Author Topic: Yong Heng Compressor Post Dryer  (Read 304 times)

steveoh

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Yong Heng Compressor Post Dryer
« on: October 09, 2018, 07:10:58 AM »
I have been fretting that my Yong Heng compressor is putting moisture in my tanks and airguns. So I ordered a filter / dryer. We’ll see if it works. One thing for sure is this thing is heavy!


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sixshootertexan

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Re: Yong Heng Compressor Post Dryer
« Reply #1 on: October 09, 2018, 07:34:30 AM »
WoW Silica, sieve, and charcoal? 
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steveoh

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Re: Yong Heng Compressor Post Dryer
« Reply #2 on: October 09, 2018, 07:56:56 AM »
WoW Silica, sieve, and charcoal?

Yup. Does it work? We shall see!
  • Benicia, California
Quackenbush .58 Outlaw
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Vallejo Ferry Schedule
Sam Yang 909s .45
Sam Yang Sumatra .25
RWS Diana 350Magnum Compact Pro .22
QB-79 .177
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Diana Model 27 (childhood airgun)
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Alan

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Re: Yong Heng Compressor Post Dryer
« Reply #3 on: October 09, 2018, 08:23:50 AM »
One of the issues with using a high-pressure (post) drier is its internal volume. In my case, both of the guns I use regularly, can be filled to 4,500 psi. Typically, I run them down to about 2,500 psi before I refill them. I use an Omega Air Charger, and it takes about 10 minutes of pumping, before it starts raising the pressure in the airgun's tanks due to the internal volume of the dryer. Once the guns are filled, half of the compressed air is lost when the line is vented to the point the Foster fittings can be removed.

Because of this issue, I use a home-made pre-dryer. I'm in the process of redesigning the dryer, so more surface area is exposed. The pre-dryer is connected to the inlet port of the Omega. I have posted a short article with a photo of the first attempt on this sub-forum for those interested. As soon as I finish the new version, I'll post it too.

The question remain... Does the pre-dryer work? Yes!
  • Roswell, New Mexico
Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

steveoh

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Re: Yong Heng Compressor Post Dryer
« Reply #4 on: October 09, 2018, 09:27:30 AM »
One of the issues with using a high-pressure (post) drier is its internal volume. In my case, both of the guns I use regularly, can be filled to 4,500 psi. Typically, I run them down to about 2,500 psi before I refill them. I use an Omega Air Charger, and it takes about 10 minutes of pumping, before it starts raising the pressure in the airgun's tanks due to the internal volume of the dryer. Once the guns are filled, half of the compressed air is lost when the line is vented to the point the Foster fittings can be removed.

Because of this issue, I use a home-made pre-dryer. I'm in the process of redesigning the dryer, so more surface area is exposed. The pre-dryer is connected to the inlet port of the Omega. I have posted a short article with a photo of the first attempt on this sub-forum for those interested. As soon as I finish the new version, I'll post it too.

The question remain... Does the pre-dryer work? Yes!

The time required to fill the filter has had me concerned. 20 mins is long, and means that I'll have to add more ice to my bucket for cooling.  I wonder if this filter might work better as a pre filter. Hmmmmm
  • Benicia, California
Quackenbush .58 Outlaw
Shooting Chairs
Vallejo Ferry Schedule
Sam Yang 909s .45
Sam Yang Sumatra .25
RWS Diana 350Magnum Compact Pro .22
QB-79 .177
Crosman 1322
Crosman 1377 - HoRodded 10 FPE
Diana Model 27 (childhood airgun)
Tolman Skiff
Airgun Giveaway

sixshootertexan

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Re: Yong Heng Compressor Post Dryer
« Reply #5 on: October 09, 2018, 09:54:08 AM »
I got the same type of thing. I made a predrier  using the silica (w/blue indicator beads) and a drier using sieve between the tank a shoebox. It takes 10-15 minutes to get the line pressure up to the tank pressure.
CCS 2300, CCS 2400, Custom Built Regulated .25, Custom Built PRod Clone, .308 Bullet shooter, XS46U .177, Custom regulated .177, 850 Hammerli .177

steveoh

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Re: Yong Heng Compressor Post Dryer
« Reply #6 on: October 09, 2018, 09:57:44 AM »
With the stock tampon holder on the low side, I notice I get a bit of oil blow by. So most certainly I want the low side filter to stop that.

I wonder what all these new "portable" compressors are using to filter, or are they?
  • Benicia, California
Quackenbush .58 Outlaw
Shooting Chairs
Vallejo Ferry Schedule
Sam Yang 909s .45
Sam Yang Sumatra .25
RWS Diana 350Magnum Compact Pro .22
QB-79 .177
Crosman 1322
Crosman 1377 - HoRodded 10 FPE
Diana Model 27 (childhood airgun)
Tolman Skiff
Airgun Giveaway

d_boom

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Re: Yong Heng Compressor Post Dryer
« Reply #7 on: October 10, 2018, 06:14:46 AM »
I am concerned about moisture in my air guns causing damage.  In Kansas we have flooding from
large amounts of rain this week, but I am high and dry.  I do not have my air tanked refilled when
the humidity is high.  Will a pre-dryer remove ALL of the water from the air to be compressed or is
additional water condensed at high pressure (4,500 psi)?  My understanding is - at higher air pressures
less water can be adsorbed into compressed air.  If this is true, then there will be water condensing
out of air at higher pressures, even using a pre-dryer?  My question is: will a pre-dryer replace the
need for moisture removal on the high pressure side of the compressor?   

The guy who hosts our weekly shoots provides all of us with high pressure air, a greatly appreciated
service.  His compressor has a condenser and dryer on the high pressure side.  I inquired if he was
interested in a pre-dryer.  Since his basement is air-condition, removing moisture, he did not see a
befit.  The compressor and dryer are carefully maintained, with the condenser drained every time the
compressor is run. 
  • Wichita, Kansas

Alan

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Re: Yong Heng Compressor Post Dryer
« Reply #8 on: October 10, 2018, 09:21:04 AM »
How much water remains, depends on the drier device in use. For low pressure use (≈150 psi), mechanical dehumidifiers (refrigerators in reality), can virtually remove 99%.

Desiccants (like silica gel) can do almost as good, as long as the desiccant isn't depleted. Proper drying requires a large amount of surface area, and the more surface area, the more efficiency they can be. The simple home brew one I made turns from blue to pink in about 5 fillings from 2,500 psi to 4,500 psi. It contains about 3/4 cup of silica gel. It takes about 5 minutes in the microwave to dry it back out. Incidentally, silica gel is reusable hundreds of times. Some of the other materials often used, like calcium chloride, don't work very well, and are a real mess to deal with over time. By the way, calcium chloride is what is used in most PCP-rated, high-pressure dryers. It is one of the reasons they aren't rechargeable.

Static driers (the one which look like an automotive gasoline filters) aren't very good, but they're better than nothing.

There is one alternative—dry nitrogen. Once you buy the gauges, hoses, etc., a tank refill will last a 100 or more airgun refills (depends on the pressure preset). I'm not into dry nitrogen, but some of the guys here are, and they're the ones to ask about its efficacy.
  • Roswell, New Mexico
Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

d_boom

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Re: Yong Heng Compressor Post Dryer
« Reply #9 on: October 11, 2018, 06:13:11 AM »
I had quit using my Hill hand pump with a dryer for the air intake, because I was concerned about the
dryer's efficiently removing most of the moisture.  I don't know what desiccant the Hill hand pump uses
probably not silica gel as the beads provided are to be replaced.  Since silica gel is so effective removing
moisture, I will convert the dryer over to Silica gel and keep the Hill hand pump as a backup.  THANKS
you have address my concerns.  Danny
  • Wichita, Kansas