18
7.7 Pressure ć Temperature Diagram
1
2
3
4
5
6
7
- 20 - 10 0 + 10 + 20 + 30 + 40 + 50 + 60
Relative pressure
of the pressure
gauge in relative
bar
Nominal filling
pressure in
relative bar at
20° C
Ambient
temperature in °C
3.8 relative bar at 40 °
5.5 b (
-0,
+0.2
)
Diagram of filling pressures as a
function of the ambient temperature
°C
Example: for a nominal filling pressure of 3.5 bar, if the ambient
temperature is +40°C, the adjustment pressure of the circuit
breaker on the pressure gauge will be 3.8 relative bar.
Gas
Liquid
3.5 b (
-0,
+0.2
)