“Tampon” Filters

Jump to latest Follow Reply
ChuckInOhio

ChuckInOhio

Member
Apr 16, 2017
128
29
Ohio, United States
I’d like to put a simple/cheap “tampon” filter on the HP side of my Shoebox for no other reason than capturing silicone and any other particulate that might come out as it’s doing it’s thing. I’ve seen a couple of these in-line options like the AV one on Pyramyd but I wanted to get others options on what they’re using as these things look like they have the potential to be little hand grenades if there was a manufacturing issue.

Thanks in advance!
 
  • Like
Reactions: Impact701
Haven't heard of any "hand grenades" happening with them in 8 years I've been paying attention. Years back someone showed a larger aluminum filter housing that blew but can't remember circumstances. They come with all the Yong Hengs & nobody has reported any mishaps. Get steel vs aluminum if you can. I might even have one for you. I'll PM you if I find it.
 
  • Like
Reactions: Impact701 and ChuckInOhio
Upvote 0
I use the one that came with my Yong Heng in large part because the YH spits out some oil in the air and I don't want that in the dessicant of my second filter. Works fine. Has really thick walls in the filter. Seems very sturdy. Only issue I've had is a need for a new O-ring. My GX CS2 came with a "extra" filter that is similar. Also seems very up-to-task. The CS2 doesn't spit out oil but I still use the "extra filter". I do not see water in the CS2 filter but it doesn't run long. I squeeze some out of the YH filter when it's humid out. It runs for longer to fill my 45 minute bottle.
 
  • Like
Reactions: Impact701 and ChuckInOhio
Upvote 0
ChuckInOhio said:
I’d like to put a simple/cheap “tampon” filter on the HP side of my Shoebox for no other reason than capturing silicone and any other particulate that might come out as it’s doing it’s thing. I’ve seen a couple of these in-line options like the AV one on Pyramyd but I wanted to get others options on what they’re using as these things look like they have the potential to be little hand grenades if there was a manufacturing issue.

Thanks in advance!
Click to expand...
Are you using a real "Shoebox?" I put one of those $20. 00 filters on the out put of my Shoebox for the same reasons. The pistons are lubed and some of that will get into the airstream. I checked the filter element every few weeks and changed it as needed.

That same filter is now on the output fitting of my CS4-i - for the same purpose and still doing a good job.

JackHughs
 
Upvote 0
I do that very thing with mine, and I decided to do it with the absolute smallest filter I could find - since all it is doing is stopping the small amount of lube that gets through, I don't need anything bigger.

I bought it probably about 9 years ago, and while I don't see the exact unit anywhere anymore (all seem to have gotten bigger), this one is close - the filter housing is the same, but it comes with a hose attached. If I did not have mine, this is what I would buy, and if the hose is not microbore I'd simply swap it for a foster fitting. It won't waste much air with its very small size.


If you are drying air on the input to the Shoebox, this is all you need size-wise . . . .

Edit: Adding that I just noticed that you will also need to add a male foster fitting to this unit (M10x1), and I took this post as a reminder to check the filter in mine as I only do that rarely anymore now that the Shoebox has the auto oiler - the silicone oil is less of an issue in terms of the amount of bypass than the old white lithium grease was (plus I lube with Krytox instead of plain silicone oil). There was a light amount of lube in the filter after maybe up to 100 hours of use - I did not note when I last changed it - with no discoloration from any wear of the o-rings (most likely showing the great benefit of the Krytox lube - expensive, but awesome stuff in the right application). The filter was not blocked and would still have been good, but taking it out damaged it so it was replaced - for only the third or fourth time in the many years I have used it.
 
Last edited:
Upvote 1
AlanMcD said:
I do that very thing with mine, and I decided to do it with the absolute smallest filter I could find - since all it is doing is stopping the small amount of lube that gets through, I don't need anything bigger.

I bought it probably about 9 years ago, and while I don't see the exact unit anywhere anymore (all seem to have gotten bigger), this one is close - the filter housing is the same, but it comes with a hose attached. If I did not have mine, this is what I would buy, and if the hose is not microbore I'd simply swap it for a foster fitting. It won't waste much air with its very small size.


If you are drying air on the input to the Shoebox, this is all you need size-wise . . . .

Edit: Adding that I just noticed that you will also need to add a male foster fitting to this unit (M10x1), and I took this post as a reminder to check the filter in mine as I only do that rarely anymore now that the Shoebox has the auto oiler - the silicone oil is less of an issue in terms of the amount of bypass than the old white lithium grease was (plus I lube with Krytox instead of plain silicone oil). There was a light amount of lube in the filter after maybe up to 100 hours of use - I did not note when I last changed it - with no discoloration from any wear of the o-rings (most likely showing the great benefit of the Krytox lube - expensive, but awesome stuff in the right application). The filter was not blocked and would still have been good, but taking it out damaged it so it was replaced - for only the third or fourth time in the many years I have used it.
Click to expand...
This is very similar to what came with my GX EL2. I too use it to stop gunk.

Opened it up after a years use. Trimmed off about .125" of the filter and put it back in. That was the only "contaminated" part of it...
 
  • Like
Reactions: Normkel
Upvote 0
Are you referencing this kind of little filter? Or

This one is on my Nuoge (GX CS1 clone). They use the little "cigarette filter" 10.5 diameter. Yhe larger one in the background is from my CS3, and shows the kind of dirt that I think BSJ referenced.

These filters stop liquid water quite well. I used larger versions to stop liquid water in the output of my Yong Hengs, including weighing before and after to calculate water.
1749000364629.jpeg
1749000322661.png
 
  • Like
Reactions: ChuckInOhio
Upvote 0
Normkel said:
Are you referencing this kind of little filter? Or

This one is on my Nuoge (GX CS1 clone). They use the little "cigarette filter" 10.5 diameter. Yhe larger one in the background is from my CS3, and shows the kind of dirt that I think BSJ referenced.

These filters stop liquid water quite well. I used larger versions to stop liquid water in the output of my Yong Hengs, including weighing before and after to calculate water.
View attachment 567349View attachment 567344
Click to expand...
That looks like the same unit, and yes those are the filters. They are an absorbent filter, so they are great at stopping solids and other coalesced particles, such as liquid water.

While they are good at catching water, if you have this type of filter (of any size) on the output of your compressor and are finding the media "wet" with water after use, and you do not have a desiccant filter after them before your gun or tank, then you have "lost the battle" in terms of keeping liquid water out of your reservoir as water vapor will be getting past the filter. If anyone wants to know more about how water vapor works in HPA compression, feel free to read these two back to back posts where I explained it in another post a while back: https://www.airgunnation.com/threads/moisture-in-pcp-airguns.1321274/page-2#post-1839752
 
Upvote 0
I took the tiny little absorbent filter that was inside the metal block of the CS2 under the pressure gauge out when I put the much larger "extra" filter they shipped with it onto the output of that metal block. The tiny one is, in my opinion, too small to do much about water on a compressor although I like having something on a hand pump and I think the one on my hand pump is about that size. It may work on a hand pump. I have not seen anything on my CS2 absorbent filter yet. No evidence of oil and no water I could squeeze out. I have the GX filter on it but I may take it off. If I do, the "extra" filter will be my guns only protection but when it isn't getting wet enough I can detect water in it I have trouble seeing where that is a problem. If I decide I want to just err on the side of overkill I will leave the GX filter on and may go back to the tiny little filter just for oil.

I do not see the point of two of these little absorbent filters on a compressor but I like having one first in the airflow. My YH really needs it. It comes out with obvious contamination on the inlet (never on the outlet) and gets changed after each tank fill. The YH lubricates by splash, I believe, so that means the whole inside of the pump has a constant oil vapor so it kind of makes sense some might make it to the air it is pumping. The little GX pumps use grease so it should not get whipped up into the air like that and it doesn't seem to.
 
Upvote 0
JimD said:
I took the tiny little absorbent filter that was inside the metal block of the CS2 under the pressure gauge out when I put the much larger "extra" filter they shipped with it onto the output of that metal block. The tiny one is, in my opinion, too small to do much about water on a compressor although I like having something on a hand pump and I think the one on my hand pump is about that size. It may work on a hand pump. I have not seen anything on my CS2 absorbent filter yet. No evidence of oil and no water I could squeeze out. I have the GX filter on it but I may take it off. If I do, the "extra" filter will be my guns only protection but when it isn't getting wet enough I can detect water in it I have trouble seeing where that is a problem. If I decide I want to just err on the side of overkill I will leave the GX filter on and may go back to the tiny little filter just for oil.

I do not see the point of two of these little absorbent filters on a compressor but I like having one first in the airflow. My YH really needs it. It comes out with obvious contamination on the inlet (never on the outlet) and gets changed after each tank fill. The YH lubricates by splash, I believe, so that means the whole inside of the pump has a constant oil vapor so it kind of makes sense some might make it to the air it is pumping. The little GX pumps use grease so it should not get whipped up into the air like that and it doesn't seem to.
Click to expand...
MY CS4-i does expel grease - not a lot, but enough to justify the small filter installed on the output.

JackHughs

GX CS4-1.jpg
 
Upvote 0
AlanMcD said:
That looks like the same unit, and yes those are the filters. They are an absorbent filter, so they are great at stopping solids and other coalesced particles, such as liquid water.

While they are good at catching water, if you have this type of filter (of any size) on the output of your compressor and are finding the media "wet" with water after use, and you do not have a desiccant filter after them before your gun or tank, then you have "lost the battle" in terms of keeping liquid water out of your reservoir as water vapor will be getting past the filter. If anyone wants to know more about how water vapor works in HPA compression, feel free to read these two back to back posts where I explained it in another post a while back: https://www.airgunnation.com/threads/moisture-in-pcp-airguns.1321274/page-2#post-1839752
Click to expand...
The water content @ ambient, was <10% after the paper filter. Given that is in the "very dry" range of industrial metal storage standards, I have concluded that my supply hasn't an issue.
 
Upvote 0
You must log in or register to reply here.
Top Bottom
Back
Home
Forums
Resources
Menu