Leak rates of the valves

The leak rates of the valves are determined in the leak test and stored in the CE control unit.

Limit values for leak rates

The maximum values for the leak rates are:

Leak rate

Maximum value [mbar*l/s]

1 Filling and pressure relief valves

0.7

2 engine shutdown valve

0.35

3 engine shutdown valve

0.2

4 Pressure regulator

0.04

5 Pressure regulator

0.3

Values greater than the specified maximum values indicate a faulty valve.

Meaning of the leak rates

 

Leak rate 1: Filling and pressure relief valves

Leak-tightness of the following valves:

- Valve for filling/extraction gaseous
Valve for filling/extraction liquefied
- Pressure relief valve

Leak rate 2: Engine shutoff valve

Check of the volume between filling / extraction valve gaseous and engine shutoff valve.

Leak rate 3: Engine shutoff valve

Check of the volume between engine shutoff valve and pressure regulator.

Leak rate 4: Pressure regulator

Check of the volume between pressure regulator and engine shutdown valve.

Leak rate 5: Pressure regulator

Check of the volume between pressure regulator and the airblower valves.