What is Pump Priming and Why is Priming Necessary in Centrifugal Pumps?

What is Pump Priming? : Benefits of priming / How Priming do / How Priming work / Troubleshooting during priming / Principle of priming.

When you prime a pump, you are filling the pump chamber with liquid, which allows the pump to start and run without any trouble.

What is Pump Priming
What is Pump Priming?

In boiler feed pump systems, priming is an essential process that must be performed correctly in order to avoid system failure. Here at our company, we understand the importance of priming and take all the necessary precautions to ensure that your pump is primed correctly.

What is Pump Priming and Why is Priming Necessary in Centrifugal Pumps?

In this article, we will discuss the benefits of priming in boiler feed pump systems and explain why it is such an important process. We’ll also provide some tips on how to prime your pump correctly.

What Is Priming in Boiler Feed Pump Systems?

In very simple terms, priming in boiler feed pump systems is the process of adding water to the pump in order to create a fluid column. This fluid column provides a path of least resistance for the pump to draw from, which means that it can start pumping water without any problems.

One of the main benefits of priming is that it minimizes the chances of airlocks forming in the pump. When an airlock forms, it can cause the pump to stop working and result in water leakage. By priming the pump, you’re essentially getting rid of any air bubbles that might be present and preventing them from forming in the future.

Reasons to Prime a Boiler Feed Pump

When you prime a boiler feed pump, you are pumping clean water into the boiler to help it start. This is an important step, and there are several reasons why you should prime your boiler feed pump:

The most obvious reason is that it helps the boiler start. If you do not prime the pump, the boiler may not start at all, or it may start but not work properly.

Another reason to prime the pump is to avoid water hammer. When the pump starts up without being primed, it can create a surge of water that can cause damage to the system.

Finally, priming the pump helps to ensure that the boiler will run properly and provide enough steam for your needs.

How Does Priming Work?

Now that we have a good understanding of what priming is, let’s take a look at how it works.

In its most basic form, priming is the process of filling the pipe or system with water before starting the pump. This creates a more fluid system, which reduces the risk of airlocks and subsequent damage to the pump.

It’s important to note that priming is not limited to pumps—it can also be used in piping systems, valves and other pieces of equipment. In fact, priming is often used as a preventive measure to avoid problems before they start.

Methods of Priming in Boiler Feed Pumps

Different methods of priming are available depending on the design criteria. The most common are mechanical, air-assisted mechanical and air-operated.

Mechanical primers use centrifugal forces to draw fluid into the pump. As the impeller turns, it creates a vacuum that draws in liquid as it moves around. This method is preferred when dealing with viscous materials and where quick filling is needed.

Air-assisted mechanical primers use an air pocket to create a vacuum that draws in liquid from the suction side. This method works well for applications with restricted flow or a low volume of fluid and less viscous materials.

Air-operated primers work by using pressurized air to draw the liquid in from the suction side, creating a vacuum. This method is often used when dealing with high viscosity fluids, as it has a higher capacity for suction than other ways of priming pumps.

Advantages of Boiler Feed Pump Priming

Priming boiler feed pumps is an important part of the system maintenance process. And while you may think this process is tedious and time-consuming, there are actually several benefits associated with doing it.

One of the most obvious advantages of priming your boiler feed pump is that it can help prevent cavitation. Cavitation occurs when vapor bubbles form in the water, resulting in less efficient operation and increased wear on the pump parts. Priming can eliminate this problem, improving efficiency and extending the life of your equipment over time.

Priming also ensures a steady flow rate throughout your system, reducing potential pressure spikes and allowing for more consistent operation. Plus, primed pumps use less energy to operate, meaning they can save money on energy costs in the long run—a definite bonus!

So if you want to make sure your boiler feed pump system runs smoothly and efficiently, then it’s a good idea to invest in a priming device. It might take a bit of extra effort initially, but it will save you money and headaches down the road.

The Impact of Priming on Boiler Feed Pumps

An often overlooked aspect of boiler feed pump systems is their need for priming. Priming is the process of adding a liquid to an impeller chamber to reduce air entrainment in the system. This is necessary for several reasons. Firstly, it helps to ensure that the pump can handle high-viscosity liquids. Secondly, it reduces migration of air and helps prevent pump cavitation. And lastly, priming helps to prevent wear on the moving parts in the system due to reduced friction between the impeller and the liquid.

Without priming, these systems would have a shorter lifespan. This means that in order to maximize efficiency and keep maintenance costs down, it’s important to take advantage of priming when operating boiler feed pumps. This can be done manually or automatically depending on your setup and preference. The key is to do it consistently so you can get as much life out of your system as possible!

Common Troubleshooting Tips for Boiler Feed Pump Priming

Having trouble getting your boiler feed pump system primed? Here are some troubleshooting tips to try:

  • If you’re having issues priming the pump, check for any blockages or restrictions in the pipe. It could be that something is clogging up the system, preventing it from filling with water properly.
  • Make sure the vent valve for the pump relief is working correctly. If it’s stuck open, it can lead to priming problems.
  • Check the suction line for any air leaks. A small air leak can cause priming issues, since air is being sucked into the system and preventing it from filling with water.
  • Make sure the suction pressure is set correctly. Too much or too little pressure can prevent proper priming of the pump.
  • Reduce the amount of water in your boiler feed tank if necessary. Too much water in there can cause problems with priming as well.

These are just a few of the common troubleshooting tips when it comes to priming your boiler feed pump system, but if all else fails, don’t be afraid to contact a professional for help.

Principle of priming in feed pump

Priming in boiler feed pump systems is the process of filling the feed lines and pumps with liquid before operating them. This means that priming allows you to avoid problems such as cavitation, which can cause severe damage to your pump systems.

The principle of priming is simple—just like when you fill an empty cup with water in order to drink from it, the feed pump must also be filled with liquid in order to be able to start pumping it. This ensures that the pressure in the intake side of the pump is always greater than atmospheric pressure.

One important thing to note is that it’s important to fill up your feed pumps before starting them up, or else they won’t work efficiently. This can lead to premature failure and high energy costs due to inefficient operation. So make sure you prime your boiler feed pumps every time before starting them up!


In conclusion, priming is an essential process in boiler feed pump systems that should not be overlooked. By understanding the benefits of priming and taking the necessary steps to properly prime your pumps, you can ensure efficient and reliable operation of your system.

Leave a Comment