Max. temperature in heat exchanger
The maximum temperature allowed for the heat exchanger(s) used in the tank.
For details on the heat exchangers, see "Number of heat exchangers". And the temperature of the heating medium supplied to them should not exceed the maximum allowable value. Otherwise, the device may fail at any time.
Max. heat exchanger pressure
The highest pressure allowed for the heat exchanger(s) used in the tank.
For details on the heat exchangers themselves, see "Number of heat exchangers". And the pressure should not exceed the maximum allowable value. Otherwise, the circuit may fail or be damaged at any time.
Number of heat exchangers
The number of heat exchangers provided in the design of the storage tank.
The simplest version of storage tanks are tanks
without heat exchangers. They are designed for traditional use in the heating system — to remove excess heat, equalize the temperature characteristics and provide the system with heat in the event of a malfunction in the heater.
Heat exchangers installed in the storage tank can perform two main functions: removing heat from the tank or providing additional heating. One of the most popular options is to work as a water heater for a hot water supply system (in this case,
one heat exchanger is enough). As an opposite example (additional heating), a heat exchanger connected to a solar collector can be given. There are storage tanks that have several heat exchangers (
2 and
3 heat exchangers) and allow several additional applications at once. Anyway, the specific specialization of heat exchangers for each model should be specified separately.
Heat exchanger material
The material from which the heat exchanger installed in the tank is made. For more information on this equipment, see "Number of heat exchangers", and the materials can be:
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Carbon steel. Steel with a high carbon content has good strength and, at the same time, is inexpensive. On the other hand, it is more sensitive to corrosion than stainless steel, so the service life of such heat exchangers is shorter.
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Stainless steel. As the name suggests, this type of steel is highly resistant to corrosion. Stainless steel heat exchangers are the most reliable and durable. On the other hand, they are noticeably more expensive than similar carbon steel structures.
