Quote:
Originally Posted by Qlong
The pressure in the magazine is a fraction that of the 12g cartridge
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It is my understanding that the partial pressure of CO2 gas in a pressurized vessel has more to do with the temperature than the size of the container. CO2 will exist as a gas until a threshold pressure is reached at which point it will condense into liquid state. All CO2 tanks, be they of 12g or 20oz capacity will contain a mix of liquid and gaseous CO2 when full, with the partial pressure of the gas sitting somewhere around 900 psi at room temperature.
The only way the pressure in the magazine would be lower than that in the powerlet would be if the mag contained gas only. Filling with the powerlet inverted would let gravity drain the liquid CO2 into the mag. There would undoubtedly be a change in pressure due to the increased volume so some of the liquid would be expected to flash into a gaseous state. Leaving the powerlet and the mag connected for a finite period should ensure that the gas pressure inside both vessels is equalized, while the inverted orientation would ensure that any liquid CO2 would drain into the mag (gravity works). This is why green gas or propane magazines must be filled with the source container inverted.
Hence the test video does demonstrate that CO2 may be safely contained within the ProWin magazines, provided that the temperature does not become too extreme. I'm not sure if the ProWin mags contain a burst disk; I know containers greater than some threshold value (which I don't recall) must be fitted with a burst disk (as dictated by safety laws/regulations in North America).