Knowing the following data:

  1. The pre-charge pressure
  2. The set pressure of the safety valve
  3. The volume of water of the system
  4. The maximum operating temperature of the system

it’s possible to calculate the required volume of the expansion vessel.

Warnings

  • The water volume of the system is the one after the non-return valve or after the pressure reducer.
  • The set pressure of the safety valve must be lower than the maximum working pressure of the vessel.
  • The calculation provides only an indication of the required volume of the expansion vessel and must be verified by a specialized and authorized technician.

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