The choice of equipment for the heating system and heating appliances, as a rule, is carried out by specialists. However, there are also cases when it is not possible to resort to the help of professionals, and the owner must perform all the installation and purchase of equipment himself.

To facilitate the task of choosing a circulation pump for heating systems with forced circulation of the coolant, it is important to understand some of the nuances.

For reliable and long-term operation, the circulation pump must meet the following conditions: - have low power consumption; - for a long time to work smoothly without the slightest intervention of a specialist or maintenance worker; - do not make a lot of noise when working.

If your house has an area of ​​​​approximately 250 square meters, then you will need a pump capable of circulating 3.5 cubic meters. water per hour.

The maximum pressure that such a pump should give out is 0.4 atmospheres. If the area of house is 250-350 square meters, then a pump will be required, whose productivity reaches 4.5 cubic meters. water per hour.

The maximum pressure of such a pressure should already reach 0.6 atm. If the house has an area of ​​​​350-800 square meters, then it is recommended to use a pump with a capacity of up to 11 cubic meters. per hour at a maximum pressure of 0.8 atm.

In those situations when it is necessary to find out with greater accuracy the parameters of the circulation pump required for the heating system, the following factors should be taken into account: - the total length of the line; - pipe diameter; - pipe material and roughness of the inner surface of the pipes; - degree of clogging of pipes; - type of heating devices; - number of heaters; - type of equipment that has a locking and regulating function; - type of automation (if any).

If the circulation pump has been correctly selected, it will work for a long time, quietly, and without failures. The industry produces circulation pumps with the function of regulating the speed of the pump shaft. Such regulation allows to reduce energy consumption and noise within the range of 30-40%, as well as to extend the life of the pump. The adjustable circulation pump can also independently change the speed depending on the temperature of the coolant in the heating system.

During the installation of the circulation pump, it must be taken into account that it is not able to function normally if there is air or a large number of air bubbles in the coolant. In order to perform the task of eliminating air from the circulation pump, automatic air vents are used.

Now on the market you can buy a lot of both domestic and foreign circulation pumps. Among the domestic models of circulation pumps, the low-noise linear circulation pump TsVTs manufactured by OAO Livgidromash is very popular . This model is mounted directly on the pipes, and also has a common unit with an electric motor.

Foreign circulation pumps, as a rule, are made without the use of glands. They have a very low noise level. They have wet rotors - their rotor is located directly in the coolant pipe. Such a rotor is separated from the stator by a thin film. These circulation pumps are lightweight. They are mounted on pipes without the need for auxiliary supports. For example, these are low-noise circulators with a spherical rotor from Laing or economical Wilo-Stratos circulators with a wet rotor from Wilo .

Wilo-Stratos - economical wet rotor circulation pump for hot water heating systems	Spherical Rotor Laing Energy Saving Circulation Pumps	Circulating linear centrifugal pumps TsVTs (Livgidromash)

Foreign circulation pumps, as a rule, are made of cast iron. Their rotor impeller is made of high-strength composite material or stainless steel. These pumps use ceramic bearing systems, which have a very long service life. All foreign models of circulation pumps are practically equipped with a release function. This function allows the circulation pump to operate in short-term off and on modes if a foreign body enters the pump. Also, this mode of operation in the circulation pump is used when starting the unit after a period of long rest.