There are a variety of pump impeller types on the market today, and each has its own unique benefits and drawbacks. In this article, we’ll discuss the most common types of impellers and their impact. By understanding the different types of impellers available, you can make an informed decision about which pump is best for your specific needs.
Types of Pump Impellers
Let’s take a look at the most common pump impeller types.
Closed impellers have vanes on both sides fully enclosed by a protective shroud. This makes them stronger than open impellers, and therefore they can be used in larger, more powerful pumps that need to withstand greater strain. As they’re not as susceptible to cavitation, closed impellers tend to be more efficient than open impellers and can handle a greater solid content.
Open impeller pumps have vanes that aren’t covered on both sides, making them less expensive to manufacture. As they’re not as strong as closed impellers, they can only be used in smaller pumps that don’t need to withstand as much strain. Open impellers are also more susceptible to cavitation, so they aren’t as efficient as closed impellers.
Semi-open impellers have vanes that are only partially enclosed on one side by a protective shroud. This gives them some of the strength benefits of closed impellers while still allowing them to handle a higher solid content than open impellers. Semi-open impellers also require a lower NPSH to operate without cavitation, making them more efficient than open impellers.
Cutter impeller pumps are designed to handle solid-laden fluids, such as sewage, sludge, and stormwater runoff. These types of impellers have sharp blades that cut through solids, allowing them to be pumped without clogging. Cutter impeller pumps are typically used in wastewater treatment plants and drainage systems.
Vortex impeller pumps are also known as peripheral vortex pumps. These types of impeller pumps have vanes that extend radially from the center of the pump. The vanes on these types of impeller pumps are curved, and they are able to draw fluid into the center of the pump. These types of impeller pumps are typically used for applications where there is a need to move large amounts of fluid.
The Impact of the Impeller Diameter
The impeller diameter is one of the most important factors to consider when selecting an impeller pump. The impeller diameter will determine the flow rate and head pressure that the pump is able to generate. In general, larger impellers will be able to generate higher flow rates than smaller impellers. However, it’s important to note that the impeller diameter also has an impact on the efficiency of the pump. Larger impellers tend to be less efficient than smaller impellers because they have a greater surface area that can interact with the fluid being pumped.
As you can see, there are a variety of common pump impeller types on the market today, each with its own unique benefits and drawbacks. By understanding the different types of impeller pumps available, you can make an informed decision about which pump is best for your specific needs. If you have any questions about impeller pumps or need assistance selecting the right pump for your application, please contact Enviro-Line Co, Inc. today. We’ll be happy to help you find the perfect pump for your needs.
Categorised in: Pump Stations