Is the way I have my molecular sieve positioned the correct way for optimal moisture removal? Photo attached

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MarksmanPete

MarksmanPete

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Oct 10, 2022
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Washington, US
As you can see my tuxing gold runs verticle but unlike most I see run air from bottom to top I run from the top to bottom, I cant see anyone running it like me from top to bottom so I was wondering If I should change out the oriantation an run it from bottom to the top as I see most running thairs, It wouldnt take anything I already got the fill whips an adapters. Should I tip the sieve the other way around as I see everyone has it that way, Should the moisture in theory pool up at the bottom due to gravity I really have to ask I cant see anyone running it like me, Also my tuxing gold is filled with molecular sieve.
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Biohazardman, a Yong Heng and air fill station expert, laid out some basic ground rules. 1) Items to be filled (tank or gun) should be higher than everything else, make any moisture work uphill. 2) Filters vertical, air entering lowest point, heading uphill to tank or gun. Water will pool at lowest point. 3) Cooling water as level to compressor as possible, water pump will be most efficient. I tried to follow his suggestions as closely as possible, like many others, so far has been successful. My M50 gold filter has a designated entrance and exit, which aligns with correct orientation of internal three-media plastic container, your Tuxing Owner's Manual should cover any information on that. WM
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The plumbing looks good, but just as WM suggests, raise the two filters or lower the compressor below them. The first hose coming off the compressor will likely carry the most solid moisture so pay attention to where and how it sits. My setup is the same as both pictured above, except for my filters are well above the compressor. When I release pressure from the block to start the shutdown procedure it spits out the water vapor that settled in that first hose.
 
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2) Filters vertical, air entering lowest point, heading uphill to tank or gun, Makes sense. 1. Items to be filled (tank or gun) should be higher than everything else, make any moisture work uphill.? What that doesent make sense I though you can run a long fill whip say from your blue one an say you had your tank at yong heng level would that be fine?. I will also re arrange my setup with what I have in mind.
 
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My YH sets on a counter in a room off my garage. The coolant is below it on the floor. I've upgraded the pump because it must lift the water close to 3 feet. The air coming out of the YH goes up to the extra filter filled with dessicant which is above it but when the air exits that filter (through a one way valve) it goes down hill to my 45 minute SCBA tank. I fill guns from the tank (with the hose rearranged). I have never seen any indication of water in my SCBA tank or guns. I change the YH white filter after each run and check the dessicant (color changing) every few runs. It doesn't need changing often. I vent every five minutes.

I am thus not obeying all the "rules" cited. But I don't think it's important to have the air going uphill once it's dry. If my air is not dry coming out of my second filter I think that would create issues regardless. Fortunately I am pretty sure it's dry. But arranging the filters vertically above the compressor allows moisture that condenses as the air cools while being filtered to flow back to the compressor and get vented. I see moisture vapor each time I vent, particularly at 10 and 15 minutes, not so much at 5 minutes. 15 or 20 minutes is about as long as I run my YH.

Room temperature high pressure air cannot hold much water. Hot air can even at high pressure. That is why water condenses in our high pressure air as it cools. If you do not allow the condensation to flow to a vent, you will need bigger filters and will need to change them more often. I have one of those big gold Tuxing filters but I do not use it. With my arrangement I don't think it's at all necessary.

I am pretty sure the posted arrangement can work fine with enough filtering capacity (and it looks like enough to me). I think less filtering would be necessary if the filters were above the YH so you could vent the moisture as the tank fills.
 
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MarksmanPete said:
2) Filters vertical, air entering lowest point, heading uphill to tank or gun, Makes sense. 1. Items to be filled (tank or gun) should be higher than everything else, make any moisture work uphill.? What that doesent make sense I though you can run a long fill whip say from your blue one an say you had your tank at yong heng level would that be fine?. I will also re arrange my setup with what I have in mind.
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It is the first hose coming off the compressor block that seems to build/collect the most solid moisture. That is why it was advised to put the filter system up higher. It seems that that hose matters most with initial condensation and water pooling. Right now your first hose runs directly downhill to the separation filter. Orienting it uphill makes the water stay close to the compressor block, where, when you open that pressure release knob to begin the shutdown procedure, it will blow the solid water out of that line (onto your fingers and into the atmosphere). It will be a dry line at the next start-up doing it this way as well.
 
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JimD said:
My YH sets on a counter in a room off my garage. The coolant is below it on the floor. I've upgraded the pump because it must lift the water close to 3 feet. The air coming out of the YH goes up to the extra filter filled with dessicant which is above it but when the air exits that filter (through a one way valve) it goes down hill to my 45 minute SCBA tank. I fill guns from the tank (with the hose rearranged). I have never seen any indication of water in my SCBA tank or guns. I change the YH white filter after each run and check the dessicant (color changing) every few runs. It doesn't need changing often. I vent every five minutes.

I am thus not obeying all the "rules" cited. But I don't think it's important to have the air going uphill once it's dry. If my air is not dry coming out of my second filter I think that would create issues regardless. Fortunately I am pretty sure it's dry. But arranging the filters vertically above the compressor allows moisture that condenses as the air cools while being filtered to flow back to the compressor and get vented. I see moisture vapor each time I vent, particularly at 10 and 15 minutes, not so much at 5 minutes. 15 or 20 minutes is about as long as I run my YH.

Room temperature high pressure air cannot hold much water. Hot air can even at high pressure. That is why water condenses in our high pressure air as it cools. If you do not allow the condensation to flow to a vent, you will need bigger filters and will need to change them more often. I have one of those big gold Tuxing filters but I do not use it. With my arrangement I don't think it's at all necessary.

I am pretty sure the posted arrangement can work fine with enough filtering capacity (and it looks like enough to me). I think less filtering would be necessary if the filters were above the YH so you could vent the moisture as the tank fills.
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I recommend everyone open up the original nossle with a drill or upgrade the pump that supplies better nossles that dont limit inner diameter so much I got this one https://www.amazon.com/dp/B07Z2QY9S1?psc=1&ref=ppx_yo2ov_dt_b_product_details, Look at the size of the stock on bottom left corner and the one I got with my pump, My pump works really well it will still provide a steady stream half an inch or so even if bucket is lower 220 gph perfect middle ground IMO. Yea what didnt make sense to me was whatever filled should be higher than everything else shouldnt the sieve catch all the mositure? I dont know the logic behind it as the air already traveled say thru from bottom to top passed the tuxing sieve so I dont know why you would need to keep whatever you are filling higher as the air already works from bottom to top in the tuxing filter.

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You are correct that once the air has passed through the molecular sieve desiccant filter then the location of the tank really does not matter - at that point your air will have a dew point well below the actual air charge temperature, so there will be no more condensation to manage. Of course before the desiccant, it is best to have things "working up hill," but there is nothing wrong with having the compressor higher than your coalescing filter, but it should definitely be at the low point of the string of filters and lines with the desiccant above it.
 
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AlanMcD said:
You are correct that once the air has passed through the molecular sieve desiccant filter then the location of the tank really does not matter - at that point your air will have a dew point well below the actual air charge temperature, so there will be no more condensation to manage. Of course before the desiccant, it is best to have things "working up hill," but there is nothing wrong with having the compressor higher than your coalescing filter, but it should definitely be at the low point of the string of filters and lines with the desiccant above it.
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I changed my setup I used what I have it works great I filled my tank I bought a m10 female thread to male fill nipple adapter and just ran that from my yong heng with one of my fill whips I had spare an I still have another one an another adapter coming but the setup works great, I think il run the black filter under the tuxing I tried it with the fill whip it does not look like its straining it its just long enough, I filled the black one wil sieve it holds more than you think I compacted it all in when I screw it in an feel a bit of resistance I bang it against the wood chair an slowly keep turning like 1/10th turn at a time, I cut one of the cotton filters the yong heng comes with using a straight razor blade into pads about 1/6th of an inch thick, Im not concerned about moisture acid leaching an all that, One time I ran the yong heng filled my 3 liter a good 2k+ psi an just after the copper coalescing filter I opened up the black one and squeezed the filter zero moisture bone dry so I mean no worry, As well as the fact its anodized. I got a fan an mounted it to the handle with zip ties to the handle works well, I was running it today ice water didnt even get it above 55, I filled 3200 psi on a 6.8 liter to 4400. In the pictues is my setup I used to fill the 6.8 liter today I changed it a bit incorporated the black yong heng filter now im like worriedman running all 3 filters but I dont mind dry air.

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