# Sizing of Closed Expansion Tanks

## Sizing of low temperature closed expansion tanks

### Temperatures in degrees *Fahrenheit* and pressure in *psig*

- initial temperature
*50*^{o}F - initial pressure
*10 psig* - maximum operating pressure
*30 psig* - safety factor aprox.
*2*

The diagram below can be used to estimate the size of a closed expansion tank at low temperature.

For initial and maximum pressures different from above - multiply the tank size with the a correction factor estimated from the diagram below:

### Temperatures in degrees *Celsius* and pressure in *kPa*

- initial temperature
*10*^{o}C - initial pressure
*70 kPa* - maximum operating pressure
*200 kPa*

The diagram below can be used to estimate the size of a closed expansion tank at low temperatures.

For initial and maximum pressures different from above - multiply the tank size with the a correction factor estimated from the diagram below:

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