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is CO2 worth it

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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do u think a co2 system is worth it if my compresser can only go to 120psi and i cant get a new 1

Poll ended at Thu Dec 24, 2009 4:51 pm

yes it is worth it
2
33%
no it's not worth it
4
67%
 
Total votes : 6
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Unread postAuthor: Ragnarok » Wed Nov 25, 2009 11:18 am

john bunsenburner wrote:Hell what IS the rating on those bbq propane canisters.

People need to get this "rating applies to everything" idea out of their heads.

Rating is the working pressure a manufacturer has decided to certify a part as safe for the customer to use it at.
Therefore, many things do not have a rating - although BBQ cylinders DO have a test pressure (although, not intended for customer use*), and usually an overpressure valve.

*Self re-fillable tanks (rather uncommon, at least for me) are filled by volume or weight, not pressure.

Everything that can be pressurised can however have a "safe working pressure" (or SWP for short).
The word "rating" only applies when that SWP is one that the manufacturer has certified it for the customer to use it at.

Still, what the SWP is on a tank like that, I can't immediately remember.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: Technician1002 » Wed Nov 25, 2009 1:17 pm

Ragnarok wrote:
john bunsenburner wrote:Hell what IS the rating on those bbq propane canisters.

People need to get this "rating applies to everything" idea out of their heads.

Rating is the working pressure a manufacturer has decided to certify a part as safe for the customer to use it at.
Therefore, many things do not have a rating - although BBQ cylinders DO have a test pressure (although, not intended for customer use*), and usually an overpressure valve.

*Self re-fillable tanks (rather uncommon, at least for me) are filled by volume or weight, not pressure.

Everything that can be pressurised can however have a "safe working pressure" (or SWP for short).
The word "rating" only applies when that SWP is one that the manufacturer has certified it for the customer to use it at.

Still, what the SWP is on a tank like that, I can't immediately remember.


In the USA the working pressure of a DOT (refillable BBQ) tank is 240 PSI and the relief valve is to remain closed below 315PSI. Minimum burst pressure is 4X the working pressure. :D General rule of thumb, don't exceed the working pressure. Stay well away from the burst pressure.

On modified tanks, the certification is gone.. Modification includes welding, cutting, dents, as well as natural modification from rust.
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Unread postAuthor: bradisfun » Wed Nov 25, 2009 4:27 pm

ok thanks guys i think i will go with some sort of propane tank
i was just wondering if any tanks (like a long skinny camping stile) would have a lower "SWP" because i wanted to have one mounted on my back or some thing
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