3500 psi compressor.


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floorit76
January 3, 2014, 06:37 PM
I have been made aware of the possible sale of a 3500 psi cascade air system. It was used by a local volunteer FD to fill scba. But their new gear is all 5000 psi, and they upgraded their compressor as well. I've been told that I can probably purchase the whole system for under $500. Including the cascade tanks, and possibly some scba tanks. This would clear the way for me to purchase a pcp rifle, since the thought of relying on someone else to fill my tanks has always stopped me before. Does anyone have experience with this sort of system? I have the 480v electricity available to run it. But little first hand experience dealing with this much air pressure. Advice?

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tallpaul
January 3, 2014, 08:03 PM
for that money i would buy it... I did

I put a couple hundred in one having the filter cylinder checked and you will need to hydro the cascades and even the scba tanks. August industries in texas helped me. I bought a scuba compressor and had a better unit drop in my lap shortly after.

My first unit was a 3750 setup and the second will do 5000 but if ya own the compressor the 3500 is fine I think. Mine run on 220 Ya will need some hoses and fittings. remember repairs and such can be expensive on these!

floorit76
January 3, 2014, 08:08 PM
Thanks for the info. About how much are we talking for the hydro testing? Do you fill for friends? Possible liability issues?

lykoris
January 3, 2014, 08:22 PM
If you have a host of hungry PCPs and were forever shooting, sure it might make sense but maintenance can be expensive.

I would get a 12L 300 bar tank and fill off that....if you get into PCPs then re-evaluate the purchase and ongoing costs of a compressor

floorit76
January 3, 2014, 08:26 PM
Thanks for your opinion.

jmorris
January 3, 2014, 08:46 PM
I don't have a bunch to add other than when I make a tank, I fill it with water then apply twice the pressure that I am going to fill it with.

Water will not compress so it it gives, it just leaks water. When you have something with "spring" like air things can react violently. That is likely the "hydro" part of the test you are talking about.

I do this mostly for compressed air that is much lower pressure that what you are talking about.

I have used air over hydraulic systems for clamps on some machines that might help you on your quest for testing in this fashion.

They can greatly increase the pressure you can get? I this example it takes 100 psi input to 1600 psi output with a 4" piston. The ones I have used have up to 8" pistons and you can get them larger.

http://www.milwaukeecylinder.com/pdfs/mc_hydraulic-pneumatic_devices.pdf

floorit76
January 3, 2014, 08:49 PM
Thanks, but I believe that hydro testing must be accompanied by certified paperwork. I'm not even certain that these tanks are out of cert yet. Hoping for some info soon.

jmorris
January 3, 2014, 09:13 PM
Yes, of you are going to have tanks filled or meet a certification you would need something else.

Kind of like having my welds certified, some are certified by me passing some test others that may be more critical are tested, every single weld, by x-ray.

I was just noting how you could test yourself with less likelihood of getting hurt, once you do have the ability to compress yourself. I assumed if you had the ability to compress to 3500 psi that you might not take your tanks in to have them tested but I like your idea better.

floorit76
January 3, 2014, 09:31 PM
I like to keep my stuff "reasonably" well maintained. Btw, I have also seen people hydro test at home with a pressure washer.....

tallpaul
January 5, 2014, 11:36 AM
I fill for a couple friends but have no reason for "public" exposure... hydro testing prices seemed to be 30-50 when I was calling.... Jmorris- you are interesting and I would like to know half of what you are forgetting! I am local and think ya ran or knew a guy or two I used to run with- a crazy bunch for sure! Making machine- making forklifts out of old trucks all sorts of projects that still make my jaw drop. I drool at yer shop pics...

tallpaul
January 5, 2014, 11:42 AM
as far as the purchase I would likely buy it- if the compressor is name brand ya could part it out and make money or get most of it back if ya are not in a super hurry. I would likely take the chance if pcp interests you. A few side benefits are using the tanks with regulators to fill tires or run air tools/nailers I can fill a tire or two a lot easier than with the lil 120 psi fill tanks for tires.

One thing to remember is guys get killed with scuba tanks in the 2-3000 psi range when they burst and the scba stuff at 3750- 4500 has even more potential destruction on hand.... what is your and your families safety and your home or shop worth?

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