollow disk pumps, and vibratory pumps. These are able to manipulate highly viscous fluids that maintain higher flow rates, making them ideal for applications such as circulating lubricating fluid on mechanical equipment and hydraulic operating systems.  

Positive-displacement pumps use an expanding cavity to allow liquid to pass into the pump and then pass out again as the discharge side of the cavity decreases.  

Peristaltic pump  

Peristaltic pumps are also known as hose or tube pumps and have a variety of applications and advantages. It works by supplying the fluid with positive displacement principles using rotating rollers and then it is squeezed into a soft tube which expands and forms a vacuum. They are self-priming and great for flow regulation.  

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