The membrane tank is established in order to avoid rise of pressure in heating system which arises when heating due to expansion of the heat carrier. Emergence of membrane tank has allowed to do mounting of heating services without contact with the atmosphere, the long term of work is caused by lack of friction between membrane and wall of tank. The membrane tank also prevents boiling of water in heating services and fills up in case of leak system with water.
1. The body of membrane tank is divided flexible membrane into two parts, in one part liquid accumulates, the second contains the air or gas compressed up to the certain pressure. From heating system the heat carrier comes to one part of tank, the second part under high pressure is filled with nitrogen or air which is supported by the nipple.
2. In the passport of membrane tank data on pressure are specified, at the expense of it the volume of tank is completely engaged in not connected state with air. Before inclusion of heating system the gas pressure should be established equal to statistical pressure: 1 bar on 10 meters of water column which is above expansion tank, but in total no more than 4 bars. As soon as temperature in heating services increases, water comes to the water camera of tank of b increases pressure in tank cavity up to the general pressure of heating system.
3. The admissible volume of tank depends on values of pressure at which the pump will turn on, on the maximum number of turning on of the pump within hour and also on water analysis intensivonost. The minimum admissible volume of tank by division of two parts of expected analysis of water in hour is defined on the maximum number of turning on of the pump in hour. To prolong the term of operation of the electric motor of the pump, it is necessary to choose membrane tank which volume exceeds minimum admissible. In one system it is possible to install several membrane tanks, but pressure at the same time has to be identical.
4. Before installation it is necessary to make sure that when calculating correctly technical parameters have been determined. Buck joins the pipeline near boiler, on system it is necessary to install the safety device guaranteeing impossibility of excess of pressure. The membrane tank cannot be sorted or dismantled during operating time and also to drill out and open, applying effort.
5. Water in system circulates without impurity of oxygen or other aggressive gases - it is and prevents corrosion and also increases the term of work of heating system and pipelines.