I'm starting from zero PCP equipment and looking to figure out what will give me the cleanest air. I'm thinking (in order of most clean to least clean with the understanding that the difference between 1 & 4 might not be substantial):
1) scuba shop fill
2) nitrogen tank rented from welding supply shop
3) professional dive compressor from a reputable source
4) Shoe box or similar with appropriate filter
5) hand pump
All options would be used with a carbon fiber tank (with the exception of 5). I'm not considering a hand pump but listed it only as a point of reference.
I'm not trying to criticize any given equipment or set up but I am trying to get educated and confirm my assumptions. Why? Because I plan on getting back into PCP and would like to minimize maintenance and/or down time caused by liquid or debris in the mechanism.
Thanks for your advice!
I am partial to the N2 from the Welding Supply shop. Coming from a semiconductor fabrication background I trust bottled gas more than other sources. It will likely be cleaner and drier than other sources (and should be certified as such) since it has to be pure and dry for welding. I have 2 6K bottles and have never used air to date.
N2 will produce just a bit more power than Clean Dry Air but the amount of extra power may be imperceptible. Any time you can eliminate oxygen from the mix you also eliminate oxidation within the pressure vessel (corrosion and or rust). I shoot a lot and use about a cylinder a year. I will also say it is likely the highest price option in the long run.