How does an automatic room heating control valve work? Detailed answer

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How does an automatic room heating control valve work? Detailed answer

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How does an automatic room heating control valve work?

The main working element is a cartridge filled with a certain liquid. When the temperature in the room rises, the liquid expands and the valve automatically closes the access of the coolant to the radiators. If it gets colder, the liquid contracts, decreases in volume, and the valve opens up heat to the room.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

What is mercury?

Mercury is a very unusual metal that is liquid at room temperature.

Mercury freezes at -39°C and boils at 357°C. It is 13,6 times heavier than water. The surface tension of mercury is high enough that some objects sink in it. It tends to break up into tiny droplets and spread.

In nature, mercury is found in the reddish mineral cinnabar. Cinnabar is part of many rocks, but mostly rocks of volcanic origin.

Mercury evaporates easily. To obtain pure metal from ore, it is necessary to heat this ore to a temperature of about 482 ° C. The vapors collect and condense to form mercury.

Mercury in various forms has long been used by man. Before the advent of writing, cinnabar served as the basis for the manufacture of red dyes. As early as 415 BC, mercury was obtained from ore and used to coat metal surfaces and in the treatment of certain diseases. Alchemists who tried to obtain precious metals believed that mercury was a magical material. They widely used it in their experiments and rituals.

Currently, mercury is widely used in medicine. Despite the fact that mercury and its components are poisonous, it is added in the manufacture of medicines and disinfectants. Approximately one third of all mercury production goes to medicine.

Mercury is known to us for its use in thermometers. This is due to the fact that mercury reacts quickly and uniformly to changes in temperature. Today, mercury is also used in paints, dentistry, chlorine, caustic soda, and electrical equipment.

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