Is hydrogen refills cheaper than CO2?

[DeeEight]

Originally posted by Hexis
One very distinct advantage that HPA/N2 has over CO2 is that you can do a partial fill. With CO2, you have to empty the tank and in addition use more CO2 to chill the tank to get a good fill. So there is some, perhaps a lot of waste filling CO2. There is little or no waste when filling HPA/N2.

You can partial fill co2 tanks easily. Just need to learn how fast the co2 flows thru the valve. I've filled hundreds of co2 tanks and I've always known how to partial fill the tank if I wanted to.

As to emptying the tank first, well, most fields do that only because they want to verify the empty tank weight (as different tank manufacturers, materials, valve types and presence of an anti-siphon or not will vary the empty weight). You can easily and quickly chill tanks prior to filling by sticking them in a ice-water filled bucket (or a cooler full of dry ice) next to the fill station. Couple minutes in there will do the job. Al and steel tank walls will conduct down to lower temperatures in a hurry when immersed in water close to freezing temperature.

[trains are bad]

One very distinct advantage that HPA/N2 has over CO2 is that you can do a partial fill. With CO2, you have to empty the tank and in addition use more CO2 to chill the tank to get a good fill. So there is some, perhaps a lot of waste filling CO2. There is little or no waste when filling HPA/N2.

On all my marker tanks I have a sticker with the empty weight, full weight, and anti-siphon position. Before i top the tank off I hang it on the scale by fishing line and say "ok, this one needs x ounces to be full" then I add that many ounces in the normal manner and reweigh. NBD.

[trains are bad]

Look at it this way, HPA fill - click, push button, watch guage, unlick, hand over (BTW the ways its done, very very wrong, very very dangerous but a whole nother discussion).

I still want to discuss this.

[Jt$uper$tar]

someone should design a paintball gun using hydrogen and a lighter on the end of the barrel so it shot like flaming paintballs, but it woudl be very loud

[Lohman446]

Originally posted by trains are bad


I still want to discuss this.

In regards to teh danger of quick fills on HPA tanks

As far as proper way to fill high pressure cylinders, I'll look it up exactly in the morning (not at home now, late night tonight) and post it, you'll see what i mean. Someone with a dive shop though can likely do it easier, will do in AM if noone else does

[Morally0Confused]

would you want to play with the guy shooting flaming paintballs?

hey maybe i can get my scuba filled with helium then use that on my HPA
make the tank lighter!