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The important role of the expansion tank

(Summary description)Depending on the model, the expansion tank usually has 1-2 ports on the top and bottom of the tank. At the top of the tank is the balance of air pressure,

The important role of the expansion tank

(Summary description)Depending on the model, the expansion tank usually has 1-2 ports on the top and bottom of the tank. At the top of the tank is the balance of air pressure,

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Depending on the model, the expansion tank usually has 1-2 ports on the top and bottom of the tank. At the top of the tank is the balance of air pressure, and the air in the cooling system will return to the expansion tank from here. Located at the bottom of the water tank is the water outlet, which replenishes the coolant to the cooling system. The working principle is explained clearly, then the function of the expansion tank is easy to say.

With the expansion tank, the steam from the radiator and the engine water channel can be separated and stored to balance the system pressure. Whereas gas can be compressed, coolant cannot. Therefore, the expansion tank cannot be completely filled, and the liquid level cannot be higher than the upper limit of the expansion tank when pouring coolant.
The water-air separation of the expansion tank can reduce the occurrence of cavitation. In addition, in the make-up water of the expansion tank, thereby reducing air mixing. Therefore, the expansion tank cannot be too short of coolant, and the coolant level cannot be lower than the lower limit of the expansion tank.
Pressure relief means that when the pressure of the cooling system is too large, such as the phenomenon of boiling the pot, the pressure relief valve of the lid will be opened, and the system pressure will be released in time to avoid serious losses. In addition, the expansion tank can also facilitate the driver to check the life quality of the coolant, and can visually observe whether there is a lack of coolant inside.

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