After reading Vance Harlows great book Oxy Hackers Companion, I decided to try using my compressor to recover the helium from the end of a tank. I used an O ring, a garbage bag, an old snorkel and some duct tape and attached the flexible snorkel end to my compressor inlet, the other end inside the bag taped in place. The transfill whip with DIN connector went to the other end of the bag and I filled it with HE.
I drained my towers down so I could gauge when the HE was getting through. It took about 30 seconds to get the helium to the tank. I used an O2 tester to tell me when the he started flowing. I filled the 63cuft tank to about 2200psi from a helium tank that only had less than 400 psi. One miscalulation I made was how long for the air to flow after. Since after the HE ran out I dumped the remainder to a tank that had air in it (about 1500 psi) I assumed it would take 30 seconds for the he to clear the circuit. After filling the dump tank I analyzed the O2 and found about 19% That tells me about 10% helium got through into the AL 80. Next time I will use my O2 tester to decide when to stop the HE fill.
My end result on this fist run was about 95% he at 2200 psi that I was going to send back to the gas supplier.
Thanks Vance you just saved me $15.
I drained my towers down so I could gauge when the HE was getting through. It took about 30 seconds to get the helium to the tank. I used an O2 tester to tell me when the he started flowing. I filled the 63cuft tank to about 2200psi from a helium tank that only had less than 400 psi. One miscalulation I made was how long for the air to flow after. Since after the HE ran out I dumped the remainder to a tank that had air in it (about 1500 psi) I assumed it would take 30 seconds for the he to clear the circuit. After filling the dump tank I analyzed the O2 and found about 19% That tells me about 10% helium got through into the AL 80. Next time I will use my O2 tester to decide when to stop the HE fill.
My end result on this fist run was about 95% he at 2200 psi that I was going to send back to the gas supplier.
Thanks Vance you just saved me $15.
