Why I started using a desiccant filter, and why you should too.

That sounds perfectly reasonable and sane to me especially if you already have it. The only report of corrosion I am aware of is a Benjamin hand pump that had a rusted up internal cylinder?



Regarding condensation during cold weather, I was thinking, Charles law and Boyles law, wouldn't the pressure decrease at lower temperature in the bottle creating more room for adsorbing water?
 
Awesome, thank you sir. Read the article up to down, just wish they had some kind of root cause or root cause information as it related to the compressor used. My Brocock Commander Hi-Lite is now one year old, a few fills from the Ninja 90 cu-in EZ-Bottle with the AirForce E-Chump before it self-detonated (see my post history). The remainder with the LC-110.

I'm going to create the best test-group condition I can as I live in the South East in a high humidity environment, compress from my basement, and on average the humidity here is 48-55% and will report back my findings as it relates to the LC-110 and Brocock Commander Hi-Lite using no filtering other than the default configuration of the LC-110. If I have any failures I will attempt to do root cause analysis and look for any signs of corrosion or corrosion damage.

Admittedly, I'm doing this mostly out of curiosity, because while there is data relating to corrosion and damage there is no data which indicates the fill environment or fill method. It reminds me a bit of SAE oils and the strong recommendation of one type of oil manufacturer over another in automobiles with no real science and testing outside of happenstance.

This is not meant to insult those who decide to filter, this is just an experiment in a best effort control group with clearly defined setup:

  • Humidity 45-60%
  • Top off or fill of 90cu-in tank
  • Filling of Brocock Commander Hi-Lite 480cc
  • No additional filtering in place on LC-110

Thanks again to all who have posted. If I experience damage, of any kind, that could be even slightly construed as moisture based I will report back. Ideally my hope is that I can create a failure condition of the outlined above to authortatively state that in the above conditions the induced failure was due to moisure ingress which implies a lack of comprehensive/complete filtration that would serve to aid others.
 
There is certainly nothing wrong with the best filtering one can arrange. I posted some information about filling my 97 CF Great White tank with a Yong Heng compressor elsewhere in this forum. I recently removed the valve to check the interior of the tank after topping the tank off for a year-usually topped off at around 3000 back to 4400-4500. I used a YH cotton filter ahead of a Diablo Dry Air filter on this setup. There was NO moisture in the tank when I checked it-completely dry inside.
 
Thanks, I apologize if my post above was construed as a way to sway someone one direction or another. I'm volunteering to test out if filtering is necessary in the variables I disclosed above. Honestly, the YH is a great compressor, and I'm not attempting to compare and contrast it against one or another. Here's how I view our situation:

  • Problem: Moisture ingress during air compression without 3rd party purchased filters destroys airguns
  • Hypothesis: Properly enginereed systems do not require additional 3rd party filtration
  • Control: LC-110, Brocock Commander Hi-Lite, 45-60% humidity, 90 cu-in Ninja Bottle
  • Variable: Time, humidity, chaos/entropy
  • Experiment: Compress air using the above setup until the air gun breaks, investigate for moisture-ingress based failure, report results
  • Conclusion: Pending, Intrapolation shows 12 months of no failure even after high moisture ingress of AirForce E-Pump.

The article is nice, and I'm certain there are secret key ingredients which make the Diablo Dry Air filter perform in an exceptional manner. We should equally compare and contrast the performance between the Tuxing Gold, Diablo Dry Air filter, a placebo, and a non-filtration system against the same rifles against the same measured humidity variance to conclude a result. Most importantly, I hope to find my hypothesis wrong and conclude additional filtering is indeed necessary.

All in all, I've nothing to sell, and I'm willing to potentially damage my air rifles to see the result set. I think more understanding and experimentation would eliminate the current scientific cargo cult as it relates to oil, lubrication, filtering, and compression.
 
Good points being made here. Much of my free time lately has been consumed by issues at work that are related to the current corona virus situation. Running a small business, dealing with the slowdown experienced by many of our restaurant customers, and the resultant slowdown in our service work, as well as trying to keep our employees safe while ensuring they get 40 hours a week. My business partner and I take very seriously our commitment to keep our workers earning a paycheck. The bills don't come in part-time just because the work does. I've got my ducks in a row enough to take tomorrow off and get some beaver depredation on the schedule. I'm hoping I can get my Wildcat 30 cal shooting right and use it tomorrow evening. If not, then the trusty Bullboss 25 will accompany me on my mission.

The more research I do, the more I find that a combination of condensation drying followed by desiccant drying is the norm for producing dry high-pressure air. For breathing air, there also seems to be the need for carbon monoxide and carbon dioxide removal, as well as objectionable odor and taste removal. These are not a concern for us. In addition, it seems that most of us airgunners will find themselves almost always operating in the part of the envelope that does not generate enough liquid moisture to cause concern. This is a good thing. Nevertheless, some of us will end up in the corners of the envelope where it starts to matter. This is my primary concern, for myself. I've invested way too much money in my toys to begrudge the relatively small investment in a post-compression desiccant dryer. I want to be confident I can grab my air rifles and head out into any weather conditions I want, as well as refill my SCBA tank in any weather I want. I hope that after things settle down later this year, that I can gather some data and see if I can actually tell if the desiccant is making any difference.

LMNOP, I did find some photos to share. Sorry it took so long to post them. Here are a few.

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Again, I realize that most of us may never encounter these issues; however, I believe it will be easier for me to avoid the potential for this kind of damage than it will be for me to try to figure out just when and where this kind of damage can occur and then let that dictate when and where I can shoot. Maybe this isn't the route for everybody, but it's the one I will choose for now.

Thanks again for everybody's input. I'm positive we are all learning more about our hobby as a result. A better understanding makes us all better airgunners. Ya'll take care of yourselves out there. Make smart decisions, but don't let fear rule your life during this time. Don't forget to be a good neighbor, especially to the older neighbors. Maybe this whole thing will help us relearn how to get along and look out for each other. Shoot straight, speak the truth, and be good to one another!

James
 
Much appreciated -- I'm not too worried, I store high volumes of potential energy that can quickly convert to kinect energy via endothermic/exothermic reactions. I'm typing this on a laptop battery with a design capacity of 3987 mAh, I plan on cutting the grass this weekend with a mower full of 10 gallons of aromatic hydrocarbons, and I'll probably end up reverse-burping a few cu-in of methane during the process at a high CFM when I hit some bumps :) :) :)

It's going to take time, accelerated failure tests don't produce true results. I don't mind though, through intropolation I'm 1/3 of the way there. Only two more years to go.

Shame about those rifle pics though, O-Rings show little sign of wear, significant galvanic reactions though. Almost like someone tossed it in the ocean or something. The CF tank looks exceptional though, glad they used a lubricated blade I assume? Looks like some lubrication ran off at the cut point.