No one can imagine how painful it is to visit the local professionals who sale pneumatic tools,
and all of them to have the same no-name garbage and to baptize them with any nationality they like,
because they are so no-name that you can easily say that they was made even in Alaska.
I almost beg to find something of quality, and they offer me identical pressure control valves with more shiny look,
a little different shape , and with one dragon sticker on it ..
At this point I started to get smokes from my ears.
I got back in my workshop, with one new inner rubber shield from the one of the two pressure valves that I have,
even if the original it was looking good.
I did install the new ( top side) and the valve continued to have problems.
At this point I started to get smokes from my ears for a second time , I payed 2 Euros for the special (dual walls) rubber shield.
Then I took the bottom body apart, at the side that is the filter, I found something looking like a plastic nut,
and I decided to turn it and see what happens. ( The valve it was dead in my eyes and so I did not had second thoughts about destroying it ).
The damn nut started to spin and it was actually a long plastic screw, by removing it I got the filter in my hand ( metallic copper pins forming a tube) , and with it , it came one one spring with a damaged tiny rubber head on it.
I just got my special cup style cutting hand tools and cut a new flange at the same diameter (from a rubber sheet),
and glue it at the top of the damaged area.
The valve works again.
Spare part cost ? one rubber round flange at 7mm diameter / 2mm height, and one droplet of super glue.
After of this success I was so happy, that I did a complete service cycle and a good cleaning of the Air compressor unit.