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Dry Running Pump Guide

Guide To: Dry Running your Pump

Dry running is not recommended with a Centrifugal Pump. Here at TS Pumps we have a wide range of pumps suitable to an array of different applications across multiple industries.


What is Dry Running?

The Dry Running of a pump refers to the absence of liquid internally while it is in operation, resulting in an increase in flow and pressure. This can put the pump at risk of overheating which would result in damage to the internal components.

There are however ways to avoid your pump running dry, including choosing the right pump and accessories for your application so that your operations run smoothly.


Can all Pumps Dry Run?

Although dry running a pump should be prevented, there are some ranges that allow for dry conditions inside the pump using built-in protection. These include Diaphragm Pumps and Peristaltic Pumps which can run dry for any length of time.

High Pressure Peristaltic Pump for dry running your pump

High Pressure Peristaltic Pump

The design of these pumps means that if dry running does occur it will not affect the quality of the internal parts.


Can Dry Running a Pump cause any damage?

One of the most common outcomes when dry running your pump is that the internal components will become extremely hot, causing them to melt or seize up onto the motor shaft. There is potential for this to happen with Centrifugal Pumps, Rotary Vane Pumps and Gear Pumps. This is because these pumps do not have the capability to dry run effectively if there are no additional controls fitted.


What causes a Pump to run dry?

Having your pump run dry can cause wasted pump energy and so it is important to know what the best practice is when it comes to your pump to avoid any time-wasting and inconvenience to your business operations.

The size of your pump will determine how much damage is done from dry running with the wrong pump. For example, if the pump is one of the bigger sizes from the range, damage will occur a lot faster due to heavier moving parts. Typically, pumps will run dry when they have been left for extended periods of time without proper controls in place. If dry running occurs for a minute or less only, it usually will not be long enough to cause any damage to the parts.


How to prevent Dry Running?

Certain pump manufacturers will have to install an accessory device onto the pump to ensure it cannot carry on operating when there is no fluid present. For example, a rotary lobe pump would require additional protection to prevent dry running from occurring. There are a variety of options available to suit your application, including the following:

With the addition of simple pump accessories, you will be able to reduce the risk of dry running ruining your pump and potentially wasting energy and money in your application process.


At TS Pumps we specialise in the supply and service of industrial pumps and systems into key industries and markets, so if this pump isn’t quite right for you, you can read more about our full range of pumps here or contact our team today to discuss your business requirements.

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