Concerning the 200 bars, we are still dealing with that problem. Here we will change the gaz environment, and want to be sure that there is no major problem with our machines.
In fact I'm checking if our actual technology is compatibe with CO2 compressing application. That mean, in case of water, formation of Carbonic acid.
So in a first approach, I tried to check data about carbonic acid compliance for all material used into the machine.
I'm looking for data on certain materials, and looking for other will be the next step as soon as we will decide the actual one will not be sufficient. It's quite easy to find litterature on carbon steels compatibility with CO2, but I have more difficulties to find documentation on polymers and electrical steels.