Rusty cylinders-need help!

[Gone for diving]

Temp range for silica isn't so good and cant get down as low as alumina.

So can alumina be oven dried?

 

[Cio]

Did you notice that they can achieve a pressure dewpoint of 37-41 deg F? This is entirely inline with what I have been saying. An expert such as yourself must have some air tests that have been returned to you. Mind posting one?

Are you using a refrigerated dryer?

 

[BRT]

Are you using a refrigerated dryer?

Yes, I added one when I got little rust spots after transporting tanks through cold weather.

 

[Cio]

So can alumina be oven dried?

Not sure what you are asking.
The alumina itself can't be over dried but the use of alumina often is over drying the air.
Let's say you need -5F dew point air. Your alumina is going to give you between -60F and -40F dew point air which is over drying but you don't have much of a choice because of the properties of the available drying equipmemt. You could mix the air with a control system but that would only male sense if you required large quantities.

 

[Cio]

Yes, I added one when I got little rust spots after transporting tanks through cold weather.

No one in the breathing air industry would use refrigerated dryers on SCUBA or any high is pressure breathing air system. As I said, not because of the breathing air spec.

Does your equipment produce "breathing quality" as per the spec you referred to? Yes it does.

Because your equipment is not set up as per the industry standard you get corrosion in your tanks. If a professional sold you this setup, you were misled by someone who doesn't know what their doing. If you took it upon yourself to set it up this way, you did it wrong. Not the worst wrong you could do, you wouldn't hurt yourself from your setup but you have caused a corrosive environment for your equipment to degrade in.

 

[Gone for diving]

Silica gel, put it in a tray in the oven for 6 ish hrs and it ready to be used again,
Does alumina dry the same way?
or is it more fussy?
PS my compressor is not conventional,
and do my drying differently,,,

 

[BRT]

No one in the breathing air industry would use refrigerated dryers on SCUBA or any high is pressure breathing air system. As I said, not because of the breathing air spec.

Does your equipment produce "breathing quality" as per the spec you referred to? Yes it does.

Because your equipment is not set up as per the industry standard you get corrosion in your tanks. If a professional sold you this setup, you were misled by someone who doesn't know what their doing. If you took it upon yourself to set it up this way, you did it wrong. Not the worst wrong you could do, you wouldn't hurt yourself from your setup but you have caused a corrosive environment for your equipment to degrade in.

Still convinced that scuba air at 3500 has a -60 f dewpoint?

 

[Cio]

Still convinced that scuba air at 3500 has a -60 f dewpoint?

I am convinced yours is not.

 

[Cio]

Silica gel, put it in a tray in the oven for 6 ish hrs and it ready to be used again,
Does alumina dry the same way?
or is it more fussy?
PS my compressor is not conventional,
and do my drying differently,,,

You can just pass dried air over it at lower pressure and it will regen. Look up PSA dryers.

 

[BRT]

I am convinced yours is not.

Still convinced scuba air at 3500 has a -60 dewpoint?