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Originally Posted by Andrew of FoN
The statement that CO2 is under thousands of pounds of pressure is oncorrect. The average internal pressure of a CO2 tank is 850 PSI. The output of compressed air tanks for paintball is, on average, 800 PSI. You can buy various compressed air tanks with various output pressures (450 and 800). Or you can purchase an adjustable output tank. You have confused the internal storage pressure on a compressed air tank with it's output pressure.
Any regulator can handle and regulate CO2. It will not handle it as well as it would with compressed air, but it will handle it. Also, keep in mind that many of your higher priced regulators have high rehcarge rates, which means they can recover from a drop in pressure extremely quickly (50 milliseconds or less).
The CO2 should never reach above 900 PSI. Because it is self-regulating, a change in air temperature along with the consumption rate will effect the pressure. The greater the temperature, the greater the pressure. The greater the consumption rate, the lower the pressure. Now, in order to see any noticable difference in pressure through a difference in consumption rate, you would need to be firing your pneumatics extremely quicky for a long period of time. But, since this is going on a robot, you should not have to worry about that.
Now, your budget of $40 is alittle low. I will try and search around tonight for you and see if I can find anything suitable for your needs.
I hope this helps.
-Andrew
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Andrew, He may have been thinking of regular CO2 tanks which can easily reach many thousands of PSI. I have a tank in my basement for our bar style pop machine which when filled and the next month or two will run at over 1200 PSI.
Not just any regulator would work for high pressure. Pressure regulators DO have in many instances a maximum input pressure. Too high a pressure will destroy a regulator without much difficulty. Thus it must be designed for the pressure. For example, quick search on
Google look at "
Supply Pressure, Maximum"
Also, he never mentioned using this on a robot. The diagram does show a "resevoir" but this does not specifically mean a robot "reservoir".
This appears to be an idea to refill a low pressure relatively quickly from high pressure. Keep in mind that, if this is for a FIRST robot, the rules say you must use the kit compressor.
See this thread
-Mike