Originally Posted by family wagon
That's a nice looking drier. I confess: I entirely forgot about feeding my plasma cutter dry air. I've been using an electric compressor with 60 gallon tank oriented vertically; the inlet from the pump and the outlet to the air line are both on the top. I drain the tank.. sometimes.. ;) Oh, I have a little water separator on the outlet as well, and it occasionally gets drained too.
Last time I took steel for recycling I had a receiver/dryer they wouldn't accept; they said it had to be cut open first. So back at home I cut off the end with the hoses and still have the cylinder kicking around the shop. Now I know what I should do with it!
How full do you fill the kitty litter? Does the air need to actually travel through the drying media, or would that just cause it to pick up dust?
Firs of all your plasma cutter needs dry air. It doesn't matter how big your tank is. I have huge over 100 gal receiver and I drain it (sometimes ;) )
Now some details:
1. I put plastic wire sponge (used for cleaning pots and pans) on the bottom where air enters the dryer. This keep silica inside when you disconnect your hose.
2. I filled it right up with silica.
3. I put the same plastic sponge in the top 2" pipe near air exit for the same reason to keep silica inside.
All air goes through the media, which is the desiccant.
The dust.... you do get some dust at the beginning and I just let it blow out for a bit. I keep standard filter/water separator (useless thing for removing water) on my plasma cutter and it will catch the dust.
BTW silica can be reused many times. All I need is to open the dryer (this is why I used 2" pipe and cap) pull sponge out, shake silica out, put into old cast fry pan and put it into oven for some time to dry.