just curious. I have heard that its two-cylinder brothers like the Tuxing is quieter although the basic design is the same ( or are they ? )
Why is Yong Heng so noisy ?
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All the noise come sfrom them using a sintered bronze intake filter. You can replace the filter with any other using 1/4 bsp or npt thread. Or use a hose barb to relocate the filter.
It's normal to feel air go both ways through the filter.
It's normal to feel air go both ways through the filter.
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I have a new one, digital, and is less noisier than YH and digital, only difference is the air intake.
Here is a pic where you can see the intake filter in white
Digital display
Here is a pic where you can see the intake filter in white
Digital display
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Thanks for the info, the filter on your compressor looks quite ordinary. How does it help to cut down the noise level ?
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My first compressor was then yong Heng and it was loud. I switch to the hatsan lighting and when I first turn on the hatsan, I was like wow. This thing is damn quiet. The yong heng is about twice as loud as the hatsan lighting. The yong Heng may be loud, but it's a fast compressor and will fill your guns on 2-4 mins Max.
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check all the head /high pressure bolts they vibrate loose and can cause noise and damage if not checked
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What do you think is the reason behind the much lower noise level of the Hatsan ? My impression is that its basically two Yong Heng like heads sharing the same crank case and motor with external filtering and air cooling added.
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The hatsan compressor uses two different heads. One for the low pressure and one for the high pressure. While the yong Heng used only one head for both low and high pressure. I'm thinking all the noises comes from the motor. Yong Heng uses a smaller motor. While the hatsan use a larger motor. Example, a small fan will sound louder than a larger fan. Small doesn't always means less.
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I doubt if the noise is coming from the motor because the motor looks like a squirrel cage motor running at relatively low RPM. This is the type use in electric fans and they are quiet. Just wondering if the separation of the high and low pressure part to two different cylinder has something to do with the big noise reduction.
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@ airgunfans. I don't know why you whine about the noise that your pump makes. My YH purrs like a kitten compared to my lawn mower, brush cutter, leaf blower, chain saw, 9-inch angle grinder, shop compressor and other assorted Pneumatic power tools. I wear hearing protection whilst operating that stuff but don't bother when my little pump is humming along. Perhaps there is something wrong with yours.
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Agreed. Standing beside my YH running isn't uncomfortable. Noticeable yes but not what I would call loud.
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Maybe this will help
" Install an Intake Silencer - A significant amount of the annoying high frequency pulsating noise produced by air compressors comes from the air intake. As the compressor rotates inrushing air is drawn past a reed or flapper valve which rattles and vibrates on each pulse.
Intake muffling devices are usually constructed as a combination air filter and silencing device. Intake air is baffled through tubes or sound deadening materials that dampen the sound produced by the incoming air rush through the filter while keeping the air compressor’s air intake flow restriction to a minimum.
By installing an input silencer or intake muffler such as the one of the Solberg silencer models that we reviewed here you can typically reduce the pulsating noise that the air intake system creates.
To purchase an air intake filter replacement, you’ll need to know the pipe thread size on the intake head of your compressor. The intake silencers come in standard MPT male pipe thread sizes such as ¼”, ⅜”, ½”, ¾”, 1”, etc. You can always use a bell reducer and short pipe nipple to install a larger filter/silencer than required, however you would never want to use an undersized intake filter that restricts the intake air flow to your air compressor.
Some users have reported quieter results by installing the silencing filter on one or two 90-degree street elbows. Here your mileage will vary, you’ll need to experiment with a few different configurations to determine which setup quiets the compressor more.Another option is to plumb the air intake to a remote filter box or even through an outside wall which will further reduce the noise produced by the air compressor."
https://airpsi.com/low-noise/how-to-quiet-an-air-compressor-6-noise-reduction-tips/
" Install an Intake Silencer - A significant amount of the annoying high frequency pulsating noise produced by air compressors comes from the air intake. As the compressor rotates inrushing air is drawn past a reed or flapper valve which rattles and vibrates on each pulse.
Intake muffling devices are usually constructed as a combination air filter and silencing device. Intake air is baffled through tubes or sound deadening materials that dampen the sound produced by the incoming air rush through the filter while keeping the air compressor’s air intake flow restriction to a minimum.
By installing an input silencer or intake muffler such as the one of the Solberg silencer models that we reviewed here you can typically reduce the pulsating noise that the air intake system creates.
To purchase an air intake filter replacement, you’ll need to know the pipe thread size on the intake head of your compressor. The intake silencers come in standard MPT male pipe thread sizes such as ¼”, ⅜”, ½”, ¾”, 1”, etc. You can always use a bell reducer and short pipe nipple to install a larger filter/silencer than required, however you would never want to use an undersized intake filter that restricts the intake air flow to your air compressor.
Some users have reported quieter results by installing the silencing filter on one or two 90-degree street elbows. Here your mileage will vary, you’ll need to experiment with a few different configurations to determine which setup quiets the compressor more.Another option is to plumb the air intake to a remote filter box or even through an outside wall which will further reduce the noise produced by the air compressor."
https://airpsi.com/low-noise/how-to-quiet-an-air-compressor-6-noise-reduction-tips/
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Umm.... everythings are relative. I dont have lawn mower, brush cutter, leaf blower, chain saw or angle grinder. My “shop compressor” is an oil-free type that is as quiet as I breath..... I actually dont have a shop. my neighbors are whining, not me so I hope something can be done
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Yeah, I assumed that you must live in an apartment or something. Have you considered making a box out of coolroom board or even insulated cardboard to cover it, I'm sure that would keep the neighbours of your case.
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I agree,make a lined box,line it with sound absorbing material....remember that vibrations can cause noise so damp the "feet" to.
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I would be very careful of heat retention if you cover it with any enclosure. I like an external fan blowing on mine to remove heat.
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Noise levels must really be subjective when it comes to the YH comps..
I have one, it works amazingly, it's lubed with Royal Purple, always super-cooled, annnd...
It sounds like a metal paint can filled with nuts and bolts while in a shaker with a bullhorn pointed at it.
Seriously, I've owned, used, serviced, sold a LOT of different 'specialty' compressors
ranging from tankless airbrush comps to industrial, and I can say without a doubt
that my little Yong Heng is one of the loudest. It's like firing up a gas motor with no manifold or exhaust.
Seriously though, when it comes to operating them - you'll want to cool them as much as possible!
Cold flowing Air and Cold flowing Water.
Do Not confine them to small spaces. They generate a lot of heat, and that heat needs to dissipate / escape..
Boxing the unit in will cause Excess heat - the exact opposite of what is needed / required for proper / extended use.
They're using a two-stage system. Bottom head drives the top head. Top = high compression / high psi
So you'll have the heat from the motor running, the heat from the heads, and the heat from compressing the air.
Warmer air will also lead to condensation as well as extra expansion in the air cylinders / tanks
Cooler air won't condensate and cause as much expansion, so, less or no need to top back off or over-fill..
Mine came packaged with some really nice / thick foam - roughly 8x10x2"
I use that foam under the comp to help absorb some of the vibrations, and that helps quiet them down a little..
Just my $0.02
Sam -
I have one, it works amazingly, it's lubed with Royal Purple, always super-cooled, annnd...
It sounds like a metal paint can filled with nuts and bolts while in a shaker with a bullhorn pointed at it.
Seriously, I've owned, used, serviced, sold a LOT of different 'specialty' compressors
ranging from tankless airbrush comps to industrial, and I can say without a doubt
that my little Yong Heng is one of the loudest. It's like firing up a gas motor with no manifold or exhaust.
Seriously though, when it comes to operating them - you'll want to cool them as much as possible!
Cold flowing Air and Cold flowing Water.
Do Not confine them to small spaces. They generate a lot of heat, and that heat needs to dissipate / escape..
Boxing the unit in will cause Excess heat - the exact opposite of what is needed / required for proper / extended use.
They're using a two-stage system. Bottom head drives the top head. Top = high compression / high psi
So you'll have the heat from the motor running, the heat from the heads, and the heat from compressing the air.
Warmer air will also lead to condensation as well as extra expansion in the air cylinders / tanks
Cooler air won't condensate and cause as much expansion, so, less or no need to top back off or over-fill..
Mine came packaged with some really nice / thick foam - roughly 8x10x2"
I use that foam under the comp to help absorb some of the vibrations, and that helps quiet them down a little..
Just my $0.02
Sam -
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