Hello, Newbie question I have been searching about for hours already: I have an argon cylinder filled at 200bars at 15°C and have bought an argon/CO2 regulator advertised as being "meant to be used with 200 bars cylinders". The regulator is a brand new EWO (german brand) 120.470 (good amazon comments made me decide for this model). With the argon cylinder at 24°C ambiant temp, the gauge from the regulator reads about 208 bars from the inlet. I wonder if I should leak some argon to decrease the inlet pressure down to 200 bars or if it is safe enough to continue with this inlet pressure 4% above 200 bars. From another community I was told it is safe as this regulator should have been tested at 1.5 times the 200 bars rated pressure, which would correspond the "200(300) bars" indication in the manual. After what I indeed could check current EU regulations impose a test at 1.43 times the rated pressure. Now as I don't want to be anything else than super cautious with this 200 bars cylinder, I have tried to also have this confirmed by the manufacturer but they have not made the effort to answer. So before going further I would like to hear about your knowledge about this here. The informations gathered so far tend to indicate 208 bars at the inlet of this reducer will remain safe enough to not want to waste some argon (or cool the cylinder ) to go down to 200 bars. This situation should not be rare (hence why I'm a bit surprised I couldn't find any discussion about this), so it should also not be very likely manufacturers would design their regulators without considering a full cylinder may have a slightly higher pressure than the rated filling pressure, due to the expected temperature range.