Quote:
Originally Posted by artwhim
Is your holding tank large enough to accommodate two EX-15s? If you are putting more oxy in the holding tank than you are using it might not allow the newly made oxy access. Just a thought. Did you use the tank size recommended in his directions or move up in size. The recommended sized worked well for me with one 5 lpm. There was a noticeable difference in the consistency of my flame. I've not hooked my 2 M-15s to it because I thought it might be too much for the tank size.
Not sure what torch you run. Does it happen when you are running the torch full out like when blasting a large boro gather? Or are you running a large torch with a smaller controlled flame that wouldn't need as much oxygen? I can't help but think you are making more than using and there is way more going into the holding tank than coming out.
If your torch has an inner and outer ring, while using just the inner you could keep the oxy open on the outer to see if bleeding off a bit of extra oxy helps.
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I've been using these concentrators for roughly three years with the holding tank and always had good flame chemistry, no issues etc. I am using a GTT Cheetah (15 port) and this set up runs the torch well.
All of a sudden one day after I'd been torching for about 2 hours, one of the two concentrators started making a loud thumping noise - similar to the noise your washing machine makes if the load is unbalanced. The pressure dropped and so I immediately shut them both down. Checked the filters and they were a bit dirty, but nothing horrible, so cleaned them.
A few days later, I decided to try again, hoping it was just a fluke. Again, concentrators ran well for a period of time - I think about an hour to an hour and a half, and then the same thing - thumping and loss of pressure.
Hubby came in and piddled around with them a bit, tested the hoses to make sure I didn't have any leaks, checked the holding tank, etc. Then he read up on it and decided to put the check valves in. We did that, and I hoped that would fix it, but nope - same issue - runs for a while and then boom.
The weird thing is, it appears that BOTH concentrators are doing this - not at the same time - but one OR the other will start thumping and pressure will drop. After the 4th time, both of them did it, one right after the other.
I find it odd that both concentrators would go out at the same time (I think one is 5 or 6 months older than the other, (both bought from ABR - Extreme Oxygen devices). So I keep hoping there's something else causing the problem and it's not the concentrators dying on me. But I don't know what else to check.