Accumulators and expansion tanks for heating systems (destiny and choice)

Expansion tank for heating systems for compensating for thermal expansion of the coolant, so that the pressure Air in such a tank should be at 0.1-0.2 bar less than the pressure of the secondary coolant maintained in the system heating. Usually it is 1.4 - 1.7 bar.

The volume of the expansion tank must be at least 10% of the heating system.

Hot water expansion tank is designed to compensate for thermal expansion of heated water for household needs. Pressure of air must correspond to the maximum pressure in the cold water system. That is, the tank has to be emptied and filled only with the expansion of water during heating.

The volume of hot water surge tank should be at least 10% of the boiler volume.

The accumulator is designed primarily to protect the work skvazhnogo, sump or booster pump. It was only the second-for the creation of water storage. The pump must not be switched on and off frequently, as it can be damaged. In most cases, the pressure in the accumulator set in the range of 1.2 - 2 bar.

The volume of the accumulator is selected individually for each case, depending on the water source and the amount of water consumed.

Have similar devices operating on the same principle, but have significant differences. Expansion tanks for heating systems have a rubber membrane of a material that withstands high temperatures. The accumulators have a membrane material that can be contacted with water, is suitable for food use. Expansion tanks for domestic hot water systems is a membrane which acts as food and water, and hot.

Structurally, the expansion tanks and accumulators - a metal container, which is mounted a rubber membrane, one side of which the air is injected, and on the other there is water or coolant. When the pressure is changed by the fluid is compressed air and forms "air spring." Depending on the use of a tank, the air pressure injected into the tank, is very different.

Tanks must be serviced (to check air pressure) in the absence of fluid pressure on the other hand, two times a year, but at least once.

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