I decided to use my “collection” of fridge compressors as workshop compressor with discarded fire distinguisher bottle and pressure bottle. But none of my fridge compressors was able to start to pump air to already pressured bottle. So I used gas valve from MIG/MAG welders to ease compressor output after reaching the pressure set by pressure valve. Here is the photos and schematic.
Operation is described in schematic.
Shcematics:
Youtube video (CZ):
https://youtu.be/ZCOfIs5Zw5g?si=rwnleu1Ic-hXItYL