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Old 03-21-2018, 05:02 PM   #21 (permalink)
 
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[quote=chartle;1971786]
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Where did you find this? Looks like the oxygen filter I’ve seen in the hospital.
Its a water filter housing. I bought it for about $13 on ebay but they are much more now. Its rated for something like 80 psi but I would never leave it pressurized.

https://www.ebay.com/sch/i.html?_fro...58116&_sacat=0

Filled with these. https://www.amazon.com/gp/product/B0...XR2SHYMI&psc=1
Just ordered one for $14.58 and good to 125 psi.

https://www.ebay.com/itm/Pentek-1581...cAAOSwsN9XALaf

Now to order some desiccant. Thanks for the tip.

Danny
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Old 03-21-2018, 07:43 PM   #22 (permalink)
 
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[quote=More4dan;1973607]
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Originally Posted by chartle View Post
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Originally Posted by chartle View Post
Where did you find this? Looks like the oxygen filter I’ve seen in the hospital.
Its a water filter housing. I bought it for about $13 on ebay but they are much more now. Its rated for something like 80 psi but I would never leave it pressurized.

https://www.ebay.com/sch/i.html?_fro...58116&_sacat=0

Filled with these. https://www.amazon.com/gp/product/B0...XR2SHYMI&psc=1
Just ordered one for $14.58 and good to 125 psi.

https://www.ebay.com/itm/Pentek-1581...cAAOSwsN9XALaf

Now to order some desiccant. Thanks for the tip.

Danny
I used this for some inspiration. The issue is that its sort of hard plumbed in. My thought was to use standard airline quick connects were the filter slides back and forth.

https://www.youtube.com/watch?v=G10RQ_abyUM
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Last edited by chartle; 03-21-2018 at 07:46 PM.
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Old 03-21-2018, 09:31 PM   #23 (permalink)
 
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Iím thinking if you reversed the flow direction the 40 micron filter would keep the silica out of your tools. Not sure why you would filter the inlet of the dryer.


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Old 03-22-2018, 08:14 AM   #24 (permalink)
 
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I had never heard of using water and minimal air to test pressure rating. I learned something new today!

Thanks!!
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Old 03-22-2018, 08:22 AM   #25 (permalink)
 
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I had never heard of using water and minimal air to test pressure rating. I learned something new today!


When something fails during testing with water it makes a small splash. The water doesnít compress so it canít expand rapidly if the vessels burst. Gas will compress and rapidly expand resembling an explosion if the vessel fails sending shrapnel in all directions.


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Old 03-22-2018, 08:31 AM   #26 (permalink)
 
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Iím thinking if you reversed the flow direction the 40 micron filter would keep the silica out of your tools. Not sure why you would filter the inlet of the dryer.


Sent from my iPhone using Penturners.org mobile app
Well my plan is to have sort of a filling station above where I cast, on my table saw.

The air would first come into a small filter water trap to I'm hoping catch most of the water and then into the beads through the outlet, down a 1/2" PCV pipe and out holes drilled in the sides of the pipe. I will probably shove something like a plastic scrubby into the pipe to keep the beads out. The air then goes up the filter through the beads and out the inlet with something shoved in there to keep the beads from shooting out, then into one of those cheap 1/4" plastic coiled hoses into the pot.
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Old 03-22-2018, 08:56 AM   #27 (permalink)
 
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Originally Posted by More4dan View Post
Iím thinking if you reversed the flow direction the 40 micron filter would keep the silica out of your tools. Not sure why you would filter the inlet of the dryer.


Sent from my iPhone using Penturners.org mobile app
Well my plan is to have sort of a filling station above where I cast, on my table saw.

The air would first come into a small filter water trap to I'm hoping catch most of the water and then into the beads through the outlet, down a 1/2" PCV pipe and out holes drilled in the sides of the pipe. I will probably shove something like a plastic scrubby into the pipe to keep the beads out. The air then goes up the filter through the beads and out the inlet with something shoved in there to keep the beads from shooting out, then into one of those cheap 1/4" plastic coiled hoses into the pot.
I was thinking of cutting thin slits near the bottom the down pipe and flowing down through the desiccant and into the pipe. That way the air flow will force the desiccant beads into the chamber. If done like the video and if the bit of brillo pad comes loose, the beads are headed down the air line. The air direction from the video also puts constant strain on the down tube especially if the filter plugs. It would challenge the glued joint. Pressure and flow from the outside of the tube instead of the inside would push the downtube upward into the cap.

I do like the idea of a water knockout before the desiccant dryer. If I plan to use the dryer for painting I will have to have some kind of filter downstream of the desiccant dryer too. Thanks again for the great ideas.

Danny
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Old 03-22-2018, 09:21 AM   #28 (permalink)
 
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Have you all been having moisture problems with casting? In a year or so casting with epoxy I have not. Iím not doing anything special. Just compressed air through a standard moisture trap/filter. (Iím in the Midwest so high humidity at times) I understand it being a problem in a production shop with a compressor that runs a lot (Iíve spent some time in a spray booth) but you may be fixing a problem that does not exist.
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Old 03-22-2018, 09:52 AM   #29 (permalink)
 
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Have you all been having moisture problems with casting? In a year or so casting with epoxy I have not. Iím not doing anything special. Just compressed air through a standard moisture trap/filter. (Iím in the Midwest so high humidity at times) I understand it being a problem in a production shop with a compressor that runs a lot (Iíve spent some time in a spray booth) but you may be fixing a problem that does not exist.


Iím just setting up for the first time. Iíve read where moisture may have caused some issues. No experience yet. We do have high humidity almost every day in South Texas. I also donít have a moisture trap /filter on my air system.

Danny


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Old 03-22-2018, 11:07 AM   #30 (permalink)
 
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I put an inline desiccant filter on my pot and only after 2 or 3 used it started to turn pink. I can only imagine it getting worse as summer hits and I cast in my 1890 sandstone foundation basement.

To me its sort of like a best practises kind of thing.
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