Getting my nitrogen tank today

That’s cool for your wife to give you the green light on. $5-$6K Compressor, and even cooler that you don’t take her up on it. You really don’t need to. You can actually spend half that green light budget on an Alkin Mariner, and I were to buy that new I’d get the vertical model(ok, a bit more that $3K, lol). But the horizontal model w/o shipping is just under $3K, and you get dive quality air, and fast fills. My 2004 model tops off from 3200 to 4500 in just under 5 minutes, and that thing never gets hot! Doesn’t even feel like it’s working at all. 

I don’t work for Alkin, just recently became an owner of a used one. Whenever I experience something great I just like to pass it on. If I would’ve had the extra cash laying around, knowing how well this works, I would’ve sprung for the vertical model for the ease of moving it around the garage. But all in all I’m happy to even own one.
 
300 cubic feet is 8,495,054 cc's...divided by 480 cc = 17,698 fills. So would half of that, 8,849 fills bring the 6,000 psi tank down to 3,000 psi? I'm no mathematician, but I'm pretty sure that's NOT how it works :( Wish I still worked at the plant where we used nitrogen everyday. Spent a lot of time repairing the regulators..but then, that was liquid nitrogen.........../
 
Update, so I called today to verify my delivery on the tank this Thursday. So we settled on the delivery time and the guy said “oh, one other thing I don’t know what price Martin quoted you on the tank lease ($63.00 per year) but because this is a high pressure tank the price is $534.00 per year. Needless to say I cancelled the delivery. I’m pissed. Plus that once he found out that information I should’ve been called immediately. 
 
1 time :-(



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Time to invest in a booster?

With some rigging the Altaros Booster will empty your N2 bottle below 100psi and still boost that to 4500psi.

https://www.altaros.cz/en/50-compressors



When the N2 bottle drops below 4500psi then a standard regulator will feed the 150psi inlet of the Altaros Booster and you're golden from there using a shop compressor for work.