Expansion tank for heating: why is it needed?

What are the expansion tanks?

What are the expansion tanks?

The very structure of the device is extremely simple: it is a container partially or completely filled with air. Modern factory production, as a rule, is additionally equipped with a rubber membrane, which protects the interior of the heating system against the corrosive action of oxygen, as well as a pressure relief valve. It should be noted that such improvements are optional, not found in all models, as they are not necessary in all cases. More information on which tank for which system is needed( closed, open), read in the article "Expansion tank in the heating system".

How to choose the expansion tank for

heating There are several nuances that allow you to accurately and immediately determine the capacity model that will fully satisfy the specific heating system:

  • the tank volume is one tenth of the volume of the coolant in the system, however, it is not necessary to accurately calculate it.stock;
  • in membrane models with a nipple can adjust the air pressure to the required( factory parameters are equal to 1.5 kgf / cm2, and systems, as a rule, have a higher pressure of 0.2 kgf / cm);
  • red tanks designed for heating, and blue - for the supply of drinking water;In fact, the whole difference lies in the material of the membrane - in the blue rubber food;
  • when installing the reservoir should be set to its position, in which water or other heat carrier will be poured from above - so more air is removed;
  • if the safety valve works too hard, there is probably not enough tank capacity and it is worth installing an additional one;
  • many modern gas and electric boilers already include both an expansion tank and a circulation pump - make sure that there is none in yours before installing an additional one.

How to choose an expansion tank for heating

Expansion tanks:

price The price for a simple but extremely necessary device can vary significantly depending on the built-in functionality, the quality of the materials used, and the volume of the tank itself. On average, the capacity can be purchased from 3-4 to 11-24 thousand rubles, but in some cases you can do and copecks, if you make a tank with your own hands, and not select from the available in the range.

Expansion tank with your own hands

Immediately warn you that you will save only if you have an open heating system, where the circulation of the coolant is carried out naturally.

Expansion tank with own hands

Making a tank will require at least initial welding skills, but in general, the process is simple and can handle it almost anyone.

The actual gas or electric welding machine, 2-3 mm steel plate, Bulgarian or acetylene cutter

  1. We cut the metal sheet into five square or rectangular blanks of the order of 30x30 or 40x30 cm( although it is possible and others, depending on your needs.)
  2. Blanks need to be exposedat the right angle and carefully weld the seams

The cover is suitable for anything, it does not affect the functionality, and its main task is to protect the container from debris.oimi hands, but this process is clearly nerentabalen.

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