HP water/oil filter

[Taso1000]

Don,

I'm doing my low pressure moisture debulking with a membrane drier.  It will bring the dew point down to -4°F. 

A refrigerated drier will reduce down to dew points of approximately 37°F plus use electricity.  A membrane dryer doesn't (use electricity) and is cheaper.  Do I have your interest yet?   

Compression to about 4000 psi will do the next debulking in my system.  After that, molecular sieve will remove what it can.  That's as dry as I understand how to do lol.

Thanks,

Taso

[Nvreloader]

Taso

I don't completely understand all this stuff, and attempting to wrap my head around it all,
I have used these desiccant filter since I got my SB, over 18+ months ago and filling my 3 SCBA tanks about twice a month,
the first filter is just starting to show a color change, (just checked), and when not in use, the ends are connected by air line fittings,
so no outside air is available.

I would like to add another filter, from the SB, before the SCBA tanks, which are only filled to 3000/3200 psi,
each time, but not sure which one, I have a concern about any desiccant abrasive getting into the SB and air rifle etc.

Tia,
Don H

[Taso1000]

Don,

I have been buying SMC brand filters and have had good luck with them.

https://www.smcpneumatics.com/pdfs/AM_AFF.pdf

I am not sure what size silica gel particles are.  SMC has particle filters that filter to 3 micron, .3 micron and .01 micron.

You can get a new AMD150C from ebay for $69.99.  It filters to .01 micron and flows 7 cfm @ 101 psi.  The Shoebox compressor only needs .2 cfm to work.

You could add a prefilter but with such low flow needs of the Shoebox the filter element should last forever, unless you're feeding really dusty air to your shop compressor.  There are also oil mist filters if your shop compressor isn't oil free.

Thanks,

Taso

[Sfttailrdr46]

Don,

I have been buying SMC brand filters and have had good luck with them.

https://www.smcpneumatics.com/pdfs/AM_AFF.pdf

I am not sure what size silica gel particles are.  SMC has particle filters that filter to 3 micron, .3 micron and .01 micron.

You can get a new AMD150C from ebay for $69.99.  It filters to .01 micron and flows 7 cfm @ 101 psi.  The Shoebox compressor only needs .2 cfm to work.

You could add a prefilter but with such low flow needs of the Shoebox the filter element should last forever, unless you're feeding really dusty air to your shop compressor.  There are also oil mist filters if your shop compressor isn't oil free.

Thanks,

Taso

I was looking at the membrane filter earlier this morning as a low pressure pre filter aftel my Porter Cable compressor just was not sure how well they would work.

[Taso1000]

Don,

I forgot to mention, I do use gravity like you to get rid of accumulated water.  I have a couple traps and bleed valves to do so.  If you don't remove the accumulated water it will eventually make it to your bottles or guns.  Also you don't want liquid water coming in contact with molecular sieve because it will cause an exothermic reaction (creates a lot of heat) and will make your compressed air expand and go over pressure.

Back to what we were talking about:

This is the membrane drier I am using:

https://www.ebay.com/itm/NEW-SMC-IDG1-N02-Membrane-Air-Dryer-1-4-NPT-10-LPM-Air-Flow-20-C-D-P/123450891654?hash=item1cbe3f1d86%3Ag%3AY4AAAOSwRIFb0ooU&LH_ItemCondition=3

I think I paid around $90 for mine.  More information about them can be found here:

https://www.smcpneumatics.com/pdfs/IDG.pdf

They do need oil and particulate pre filtration so they don't become contaminated and stop working.

Here is the thread I created via trial and error for my Shoebox setup and for my learning about pressure maintaining valves:

https://www.gatewaytoairguns.org/GTA/index.php?topic=120744.0

https://www.gatewaytoairguns.org/GTA/index.php?topic=142737.0

Thanks,

Taso