New Design for a Universal Anti-Siphon Tank

[alexrusek]

Everyone knows that buying a anti-siphon tank over teh internet may be great, or could be completely wrogn for your marker.

Buying just the tube leaves you with a install.

Buy from your local shop and you may apy out the nose for it.

So what to do?

Well this is my new idea.

It will make any tank be able to go on any marker and be able to only use gaseous co2.



Anyways, inside of a CO2 valve is a 1/8" NPT threaded female connector. My idea is to put a Macroline fitting inside that threaded valve.

Then, JB weld a brass tube into the macroline connector piece so it is able to swivel in a circular motion.


After this si done, the tube has to be bent correctly.
First it is bent down, almost touching bottom of tank. Then bent up to teh top so the opening is at top of the tank.

At the lowest point on the tube, a weight should be placed.

With this setup, the bottom wil always go to bottom, forcing opening into the gaseous CO2.



Look at attached pictured to see it.

[nerobro]

Decent idea. the execution would be very difficult. the drag created by a rotating joint like that would limit the effectvieness of the tube. You also really want the gas pickup to be at the front of the tank.... Which reduces stress on the rotating joint and would make it swing more freely. (something that would help your design) and keep in mind the larger the diameter of the tank, the more effective this will be.

do a little research on joints that'll remain "loose" and have a fairly tight seal despite the rotating joint. I have some ideas.... I'd like to see what you come up with first :-)

[alexrusek]

Hit me up on AIM...If the proto turns out good I may need someone to help me market them and such.


Plus your a damn smart guy.

[alexrusek]

Re-drawn

One thing that may be a problem..how exactly does macro fittings work..does it ahve an Oring in there?

co2 has a boiling point of -56* Celsius ......Pretty Damn Cold...

[ZapTheMad]

I thinka felxible hose with some type of float would be more practical.

[alexrusek]

Macroline submerged in liquid co2 insn't gonna last long. And the float would have to be pretty big, so getting it inside of the tank would be quit a problem.

Also, Not really many materials that could wistand temperatures way below -56* C...and still float/ be flexible.

[ZapTheMad]

Macroline isn't all that flexible and only gets worse in low temps. Silicone hose is very flexible and good for -50*C to +300*C. Many plastic foams should be fine for low temp as a float. It can be a long cylinder, not just on the end of the hose.

co2 has a boiling point of -56* Celsius ......Pretty Damn Cold...

That's at atmospheric pressure. Inside your tank, the high pressure keeps it at a liquid at much higher temps. Your tank will never see -56*C.

[alexrusek]

aha yes... that temp is at 1 atm...

now...whats it gonna be at 800-1200 psi?



"That's at atmospheric pressure. Inside your tank, the high pressure keeps it at a liquid at much higher temps. Your tank will never see -56*C."

It will probably see this when being dumped at right at filling.



Where can i find some of this silicone tubing?


I amy attempt that after the brass tube idea.

Hafta remember...if the tube is gonna stay in the liquid co2 for months or yeards at a time sittin in someones room.

[ZapTheMad]

The pressure of the tank is directly related to temperature. Even when dumping the tank, it will never come anywhere close -56*C. If it did, it would not dump since there is no pressure. You would also not be able to hold it without causing frost burns. It may come down around 0*C, but that's still about 500 PSI. The liquid in the tank is at whatever temerature the tank is at. Here's a nice chart showing tank pressures at different fill volumes and temperatures.



Do a yahoo for "silicone hose". I'm sure you can find a million suppliers. Your local auto parts shop probly stocks it as well. silicone hose is known for it's durability in the automotive environment. I'm sure it can withstand long term application in liquid CO2.

Polyurethane foam can withstand -130*C to +93*C. It may be a good choice for this also.

[alexrusek]

Thank you very much..I think I'm gonna make two versions.

[CoolHand]

Have a look around for industrial macro fittings. I've seen industrial fittings that will take plastic, brass, and even steel tube ( ), leaving no need for JB weld.

The biggest bottle neck I see, is just that . . . . . the bottle neck. Once you get the whole contraption built, its still gotta go into the tank through that tiny little threaded neck.

Good luck with this, its a very simple idea, and those are usually the ones that work.

[Macpaintballer]

You take a normal antisiphon tube, and then attach a piece of round stock with a weight on one end... I just thought it might be easier working with an existing tube, and just attaching the weight and swivel-fitting to that.

[alexrusek]

You take a normal antisiphon tube, and then attach a piece of round stock with a weight on one end... I just thought it might be easier working with an existing tube, and just attaching the weight and swivel-fitting to that.

ehhh....Problem is the tube needs to go towards middle of tank.


And that would never fit through the neck.

[Chronobreak]

stil seems like alot of work when most people would stil prefer to use nitro if they can afford it....seems like alot of trouble when a normal anti-siphon works fine as long as u know the tube is facing up or get an endo cradle and have a straight anti-siphon to th back im getting another idea actually....

[alexrusek]

stil seems like alot of work when most people would stil prefer to use nitro if they can afford it....seems like alot of trouble when a normal anti-siphon works fine as long as u know the tube is facing up or get an endo cradle and have a straight anti-siphon to th back im getting another idea actually....

Yeah..Im guessing people still point their gun up even with an endo cradle...