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At 3000 psi, a 12L aluminum SCUBA tank holds about 86.5 cu ft of air. At 4500 psi, a 12 L SCBA tank will hold 129.7 cuft.

Considering that a CS3 or CS4 will fill the 9L/97 cu ft tank, this compressor will do it also, only faster. It will be similiar to filling the tank with two CS4s simultaneously.

Well, that means that the radiator is probably already rotated. Still, I'd recommend you turn it off, pick it up, and rotate it 9 ways to Sunday, then set it upright and turn it on and see if there were any air bubbles trapped in the water loop. Bubbles of air seem to be pretty normal for...

I think you're conflating "breathable" vs "total" air. Grok sexplains it pretty concisely: To calculate the breathable versus total air volume in cubic feet (cu ft) for a 9L tank compressed to 4500 psi, we need to determine the total air volume when decompressed to atmospheric pressure and...

Great plan! I would also add... even though DW alone causes the BEST heat transfer, and it gets worse as the ratio of AF/DW gets higher (up to 50%), the temps we are daeling with a LOW as compared to a vehicle or boiler system, so even if one were to use 100% AF with zero DW, one would likely...

Yes sir, because I do it pretty quickly, so as to take advantage of the air in the system. Crack the compressor bleed valve, and air/water begin to purge. Immediately crack the bottom filter valve, and air (with a tiny amount of water) begins to purge. Let them go untll the air eqalizes, then...

Buddy, I owe you the biggest of apoligies... Went back to my thread on my CS4 setup (https://www.airgunnation.com/threads/my-gx-cs4-i.1308841/), and my measurements were more along the lines of 242 ml DW and 8 ml WW, for a total of 250ml, which is more in line with what GX told you. Had I but...

I have emptied my CS4 several times (about five, and blew all the water out with air) and refilled it. It takes about 250 (edited because I misremembered; @Kerslachon was correct!) ml. I am going by a measuring cup, not a manual.

Because you... released all the pressure! (Opening the bottom filter valve or the compressor bleed valve is the same thing, in terms of pressure, but NOT waterl). I open the compressor valve first, then the bottom filter valve, and then the upper filter valve. This way, I empty the compressor...

250~300 ml. And don't just use DW alone, as it will erode the aluminum over time. Must add either water wetter (my choice because it never freezes here) or AF 10-20% if warm where you are, (for better cooling), up to 50% if it freezes where you are. Base your calculations on 250 ml and you'll...

At 3000+ psi? LOL, no. Even if you barely cracked it, moisture in the bottom will expel quickly. Two or three SHORT bursts and all the water is gone. The compressor traps the majority of the water.

Yes, my experience on here has been similar. Have been banned from a thread because I upset an Alkin owner with a negative comment about them, mostly due to my not owning one. Ridiculous, IMO. Why not let the post stand on its own merit, and allow each reader to judge based on their...

Not adversarial at all, and it's a fair question. I consider the CS4/CS4-i at 29 lbs to be portable. The E5K2 at 106 lbs, not so much. Just my opinion, of course.

Well, my GX put 70 bar into my 9L tank in 16 minutes. (That's 3,400 to 4,500 psi) So pretty close. And I was able to watch TV while doing it. :cool:

If you're on a budget or need portability, GX CS4 or CS4-i. If you have a few extra $$ to spend, and want a faster fill but without being portable, GX E5K2 FTW.

Looks like a nice bag, but I don't need all the pockets. Went this this one on Amazon. Free shipping. https://www.amazon.com/dp/B07RT9XKNT

Dang, that thing is LOUD!!! Makes me even more pleased with my GX compressor. They are QUIET.

I'm not sure I follow your logic.... The same can be said for pressurized air at 9 bar in a standard air compressor. What matters most is what your RH is. if you think a GX compressor is "trapping" all the water from the air it moves, you'd be wrong. Even if you're bleeding every 10 minutes...

Ran my E5K2 with the GX filter the other day for about 16 minutes to top off my 9L SCBA from 240 bar to 310 bar. Bled a fair amount of moisture from BOTH the filter and the compresor at 11 minutes. My environment was about 90° F and about 58% RH. YMMV

I plan to buy 13X color changing molecular sieve and cotton ends from Amazon when the time comes. MS can be regenerated, but takes a lot of heat to do so, so may just buy in bulk and discard.