Flushing in the process gas to the process

Flushing in the entire line network to the process must be implemented via a waste gas valve on the process. To do this, refer to the system documentation for the process. This procedure does not apply to gases that require passivation.

1. Close all valves and fully depressurise the pressure regulator by turning the handwheel anticlockwise as far as it will go.
2. Open the process gas source valve and then the HPI and PLI valves to fill the entire area in which the process gas is to penetrate up to the process and fill it (pressure build-up).
3. First slowly set the pressure regulator step by step to a low outlet pressure.
   The process source pressure and the gas type properties are to be taken into account here.
4. Open the shut-off valve on the process. Ensure that the process gas can be discharged safely via the process.

The pressure control panel is now in a condition ready for operation.

If operation is not to be continued following the flushing process, the pressure regulator must be fully depressurised. This is carried out by turning the handwheel anti-clockwise as far as it will go.

When system operation is then started, set the pressure regulator step by step to the required outlet pressure.