A dedicated Yong Heng subforum?
- Thread starter Chickenthief
- Start date
We keep our compressor threads here.
https://www.airgunnation.com/forum/accessories/air-tanks-pumps-compressors-filters/
Edited and Current 3/28/22
Here is my standard post to all things Yong Heng hope it is helpful.
The Yong Heng "Simple" version least expensive does not have a water separator you need one.
If you messed up and got the “Simple” version you can get parts on Aliexpress to add it for <$40 or you can spend much more on a decent water separator and filter.
The "Auto Stop" version shuts off near 3000psi probly not a good thing for most people.
So you likely want the "Hardcover" or "Set Pressure" versions your choice on the 110V or 220V.
The 220V will run approximately 15% faster here in the USA as we run our 220V at 60hz instead of the 50hz found elsewhere. This may or may not be a problem depending on the compressors environment and cooling.
There is now a new Digital version of the Yong Heng out. I know little about it as it has not been around long enough but there is a review available and it looks to be a better unit than the “Set Pressure” model. The poor quality gauge, with the adjustable dial, on the Set Pressure version that failed every year or so, has been replaced by a digital readout that gives much more information.
Review on the New Digital unit;
https://www.youtube.com/watch?v=rR0cdENjV8s&ab_channel=TargetForge
New "Smart Digital Version" 110V here
https://www.aliexpress.com/item/32863018900.html
New Digital version 220V
https://www.aliexpress.com/item/32815880523.html
I am aware that shipping has gone way up and this is no longer the least expensive place to buy the YH but it will show you the different models so you know what to look for elsewhere.
https://www.aliexpress.com/item/32824234795.html
Amazon now has a decent price and free shipping.
https://www.amazon.com/YONG-HENG/s?k=YONG+HENG
The compressors come with an assortment of o-rings and seals that are the most commonly used. So you should not need a reseal kit anytime soon.
Teflon tape is NOT used anywhere on the Yong Heng.
You should check the tightness of all of the fittings and lines when you get it. That will save you from having to replace any seals right away.
The early teething problems with the pistons was taken care of years back so, they are very seldom a problem these days.
Make sure you fill it with oil before you fire it up and after you do any werq to it that requires draining the oil.
Make sure you have the water reservoir plumbed and the pump turned on before you start the unit.
ISO 46 may no longer be recommended although I used it for a year without failure. I am currently using the Husky Brand Synthetic or synthetic blend oil, found at Home Depot, for two years now without a problem. Top it off to the red circle in the sight glass. This oil is clear so you can see when it gets contaminated.
https://www.homedepot.com/p/Husky-16-oz-100-Full-Synthetic-Compressor-Oil-018-0083H/300135698
I have heard of several compressors being badly damaged or destroyed by detonation. I would have to agree with heavy-impact's conclusion of low flashpoint oil getting past the rings of the first stage piston and into the second stage cylinder where it is ignited by high compression. So, using a high flashpoint oil, specifically made for high compression compressors, is likely the best insurance against this. This oil was suggested in another thread. It is a bit spendy but a quart will do three of your likely yearly changes so it’s not that bad.
https://filtertechs.com/shop/oil-media/compressor-oil/cl-581812-lq/
Never start them under pressure. I should have put this in here sooner.
Give them a dedicated 15amp outlet 20 would be better. They draw a bit of juice on startup especially the brand new ones. Don’t Use an extension cord unless it is short and has an honest 15+ amp rating. Preferably 12ga wire so you will not have problems.
Don't push your air fill past the compressor’s spec which is 4350psi. A little less is usually better than the max, and the Yong Heng should last for years unless you get a bad one.
I do not fill past 4200psi as when I do, all too often, I blow a burst disc. This may not happen on the first or second fill but soon thereafter it will.
I actually found a restriction in my Tuxing filter that was causing the ruptured burst discs. I can now fill to 4350 or so without problems.
I now have two YH compressors bought the second as a backup for the first as I fergot to turn on the coolant pump several times and overheated the first until it smoked. It did not like it but it continued to run just fine. Still I did not trust it after that. I added a switched outlet, to the system, so it turns the pump on before the compressor will power up to keep me from doing that from now on.
The second one, my back up unit, died in about two months bad QC from the factory. Cost me $12 for a new second stage piston and an hours’ time to replace it. Then to add insult to injury I fergot to put oil in, the latest unit after I put it back together, and ran it for several minutes without any. So I filled it with oil and it fired up and somehow still werqs fine. A testament to the oil it had in it before. The #1 unit that, I was worried about cuz I overheated it so many times, just kept on filling my guns and tanks till I got #2 repaired. The #1 unit got retired because it had the weak old style piston in it that was overdue for failure. I will replace that someday and have another good compressor.
The temperature sensor only measures head temperature so running it much over 20-30 minutes can overheat the motor and other parts even if ice is used in the coolant. Ice or a container of it, in the coolant, is a good idea especially if you are like me and do not use the full five gallons of water as suggested in the manual.
Keep your water supply level with the compressor to be kind to the pump and assure a good supply of coolant goes through the compressor.
On a sealed system, both coolant lines submerged you do not need to keep the reservoir and compressor at the same height.
I recently started using this Red Line water treatment after I noticed algae growth in my 2.5 gallon water bucket every few months. It seems to have stopped or significantly slowed the algae growth. I will know more in a few months.
Three months has gone by with no discernible algae growth so the water treatment werqs for that long anyway.
https://www.autozone.com/antifreeze-radiator-additives-and-windshield-wash-fluid/coolant-water-wetter-additive/red-line-water-wetter-super-coolant-12oz/486218_0_0
Keep your moisture filters, guns and tanks being filled above the compressor to help keep the moisture out.
Purge the system of moisture, using the screw valves on both sides of the compressor, for a couple of seconds every five minutes while in use.
Change out your small YH filter every twenty minutes and set the old one out to dry and reuse later.
Add a better filter if needed to be sure more moisture and any oil smell is removed from the system. Many of us use this Tuxing three media filter although, if you feel the need, you can change media types at any time.
https://www.aliexpress.com/item/32891898253.html
A smaller one will probly do for some.
https://www.aliexpress.com/item/4000960926898.html?spm=a2g0s.9042311.0.0.2a034c4dL0nrJU
Possibly a filter similar one of these, in addition to your desiccant filter, if humidity is high in your area and your desiccant filters have to be replaced often.
https://www.ebay.com/itm/30MPa-High-Pressure-Air-Filter-Oil-Water-Separator-For-Air-Pump-Air-Tank/402600939671
https://www.aliexpress.com/item/33032569946.html?spm=a2g0o.productlist.0.0.56fc60ccm8gTGq&ad_pvid=20210607072408105818162084010006558357_1&s=p
Bleed the pressure before you turn the unit off and let it run a few seconds to get the better part of the moisture out of the system. I have found that I blow less burst discs if I bleed before shutting down so I do this religiously.
Let the coolant pump run for a few minutes after shutdown to cool things off.
I run the compressor in my 65 degree basement with humidity levels between 55 and 65%. Your purging times, filter and cooling requirements may be different than mine if your humidity levels and temperatures are not the same.
Edit New Pic;
I now use a fan blowing through the back of the compressor this radically reduces the temps and extends filling times.
Just Yong Heng Info
In the manual the recommended amount of water in the reservoir is 5gal. Good for ten to twelve minutes or so of runtime with the stock system, depending on your compressors environment, before you will need to shutdown to avoid an overheat.
Distilled water is not a good thing to use as it will eventually cause pitting in the aluminum parts exposed to the water.
Plain filtered water will cool better than water with antifreeze added. If you want less corrosion use Water Wetter. It will cool better than plain filtered water and give you some protection from corrosion as well.
Although in my testing using watered down antifreeze 80% water 20% antifreeze vs Water Wetter I did not see too much of a difference in temperature.
Too much filter volume will cause one to have less fill time before the required shutdown so it will take longer to fill. But then again you will need to use the appropriate filter for the environment you are in. So, those in higher humidity areas will naturally have a bigger filter and less filling time.
Although Teflon tape is NOT used on the Yong Heng itself. It may be used on some NPT fittings not on the compressor itself. I have found that the Blue Lockight also werqs for this purpose.
You can use one way valves and shutoffs to keep the pressure in the larger filters to keep fill times shorter and lengthen the life of some compressors that have short lifespans
Info on the radiator install.
https://www.airgunnation.com/topic/yet-another-yong-heng-mod/?referrer=1
Here is a video on how to fill a SCBA tank.
https://youtu.be/_grx5p_R8D4
https://www.airgunnation.com/forum/accessories/air-tanks-pumps-compressors-filters/
Edited and Current 3/28/22
Here is my standard post to all things Yong Heng hope it is helpful.
The Yong Heng "Simple" version least expensive does not have a water separator you need one.
If you messed up and got the “Simple” version you can get parts on Aliexpress to add it for <$40 or you can spend much more on a decent water separator and filter.
The "Auto Stop" version shuts off near 3000psi probly not a good thing for most people.
So you likely want the "Hardcover" or "Set Pressure" versions your choice on the 110V or 220V.
The 220V will run approximately 15% faster here in the USA as we run our 220V at 60hz instead of the 50hz found elsewhere. This may or may not be a problem depending on the compressors environment and cooling.
There is now a new Digital version of the Yong Heng out. I know little about it as it has not been around long enough but there is a review available and it looks to be a better unit than the “Set Pressure” model. The poor quality gauge, with the adjustable dial, on the Set Pressure version that failed every year or so, has been replaced by a digital readout that gives much more information.
Review on the New Digital unit;
https://www.youtube.com/watch?v=rR0cdENjV8s&ab_channel=TargetForge
New "Smart Digital Version" 110V here
https://www.aliexpress.com/item/32863018900.html
New Digital version 220V
https://www.aliexpress.com/item/32815880523.html
I am aware that shipping has gone way up and this is no longer the least expensive place to buy the YH but it will show you the different models so you know what to look for elsewhere.
https://www.aliexpress.com/item/32824234795.html
Amazon now has a decent price and free shipping.
https://www.amazon.com/YONG-HENG/s?k=YONG+HENG
The compressors come with an assortment of o-rings and seals that are the most commonly used. So you should not need a reseal kit anytime soon.
Teflon tape is NOT used anywhere on the Yong Heng.
You should check the tightness of all of the fittings and lines when you get it. That will save you from having to replace any seals right away.
The early teething problems with the pistons was taken care of years back so, they are very seldom a problem these days.
Make sure you fill it with oil before you fire it up and after you do any werq to it that requires draining the oil.
Make sure you have the water reservoir plumbed and the pump turned on before you start the unit.
ISO 46 may no longer be recommended although I used it for a year without failure. I am currently using the Husky Brand Synthetic or synthetic blend oil, found at Home Depot, for two years now without a problem. Top it off to the red circle in the sight glass. This oil is clear so you can see when it gets contaminated.
https://www.homedepot.com/p/Husky-16-oz-100-Full-Synthetic-Compressor-Oil-018-0083H/300135698
I have heard of several compressors being badly damaged or destroyed by detonation. I would have to agree with heavy-impact's conclusion of low flashpoint oil getting past the rings of the first stage piston and into the second stage cylinder where it is ignited by high compression. So, using a high flashpoint oil, specifically made for high compression compressors, is likely the best insurance against this. This oil was suggested in another thread. It is a bit spendy but a quart will do three of your likely yearly changes so it’s not that bad.
https://filtertechs.com/shop/oil-media/compressor-oil/cl-581812-lq/
Never start them under pressure. I should have put this in here sooner.
Give them a dedicated 15amp outlet 20 would be better. They draw a bit of juice on startup especially the brand new ones. Don’t Use an extension cord unless it is short and has an honest 15+ amp rating. Preferably 12ga wire so you will not have problems.
Don't push your air fill past the compressor’s spec which is 4350psi. A little less is usually better than the max, and the Yong Heng should last for years unless you get a bad one.
I do not fill past 4200psi as when I do, all too often, I blow a burst disc. This may not happen on the first or second fill but soon thereafter it will.
I actually found a restriction in my Tuxing filter that was causing the ruptured burst discs. I can now fill to 4350 or so without problems.
I now have two YH compressors bought the second as a backup for the first as I fergot to turn on the coolant pump several times and overheated the first until it smoked. It did not like it but it continued to run just fine. Still I did not trust it after that. I added a switched outlet, to the system, so it turns the pump on before the compressor will power up to keep me from doing that from now on.
The second one, my back up unit, died in about two months bad QC from the factory. Cost me $12 for a new second stage piston and an hours’ time to replace it. Then to add insult to injury I fergot to put oil in, the latest unit after I put it back together, and ran it for several minutes without any. So I filled it with oil and it fired up and somehow still werqs fine. A testament to the oil it had in it before. The #1 unit that, I was worried about cuz I overheated it so many times, just kept on filling my guns and tanks till I got #2 repaired. The #1 unit got retired because it had the weak old style piston in it that was overdue for failure. I will replace that someday and have another good compressor.
The temperature sensor only measures head temperature so running it much over 20-30 minutes can overheat the motor and other parts even if ice is used in the coolant. Ice or a container of it, in the coolant, is a good idea especially if you are like me and do not use the full five gallons of water as suggested in the manual.
Keep your water supply level with the compressor to be kind to the pump and assure a good supply of coolant goes through the compressor.
On a sealed system, both coolant lines submerged you do not need to keep the reservoir and compressor at the same height.
I recently started using this Red Line water treatment after I noticed algae growth in my 2.5 gallon water bucket every few months. It seems to have stopped or significantly slowed the algae growth. I will know more in a few months.
Three months has gone by with no discernible algae growth so the water treatment werqs for that long anyway.
https://www.autozone.com/antifreeze-radiator-additives-and-windshield-wash-fluid/coolant-water-wetter-additive/red-line-water-wetter-super-coolant-12oz/486218_0_0
Keep your moisture filters, guns and tanks being filled above the compressor to help keep the moisture out.
Purge the system of moisture, using the screw valves on both sides of the compressor, for a couple of seconds every five minutes while in use.
Change out your small YH filter every twenty minutes and set the old one out to dry and reuse later.
Add a better filter if needed to be sure more moisture and any oil smell is removed from the system. Many of us use this Tuxing three media filter although, if you feel the need, you can change media types at any time.
https://www.aliexpress.com/item/32891898253.html
A smaller one will probly do for some.
https://www.aliexpress.com/item/4000960926898.html?spm=a2g0s.9042311.0.0.2a034c4dL0nrJU
Possibly a filter similar one of these, in addition to your desiccant filter, if humidity is high in your area and your desiccant filters have to be replaced often.
https://www.ebay.com/itm/30MPa-High-Pressure-Air-Filter-Oil-Water-Separator-For-Air-Pump-Air-Tank/402600939671
https://www.aliexpress.com/item/33032569946.html?spm=a2g0o.productlist.0.0.56fc60ccm8gTGq&ad_pvid=20210607072408105818162084010006558357_1&s=p
Bleed the pressure before you turn the unit off and let it run a few seconds to get the better part of the moisture out of the system. I have found that I blow less burst discs if I bleed before shutting down so I do this religiously.
Let the coolant pump run for a few minutes after shutdown to cool things off.
I run the compressor in my 65 degree basement with humidity levels between 55 and 65%. Your purging times, filter and cooling requirements may be different than mine if your humidity levels and temperatures are not the same.
Edit New Pic;
I now use a fan blowing through the back of the compressor this radically reduces the temps and extends filling times.
Just Yong Heng Info
In the manual the recommended amount of water in the reservoir is 5gal. Good for ten to twelve minutes or so of runtime with the stock system, depending on your compressors environment, before you will need to shutdown to avoid an overheat.
Distilled water is not a good thing to use as it will eventually cause pitting in the aluminum parts exposed to the water.
Plain filtered water will cool better than water with antifreeze added. If you want less corrosion use Water Wetter. It will cool better than plain filtered water and give you some protection from corrosion as well.
Although in my testing using watered down antifreeze 80% water 20% antifreeze vs Water Wetter I did not see too much of a difference in temperature.
Too much filter volume will cause one to have less fill time before the required shutdown so it will take longer to fill. But then again you will need to use the appropriate filter for the environment you are in. So, those in higher humidity areas will naturally have a bigger filter and less filling time.
Although Teflon tape is NOT used on the Yong Heng itself. It may be used on some NPT fittings not on the compressor itself. I have found that the Blue Lockight also werqs for this purpose.
You can use one way valves and shutoffs to keep the pressure in the larger filters to keep fill times shorter and lengthen the life of some compressors that have short lifespans
Info on the radiator install.
https://www.airgunnation.com/topic/yet-another-yong-heng-mod/?referrer=1
Here is a video on how to fill a SCBA tank.
https://youtu.be/_grx5p_R8D4
Bio,
Best edition of your Yong Heng fact sheet ever. Should be required reading for all Yong Heng owners, beginners and long-timers. I couldn't be happier with mine, after getting $125 water separator to handle Florida humidity, that is. Congrats on finally getting M3. Trophy for "Most Patient in the Nation," goes to Biohazardman!
WM
Best edition of your Yong Heng fact sheet ever. Should be required reading for all Yong Heng owners, beginners and long-timers. I couldn't be happier with mine, after getting $125 water separator to handle Florida humidity, that is. Congrats on finally getting M3. Trophy for "Most Patient in the Nation," goes to Biohazardman!
WM
Upvote 0
Thanks @biohazardman! Awesome information there! I was tempted to get the 220v version but only 10-15% faster and the hassle to get the right plug I decided against spending another 400 bucks. LOL
Upvote 0
My thought were/are a subforum where all YH related threads goes.
bhm: your post is very fine but besides the point.
I have had a YH and i hated it from git go. Biggest mistake of my life and i gave it away with less than 2 hours on the clock.
If it is all you can afford then all power to you as you are independent of the diving shops! I took 1 hour overtime for 3 months and bought a Coltri MCH-6, but that's beside the point.
If there is a YH subforum folks with them will know where to find info and tips from other YH owners.
This suforum is taped over with threads with questions that has allready been answered umpteen times because new members dont know how to search for answers. If the YH gets it's own subforum then a simple look through will most often get answers, and bhm, threads like yours should be made a sticky there!
bhm: your post is very fine but besides the point.
I have had a YH and i hated it from git go. Biggest mistake of my life and i gave it away with less than 2 hours on the clock.
If it is all you can afford then all power to you as you are independent of the diving shops! I took 1 hour overtime for 3 months and bought a Coltri MCH-6, but that's beside the point.
If there is a YH subforum folks with them will know where to find info and tips from other YH owners.
This suforum is taped over with threads with questions that has allready been answered umpteen times because new members dont know how to search for answers. If the YH gets it's own subforum then a simple look through will most often get answers, and bhm, threads like yours should be made a sticky there!
Upvote 0
Just need a simple search and YH compressor info is all over AGN, google and YouTube. Only a couple of hours of YouTube videos and I was running and lived happily ever after. I had to replace the gauge this week after a year and half but that’s besides the point.
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Chickenthief
Good for you! :^) I'm sure you will find your $2000+ compressor a bit more refined and durable than the $300 Yong Heng.
Good for you! :^) I'm sure you will find your $2000+ compressor a bit more refined and durable than the $300 Yong Heng.
Upvote 0
chickenthief- I suggested that a separate thread be created in another board (Browning, to Buckmark) well over a decade ago. It took the board “intelligentsia” 13+ years, but they finally did it.
while it makes sense, I would not hold my breath in expectation of it happening, here…
while it makes sense, I would not hold my breath in expectation of it happening, here…
Upvote 0
I have ordered and received my Digital Yong Heng recently with Tuxing 3 media filter....
So busy setting up my system the way I want it. Will soon be ready, just waiting on the oil to be delivered.
There was no manual in the box and according to retailer all his stock units do not have manuals.
Google has not been successful in finding a manual on the newer models, I found one on GTA for an older model. Does anyone have an electronic version?
So busy setting up my system the way I want it. Will soon be ready, just waiting on the oil to be delivered.
There was no manual in the box and according to retailer all his stock units do not have manuals.
Google has not been successful in finding a manual on the newer models, I found one on GTA for an older model. Does anyone have an electronic version?
Upvote 0
Been recommended a Yong Heng for my pcp’s by a few people on this forum going to purchase one now 
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Any advice on running a new YH in? I have heard pump rifle\cylinder to 50 bar, purge and switch off, allow to completely cool, then take to 100 bar, repeating every 50 bar until at target pressure. Always making sure to stay within recommended max temp.
Would this suffice?
Would this suffice?
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Thanks for the good info. So, if I want to get a hardcover version on amazon, ebay, or walmart plus the oil, the batteries, filters, etc that i need to safely fill my air rifles do you have a link for that specific one. I’m looking and rarely does it say which version Im buying. Thanks!
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@Scylla check this link out for Yong Heng information. https://www.airgunnation.com/topic/a-dedicated-yong-heng-subforum/#post-1127767
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Ezana: that links back to this page!
i read the stuff at the top. It looks like the shipping at aliexpress is prohibitive. I’d like to make sure I get the right version here in the US. i could use Amazon, Walmart, Ebay, or whatever. Amazon preferably since I am a Prime member. Does someone know a link to the hardcover version on Amazon?
i read the stuff at the top. It looks like the shipping at aliexpress is prohibitive. I’d like to make sure I get the right version here in the US. i could use Amazon, Walmart, Ebay, or whatever. Amazon preferably since I am a Prime member. Does someone know a link to the hardcover version on Amazon?
Upvote 0