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CZ-Sniper
PostPosted: Sat May 20, 2023 2:54 pm 
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I am hoping someone could help me find a spare check-valve for my Yong Heng. I've looked at google, ebay and Aliexpress to no avail.
For now my compressor is doing great, but my check-valve is getting rusty and is in need of replacing.
Any help would be greatly appreciated!

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McRobert
PostPosted: Sat May 20, 2023 5:45 pm 
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Do you mean the thin round one on the top of the final stage cylinder?https://www.aliexpress.com/item/4000832956135.html?spm=a2g0o.productlist.main.45.4c394fb1Lfh6Xy&algo_pvid=d8272216-4176-4eec-9eb8-ac0fec1a9824&algo_exp_id=d8272216-4176-4eec-9eb8-ac0fec1a9824-22&pdp_npi=3%40dis%21CAD%219.32%219.32%21%21%21%21%21%40212250c216846225289504231d0745%2110000008696234811%21sea%21CA%214381166741&curPageLogUid=TWdgBDmDSY2l
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Normk
PostPosted: Sun May 21, 2023 8:40 pm 
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Yong Heng is not necessarily definitive of which compressor.

McRobert listed the check valve used in what many would describe as "genuine Yong Heng", while what is often described as "clone Yong Heng" uses a different check valve which is not compatible.

If aware of this, and seeking the one which McRobert listed, I obtained mine from AliExpress.

The location of the high-pressure outlet pipe is the easiest way to differentiate the "genuine" from the "clone". "Genuine" has the high-pressure outlet pipe coming axially from the top of the cylinder
head. Clone has the pipe from the side of the cylinder head.

Clones use a conical valve with attached coil spring:

This looks to be the valve you need: https://www.aliexpress.com/item/3296584 ... GckiNxzsbP

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McRobert
PostPosted: Sun May 21, 2023 9:37 pm 
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My compressors are both Yong Hengs, and the one I listed is what mine takes. I have spares for mine, I purchased them as soon I saw how delicate they were.
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CZ-Sniper
PostPosted: Mon May 22, 2023 5:41 am 
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Thank you all for taking the time to share the links and for your responses!
However, I am looking for the part pictured.
Sorry for the quality. It is not a flat disc shape as the one in your link. It has an o ring and a small spring on one end of it as well. And it comes out of that hole in the part held in the other hand.
Link to my photo: https://photos.app.goo.gl/ZxsBvpsGw1hsXz5q8

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McRobert
PostPosted: Mon May 22, 2023 6:27 am 
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Here is the manual with the parts diagram. If your check valve is in the high pressure block where the tube enters I have no valve there, just at the base of stage 2 cylinder parts 8 and 9 https://shop4905.carlsplace.org/content?c=yong+heng+compressor+parts+diagram&id=1
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McRobert
PostPosted: Mon May 22, 2023 12:43 pm 
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I think this what I am seeing in your Pic.https://www.alibaba.com/product-detail/Yong-heng-High-Pressure-One-way_1600054810796.html

For most of the compressor stuff and pcp they call them one way valves.

Robert
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CZ-Sniper
PostPosted: Mon May 22, 2023 2:41 pm 
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McRobert wrote:
I think this what I am seeing in your Pic.https://www.alibaba.com/product-detail/Yong-heng-High-Pressure-One-way_1600054810796.html

For most of the compressor stuff and pcp they call them one way valves.

Robert


That's the one! Thank you very much Robert for your help, I just ordered a few of them. That diagram you sent me is excellent too. Thanks again!

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Ravenairgun
PostPosted: Tue May 23, 2023 10:28 pm 
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had mine for almost over 2 years only replaced one burst disk still runs great
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CZ-Sniper
PostPosted: Wed May 24, 2023 7:47 pm 
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Ravenairgun wrote:
had mine for almost over 2 years only replaced one burst disk still runs great


Good to hear, Ravenairgun. I got mine in October, 2017, so almost 6 years now. It has also worked and continues to work great.
I just decided to take it apart after 6 years to inspect the parts, just to see if the o rings are still good, etc.. That's when I found the rusty check-valve (one way valve) in the decompression chamber. It's only a couple bucks to replace from Alibaba.com. What a solid compressor.

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FX Streamline laminate .22
Benjamin Discovery .22 (tuned)
Weihrauch HW30S .177
Weihrauch HW30 MK1 .177
Weihrauch HW40
Beeman P17
Crosman 22xx carbine (tuned)
Princess Auto Super Springer Deluxe ($34.99)
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Ravenairgun
PostPosted: Thu May 25, 2023 12:27 am 
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ya super solid compressor loud as a truck horn tho
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