When using a PEM hydrogen generator, hydrogen and oxygen gases are produced simultaneously, which is an inevitable result of its working principle. If you want the PEM electrolysis tank to output different gases, the connection pipes need to be modified. Here are three modification methods:

1. The PEM hydrogen generator outputs hydrogen gas not included oxygen.
2. The PEM hydrogen generator outputs oxygen gas not includedt hydrogen.
3. The PEM hydrogen generator outputs HHO gas, a mixture of hydrogen and oxygen. 

We have made these three connection methods into video tutorials for your convenience to modify the PEM electrolysis tank’s connection pipes to obtain the hydrogen, oxygen, or mixed HHO gas as needed. The modification is mainly to cut off or seal unwanted gas outlet pipes. The modification will not affect the PEM electrolysis tank and can still work normally.

The key to outputting different gases is how to modify the pipe connections instead of the electrolysis tank itself. The electrolysis tank still produces hydrogen and oxygen. We selectively collect one or two gases through modifying the pipe connections. The video tutorial demonstrates three pipe modification methods in detail according to needs. They are straightforward to operate and hopefully helpful to you.

1.The PEM hydrogen generator outputs hydrogen gas not included oxygen.

  1. Connect the PU tube to the water pump
  2. Fix it with hose clamps
  3. Connect the water pump to the spout of the water tank
  4. Connect the other end of the water pump to the inlet of the hydrogen generator
  5. Use PU tubes to connect the hydrogen outlet of the generator and the gas inlet of the water gas separator
  6.  Use PU tubes to connect the oxygen outlet of the generator and the oxygen gas outlet of the water tank
  7.  Use PU tubes to connect the gas shut-off valve( avoid bringing gas back when returning water)
  8. Connect the installed gas shut-off valve to the return water outlet of the water gas separator and the return water inlet of the water tank
  9. When the water level in the water gas separator reaches the letter below, open the tracheal switch valve Discharge the water to the water tank until the designated position and close the tracheal switch valve
  10. Unscrew the lid of the water gas separator
  11. Add pure water
  12. Tighten the lid
  13. Install water level sensor
  14. Before installing the plug of the water level sensor, the black plug needs to be pulled out (In a de-energized state)
  15. Connect the plug of the water level sensor to the transformer
  16. Turn on the switch, the equipment starts to work
  17. When the float of the water level sensor is above, the equipment works normally. When it is below, the equipment will stop working
  18. The piping connection is complete

2.The PEM hydrogen generator outputs oxygen gas not includedt hydrogen.

  1. Connect the PU tube to the water pump
  2. Fix it with hose clamps
  3. Connect the water pump to the spout of the water tank
  4. Connect the other end of the water pump to the inlet of the hydrogen generator
  5. Use PU tubes to connect the return water outlet of the water gas separator and the return water inlet of the water tank
  6. Use PU tubes to connect the oxygen outlet of the generator and the gas inlet of the water gas separator
  7. Use PU tubes to connect the hydrogen outlet of the generator and the hydrogen gas outlet of the water tank
  8. Unscrew the lid of the water gas separator
  9. Add pure water
  10. Tighten the lid
  11. Install water level sensor
  12. Before installing the plug of the water level sensor, the black plug needs to be pulled out (In a de-energized state)
  13. Connect the plug of the water level sensor to the transformer
  14. Turn on the switch, the equipment starts to work
  15. When the float of the water level sensor is above, the equipment works normally. When it is below, the equipment will stop working
  16. The piping connection is complete

3. The PEM hydrogen generator outputs HHO gas, a mixture of hydrogen and oxygen. 

  1. Connect the PU tube to the water pump
  2. Fix it with hose clamps
  3. Connect the water pump to the spout of the water tank
  4. Connect the other end of the water pump to the inlet of the hydrogen generator
  5. Connect the PU tube to the tee joint
  6. Connect it to the hydrogen outlet and oxygen outlet of the hydrogen generator
  7. Connect one end of the PU tube to the other end of the tee joint ,then the other end to the gas inlet of the water gas separator
  8. Use PU tubes to connect the return water outlet of the water gas separator and the return water inlet of the water tank
  9. Unscrew the lid of the water gas separator
  10. Add pure water
  11. Tighten the lid
  12. Install water level sensor
  13. Before installing the plug of the water level sensor, the black plug needs to be pulled out (In a de-energized state)
  14. Connect the plug of the water level sensor to the transformer
  15. Turn on the switch, the equipment starts to work
  16. When the float of the water level sensor is above, the equipment works normally. When it is below, the equipment will stop working
  17. The piping connection is complete

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