Exchanging the process gas source

WARNING

warning

Gas source exchange

If a gas source exchange is performed incorrectly, gas leakage and poisoning of persons may occur.

  1. The gas source exchange are to be carried out by trained specialist personnel and never unattended.
  2. A pressure test must be conducted after each gas source exchange.
  3. For each gas source exchange, a new seal suitable for the used gas is to be used.
  4. Wear the personal protective equipment prescribed in the risk assessment.

With each gas source exchange, check the port for leak-tightness. We strongly recommend replacing the gasket every time the gas source is exchanged. Always turn the shut-off valves slowly and as far as the stop when opening or closing them!

 

Removing the empty process gas source:

  1. Close the process gas source valve.
  2. As the pressure control station does not have its own pressure relief device, the remaining acetylene gas present in the system and under pressure must be discharged via the consumers.
    When this pressure relief process is completed, the two pressure gauges on the pressure regulator must display the value "zero". Ensure this with a visual inspection!
  3. Depressurise the pressure regulator by turning the of the handwheel and close the ball valve in the pressure control panel outlet.
  4. Disconnect the process gas source connection.
  5. Mount the sealing nut on the gas source valve and protective cap on the process gas source.
  6. Identify, secure and remove the empty process gas source.

If hoses with an integrated check valve are used to connect the pressure control station to the cylinder valve, steps 2 and 3 can be omitted.

 

Connecting the new process gas source:

  1. Provide new process gas source, position in front of the bracket and secure using the safety chain.
  2. Remove and retain the protective cap and screw plug.
  3. Check the port thread and sealing; a new sealing must be used each time the gas source is exchanged.
  4. Screw the process gas connection onto the gas source valve by hand and tighten it gastight.
  5. Open the process gas source valve, build up pressure, and close it again. Check using leak test spray whether the process gas port is leak-tight.
  6. Open the process gas source valve.
  7. Open valve HPI. In the case of two-sided pressure control panels with manual switchover, keep the HPI valve closed, and do not open it until the supply side has to be changed again.
  8. Set the pressure regulator to the required outlet pressure in increments.
  9. Slowly open the PLI.

 

The pressure control panel is ready for supply.