If you have enough firefighters, the construction of the steam heating categorically do not use the valves.From practical experience in the use of boilers, the user can draw the conclusion that they are there is not much need-and, by and large.The system shall be open and excess steam, if formed, it must go into the atmosphere.The water from time to time have to refill, but it's a small inconvenience compared to the possible negative effects of the valve, its possible faults and sealed steam system.
boiler itself, if you decide to do it yourself, ideally, should be fully cast iron.Even if the boiler is used in the manufacture of thick steel plate that is comparable
in thickness to the tank armor, then it will not guarantee the durability of the structure.
The fact that the combustion of hydrocarbons (as the same wood - is essentially the same hydrocarbons as oil) produces carbon dioxide and water.From the rest is abstracted.When exposed to water at high temperatures and some oxygen accelerates oxidation of iron and iron at times, even a very thick, "burns."Iron, in the structure has a much greater percentage of dissolved carbon, is dissolved in the iron and so if it is possible to speak, an extremely rich alloy of iron and carbon is much less susceptible to corrosion at high temperatures than low carbon iron.That is why all the furnace doors and flaps made of cast iron.
But the whole cast-iron boiler, for obvious reasons, do not succeed.Cast iron can be cooked, such as steel, but special electrodes.Steel frame can collect only the future of the boiler, to help us out in this situation can only refractory bricks.This is not necessarily a special refractory fireclay bricks, and all the mixture for fireplaces, which now have on offer.In Siberia, the local population literally hunt for the bricks of the old Russian stoves abandoned houses.The idea is elementary simple: if these bricks for decades served in a furnace or chimney old masters, they serve more than a dozen years and the new owners, it all depends on the properties of the clay from which made bricks and our ancestors knew a lot about the case.
interesting is the construction of two ordinary 200-liter drums, which is also common in Siberia.Actually boiler represented the ordinary barrel, lined the inside thereby bricks from the old Russian stoves with built-in grate and "vmazat" in this circular masonry iron door.On top of all this square was covered with a sheet of iron, resting on the clutch of the other old stove with collapsible rings for setting pots.Simple and very practical.