Teardown: Inside a one way valve, non-refillable valve gas cylinder

[@georgieippolito9924]

i disassembled 3 and it was a success! i took the check valve out and now i got 2 air tanks in the car incase of a flat and the third one is filled with butane. butane doesn't make much pressure infact you could store it in a plastic bottle! i like baloon time tanks because of the weak point safety feature. if anything is gonna blow it will only make a loud pop and hiss. i use the butane tank to operate a camping stove, grill, heater. the butane is expensive in that amount to fill a baloon time tank but it lasts a very long time!

[@girlymaec11]

if you open the valve and not putting the nozzle, does the helium gas still goes out?

[@Forka137]

I suspected my tank had a check valve since it was so hard to fill. I watched the "how helium tanks are made" video expecting to see how did they fill them but they didn't show that part. It's a very clever design. Thank you, can't wait to disassemble mine.

[@tiktak212]

Did you refill your tank??

[@Graham_Langley]

Many thanks for this. I've got a one here that I was thinking of using as a low-pressure tank for charging a very small pressure vessel that's a pain do using a pump. Looks like it's possible but not as easy as I thought. Fixing the poppet valve to the threaded part, say with pin in a new hole, should work.

[@Graham_Langley]

Just done the valve here. Dumped the spring, removed the remains of the frangible pin, held the valve tight in the head and drilled a new hole in the valve shaft suitable for some 1.6mm copper wire. Cleaned up the threads (there was what looked like some kind of low-strength thread lock on mine), new silicone grease on the O-ring and reassemble. Now I've got to find some way of getting from the ¼" SAE fitting to a Schrader valve body.

[@Kakunoshin_Niitsu]

thaaaaaaaaaank you so much Sir, I was breaking my head trying to decypher what the name of the nipple was, I'm stil trying to figure out if it is 1/4 size tho and if this is a special kind of thread or what. have a good one!

[@manwiththestar2305]

That's a 7/16 JIC. Size 4 on the designation chart en.wikipedia.org/wiki/JIC_fitting

[@Kakunoshin_Niitsu]

@@manwiththestar2305 you're a life saver!

[@ToyotaKTM]

The fitting is 1/4 SAE flare, size 4. The threads are 7/16-20 straight (not tapered). They are called JIC fittings, SAE J514, 37 degree flare.

[@Kakunoshin_Niitsu]

@@ToyotaKTM thank you as well Sir

[@richardgoforth1833]

@@Kakunoshin_Niitsu I've got a 7/16 unf to 1/4 bsp convertor which works but I've decided to get rid of this valve altogether and go direct to tank. What's the thread on here its slightly larger 11.78mm diameter on outer threads.

[@nicholaswalker4205]

You are not alone in this world :)

[@dan-o9746]

I couldn't remove that pesky T valve because they had knurled the threaded part over so it can't come out any further. Pliers!

[@EpicStudz]

Dremel it out