Pneumatic questions, sorry!

**maddox10** · 25th July 2011, 00:47

Interesting idea. But if I look at an ali CO2 bottle, I see something like a bottle neck.

A 20 oz bottle is about 75mm diameter, but the neck narrows down to 25mm or something like that. The tread in that bottleneck is about m18 *1.5. This means a 15mm hole. I'm not a bad welder, and have welded strange things in my life, but I fail to see how I can weld in fins in a commercial paintball CO2 bottle.

On the outside, I wouldn't weld them. No firm would be willing to recertify an ali CO2 bottle with fins welded on. I would solve it with a ribbed sleeve to slide the bottle in.
But never have build a machine that had the weight nor space left for such an add on.

**Max** · 25th July 2011, 09:08

If I made the internal heatsinks I would be making the whole bottle from scratch but I doubt I'll do that but if I have the spare weight I'll make an external heat sink.
How long is the 20oz paintball co2 bottle and does it need an adapter to fit onto the on/off valve ?

**maddox10** · 25th July 2011, 09:56

A tread about CO2 bottles.

In short, if you buy a CO2 paintball tank, you have 2 options. Pinvalve or On/off valve. If you use the pinvalve, you need an adaptor with pin-pusher, and between the pinpusher adaptor-pneumatic setup, another valve that isolates the bottle-what is opened automaticly- from the rest.

Making your own storage bottle. I hope you realise that it ain't that easy if you want to comply with the PED norm.

My advice, build your machine with an on/off valved paintball bottle ,and go for the custom bottle afterwards.

**Max** · 25th July 2011, 18:07

Where can I get an on/off valve go on a paintball bottle and what are the dimensions of the 20oz co2 bottle?

**shakesc** · 25th July 2011, 18:13

Do people build their own buffer tanks for LP flippers?

You would really want flow in at one end and flow out at the other but paintball tanks flow in/out is at the same end

**Max** · 25th July 2011, 19:05

What is a remote isolation valve? Will I need one as well as an on/off valve? If so, where can I get one and where can I get an on/off valve? And also can you make a fp buffertank and how would you do it? And finally what dimensions do paintball bottles come in?

**kane** · 25th July 2011, 19:43

You only need the remote isolation valve if you use the pin valve. But don't forget your dump valve!

**jonny** · 25th July 2011, 19:54

you can make your own fp buffer tank or you could just use a commercially made co2 tank which would be far simpler/safer. i know kenny makes custom fp buffertanks but they'll be pricy. paintball tanks come in different dimensions dependent on capacity and manufacturer

**psychostorm** · 25th July 2011, 20:01

Originally Posted by kane

You only need the remote isolation valve if you use the pin valve. But don't forget your dump valve!

Sorry Kane, just to clarify. The remote isolation valve is the on/off valve for a pin valve bottle. An on/off valve bottle does not need a separate one. You will need one of these valves to stop the bottle from leaking CO2.

You will also need a dump valve, to get the CO2 out the rest of the of the system at the end of the fight.