Tanks Per Bank - How to calculate / design

[DanDdiver]

Regarding design of our air fill banks:
We have 11 - 3500psi bottles, and 3-4500 bottles. I was planning on having a low bank made up of the 3500's and a high bank made of the 4500's. Is there any rule of thumb for how many bottles to put into a bank? Should I look at splitting the low bank into multiple low banks? Or perhaps adding more 4500's to the high? How does one figure this out?
Thanks.

 

[mike_s]

sounds like you're doing just 2 banks.

It's better to run your compressor for extended times instead of stop/start, which is one of the purposes of the banks. With jsut 2 banks, you're going to have to run your compressor more often because when your 4500psi banks fall down towards 3000psi, they aren't any advantage and will require you to turn on your compressor more often.

I'd split the 3500psi tanks into at least 2 banks and then have the 4500's in a bank. \

I'd go with either 3 or 4 banks total with what you've got.

check this out and read it. I think it'll help you understand that having 3 (or 4) banks would be an advantage to you over all your 3500's in one bank and the 4500's in the other in a 2 bank system

http://www.divesports.com/cascadesys.htm


(maybe others will have better suggestions than mine).

 

[rjack321]

This will answer your questions
http://thedecostop.com/forums/showpost.php?p=139334&postcount=11

Personally I think you need to split the 3500 into two banks and get an additional lower pressure bank like 2200psi. Put 60+% of your volume in the LP bank. You'll wear out your compressor faster with all those HP banks. Bank volumes at LP first, HP pressures are just a "top-off". Alternatively you need not fill the 3500s all the way.

I have:
1x 300cf @ 2400
2x 425cf @ 3800
2x 450cf @ 4500

I wish I had alot more LP cylinders (like 1200-1500cf @ 2400psi) but I got all of these used and at good prices so I can't complain.