# Electric air dusters

#### SamR

Joined Mar 19, 2019
4,409

#### SamR

Joined Mar 19, 2019
4,409

#### SamR

Joined Mar 19, 2019
4,409
Before we installed Instrument air dryers at the plant, they used Kotex Maxi Pads in a custom shop built inline filter holder. Years later the pads were still being listed in storeroom inventory. Too much trouble dragging installed pieces of equipment out to the garage to blow out plus around equipment on the bench. I just might build an air tank as it would also solve some problems of getting air out to tires around the house or on the road out of reach of the compressor hose.

#### SamR

Joined Mar 19, 2019
4,409
Yup, I had forgot about the small single charge desiccant driers. Last one I installed was a monster 20' tall dual bed autogenerating desiccant dryer for the entire plant. Most of the pneumatic instruments were gone but still used instrument air for personnel air hoods for confined entry spaces. My bench is my office and don't think the wife would be too happy if I started piping it for air supply. LOL Now if I was still using the small workroom in the garage...

#### SamR

Joined Mar 19, 2019
4,409
I use something like this except it has a clear screw off polycarbonate filter bowl with auto "float" blowdown on the bottom of the bowl. No metal guard over bowl. Small filter for 30 gal. tank. And oil-free belt driven compressor set ~90psi of 230 psi possible.

#### SamR

Joined Mar 19, 2019
4,409
Yeah but no oil to coalesce, just water vapor condensation. Never did get around to putting in tank drain float valve but hey, it's a home garage compressor, not a commercial business one.

#### shortbus

Joined Sep 30, 2009
9,646
I use something like this except it has a clear screw off polycarbonate filter bowl with auto "float" blowdown on the bottom of the bowl. No metal guard over bowl. Small filter for 30 gal. tank. And oil-free belt driven compressor set ~90psi of 230 psi possible.
View attachment 241156
That is a water separator not a dryer. If not constantly kept up by draining they just add water back into the air stream.

#### shortbus

Joined Sep 30, 2009
9,646
Might just build another scrap Freon Air Tank with hose and blowdown nozzle. Last one from 30 years ago finally got a rust pit and leaked. Thin wall Freon tanks...
Hope you already have an empty tank. My old portable freon air tank had the same problem a pin hole leak. So thought I'd just get another empty one, they don't exist or at lest not around here. So I did have one of the old type 20 pound propane tanks and there is a place on Ebay that sells an adapter fitting the screws into the valve and then has a 1/4" pipe thread to put a hose or air fitting into it.

A propane tank is made from much thicker metal than the freon tank some where between 1/8" to 3/16" thick. Plus it has a shutoff valve.

#### shortbus

Joined Sep 30, 2009
9,646
Ever tried a TP filter/drier used by paint shops?
I have one of the Motor Guard TP type filters on my plasma cutter. If you use the real dryer cartridge instead of TP you can put it out in the sun and dry it out and reuse it.

#### SamR

Joined Mar 19, 2019
4,409
The new freon tanks don't work? Didn't realize that was a problem. Used to be all you had to do was ask and they'd gladly let you have one out of the trash pile.

#### shortbus

Joined Sep 30, 2009
9,646
The new freon tanks don't work? Didn't realize that was a problem. Used to be all you had to do was ask and they'd gladly let you have one out of the trash pile.
I called every HVAC place in my area, they all said the same thing no empty tanks available they don't use them now. Didn't bother to ask why.

#### shortbus

Joined Sep 30, 2009
9,646
Every auto parts sell conversion kits.

View attachment 241243
Have you tried to get the old type valve out of a propane tank? That looks like it goes in place of the original valve, see the pipe threads with locktite on them? I didn't want to make up a special wrench to get the valve out, My tanks protective wall (don't know the real name for it) around the valve was to close to get any kind of wrench I have on it and turn it and I have about every type of wrench.

What I bought is a left hand threaded adapter that seals into the tank valve like a regular grill hose does, but it is one piece with an internal pipe thread.

#### shortbus

Joined Sep 30, 2009
9,646
Use a pipe wrench at an angle but be warned, they are tight. When slack paint the tank.
Was no way I could do it on my tank, I tried, not enough room to even get one on the old valve.

Joined Jul 18, 2013
25,998
I used a propane torch tank for my air brush compressor resevoir.
The last time I used a BBQ tank was for a pressurized coolant tank for my CNC mill.