Where is it better to install an expansion tank. On the feed or return?

Every part of heating systems is essential to maintaining their longevity and efficiency. The expansion tank is one such part that aids in controlling the pressure variations that take place inside the system. On the other hand, professionals and homeowners frequently wonder if it is better to install the expansion tank on the return line or the feed line.

Your heating system’s overall efficiency and performance may be affected by where the expansion tank is located. Every location has a unique set of benefits and things to think about that might affect your choice. You can install the expansion tank on the feed or return line, depending on your system’s requirements, by knowing the differences between the two installations.

We’ll examine the advantages and disadvantages of adding an expansion tank to the feed and return lines in this post. We’ll look at how each placement impacts the efficiency, functionality, and maintenance needs of the system. Gaining knowledge about these factors will help you determine the best location for an expansion tank installation for your particular heating system.

Location Reason
On the feed Helps reduce noise and air pockets in the system
On the return Protects the boiler and prevents potential damage due to pressure fluctuations

Connective tank connection to feed

What is meant by "installing the tank for feed"? Extremely basic: in this kind of expansion tank installation, pressure from the expansion barrel is pumped by the circulation pump. In other words, the tank is mounted on the pump’s suction side. Take a look at how this is represented in the overall performance of your home heating system below.

We fill it with water after putting together this heating chain, where the pump emerges from the expansion tank. Consider pumping one bar of static pressure of water. The pump will start to produce dynamic pressure as soon as it is turned on. The testimony of the pressure gauges positioned in various system corners makes this clear to see.

Thus, the pump is activated. An atmospheric pressure of 1.5 is produced by it. The pressure readings on the manometer nearest to it equal 1.4 bar. The pressure decreases steadily as the liquid in the system reaches successive measuring devices.

When ζидкость совершает полный круг обращения по системе и доходит до установленного расширительного бачка, пто динамическое давление системы отопления будет равняться статическому. Additionally, the pressure will decrease even more at the location where the pump and tank are connected, lessening the strain on the system.

Installation of an expansion tank in the background system

As per our decision, the addition of an expansion tank for feed ensures that the heating system’s dynamic pressure on the approach to Baku is in line with the static pressure. When the tank is connected for processing, the image will be entirely different.

For the sake of convenience, let’s say that the system has the same dimensions and specifications. The installation of the tank at the pump’s pressure outlet is the only distinction. This results in the pump pressing inside the expansion tank initially.

Once more, the system is filled with liquid, producing one bar of pressure. When the pump is turned on, what happens next? Additionally, 1.5 bar of pressure is produced. Redistribution of pressure to the expansion tank comes next. At this point, the dynamic pressure equals the static pressure, just like it does when the supply tank is installed. However, once the injection exits the expansion tank, it will become evident from examining the manometers’ testimony that the system’s dynamic pressure is lower than its static pressure!

Nevertheless, even though the second installation method seems more convenient, the pressure can drop below atmospheric pressure if the heating system’s length is incorrectly calculated and static pressure is not properly supplied. As a result, water starts to boil at lower temperatures, which causes the pump to wear out incredibly quickly and destroys the blades in a short amount of time.

What should be remembered when installing an expansion tank

When the temperature rises above zero, a membrane tank installation should be done.

To ensure that access to its constipation and plum is not obstructed, the tank needs to be connected.

The system wherein a water meter maintains a steady initial pressure in the tank before the pressure gear is installed.

⦁ The expansion tank is positioned so that the running reinforcement is in front of the protection valve.

Selecting between the feed and return lines when installing an expansion tank for your heating system can be a little confusing. There are supporters of both locations, but knowing the dynamics can help you choose wisely.

When the expansion tank is installed on the feed line, the circulating pump comes first. By letting the expanded water enter the tank freely, this configuration can lessen the strain on the pump. However, depending on the specifications of your system, this location might need extra protection against high pressure, so keep that in mind.

However, after the circulating pump on the return line, positioning the expansion tank can help reduce pressure swings and guarantee a more steady flow. This placement may be useful if you wish to shield delicate components downstream from pressure spikes or if the pressure levels in your system fluctuate.

In summary, each location for the expansion tank has advantages, and the optimal option will rely on your preferences, system architecture, and particular requirements. Seeking advice from a heating specialist can yield insightful advice specific to your circumstances, guaranteeing your heating system operates at peak efficiency and lasts a long time.

The longevity and efficiency of your heating system greatly depend on where the expansion tank is placed. It is generally advised to install the expansion tank on the system’s supply or feed side. By positioning it here, you can protect your system from potential damage by allowing the tank to absorb excess pressure caused by the heating water. The expansion tank may not be as good at controlling pressure changes when it is on the return side, which could cause problems later on. Therefore, it is preferable to place the expansion tank on the supply side of your heating system for best results and peace of mind.

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Sergey Ivanov

I like to help people create comfort and comfort in their homes. I share my experience and knowledge in articles so that you can make the right choice of a heating and insulation system for your home.

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