Scuba tanks

[!rshpnkrckr]

Originally Posted by Pumpster

Those tanks are pressurized to about 8000 psi. Does your nitro take hold that. Ok so i guess you might need a reg.




Nitrogen tanks have something called a fill nipple so the tanks wont equalize. If the pressure against the fill nipple (output on the scuba) is less that the other presssure (tank pressure) it wont open.

Sorry Pumpster, you're wrong. The scuba tanks are not pressurized to 8000 psi. They're pressurized to 3000 most of the time, unless you get a higher rated tank. You don't need a reg. I happen to be an avid scuba diver, and i have used scuba tanks to fill paintball air tanks. Think of it as this, the scuba tank is a big tank of air, 80 cubic feet of 3000 psi. All you have to do is buy an adapter for like 30 bucks, that locks onto the scuba's valve, and has an adapter to get on a fill nipple. Then, you close the bleed valve, open the tank valve untill the pressure is equalized, close the tank valve, then bleed the extra air in the system out. Obviously since there is no compressor you cannot fill your air tank with a higher psi than your scuba tank. Your last statement is wrong because in order to equalize, the pressure against the fill nipple (output on the scuba) would be more than the internal pressure (tank pressure), causing the nipple to open. The fill nipple is a membrane of sorts, allowing equalization only one way, into the tank.

[deadeye]

So what about the type of gas to use nitro or air? Any reason or benifit to use one over the other?

[!rshpnkrckr]

comp air, don't use any of the new nitro stuff they're filling scuba tanks with. Your paintball tank is not certified to handle it, and it will probably not do so hot with your regs. There would be no benifit, there may not be any downfalls either, but i believe that nitrous is more expensive.

[DeepFreeze]

With compressed air you will get some contaimates. I have also experienced condensation from the small amount of water vapor that is associated with compressed air.
Depending on your supplier, nitrogen will be a much cleaner gas. At one tournament I attended last year the compressed air was so bad that 80+% of the electronic guns went down due to condensation and foreign particles in the air. Luckily our field (PBC) uses medical grade nitrogen for fills and does not charge outrageous prices for fills.
Also, do not confuse nitrous (Nitrogen oxide) with nitrogen. Nitrous is highly flammable. Nitrogen is an inert gas and is not flammable.

[!rshpnkrckr]

I was referring to the new gas they're using to fill tanks for deep long dives.

[deadeye]

O.K. Deep is there anyplace local that will fille nitro in a scuba tank?

[ShadowWalker]

Probably not, you'd need to rent a bulk tank from a Gas company (we have BOC here)

[Pumpster]

We have holox but the problem with that is that your going to need a fill station with a regualtor on it.

[deadeye]

I have seen a father/son team using a scuba tank for refills, there were shooting mags. The father told me they use it all the team and swears by it. He was using HP air; what are the side affects if I do this and have it filled at a scuba shop? What should I specify when I do this, is there such a thing as asking for dry air?

[!rshpnkrckr]

Pumpster, you do not need a regulator. There is no such thing as a scuba tank that puts out 8000psi. I don't know where you got that from but it's wrong. Even NASA's tanks that hold liquid nitrogen and oxygen are 5000-6000psi. When you get bigger than little paintball tanks, it's hard to have a safe tank hold that much.