So it's hot as hell here in Texas now. By late afternoon humidity is below 50% but dew point is usually 70-75degrees. I run my fill thru two filters and am wondering what does the dew point do at 250bar when I bring my tank inside and it cools down to a/c air. Does the moisture fall out or what happens. I normally shoot 200bar Olympic target pistols so I can fill the tank up in winter and go all year. Now I've bought an impact m3 and I'm getting close to having to refill my great white tank. Should I bee concerned? Thanks
Dew point, humidity and pressure
- Thread starter rettdad
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You have to filter the air going into the great white so that moisture doesn't condense inside your tank. It has an aluminum liner that can be damaged my moisture. But if the air going into the tank is properly filtered as it is filled, the tank will not have condensation in it. High pressure air cannot hold much moisture unless it is hot and it will not stay hot when it's in the tank. So we have to make sure we only fill with dry air.
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It wouldn't matter if the dew point was 20F. Inside the pressurized tank if you took that air at a dew point of 20F and magically compressed it without any loss of water, you would have a ton of water sloshing around in the bottom of your tank at any temperature you can experience in Texas, indoors/outdoors/ac/winter/summer doesn't matter. Look up steam tables and learn to read them if you want more detail. Quick example, at 300 bar and 20C(68F roughly), the dew point that equates to 100% humidity is approx -44C(about -47F) any warmer and water condenses, at 200 bar and 20C, the 100% humidity dew point is about -40C.
The real question is on the high pressure side of your pump, do you have a moisture separator that works really well, and a molecular sieve filter after that which is properly designed and used. Has to be on high pressure side of pump, and the pressurized air is hotter than ambient so can hold more water that won't condense, that is what the molecular sieve is for after the water separator.
The real question is on the high pressure side of your pump, do you have a moisture separator that works really well, and a molecular sieve filter after that which is properly designed and used. Has to be on high pressure side of pump, and the pressurized air is hotter than ambient so can hold more water that won't condense, that is what the molecular sieve is for after the water separator.
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