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Adding dessicant to tuxing compressor

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caliusoptimus

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Feb 10, 2024
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I've had an idea for a while to add a dessicant trap between stages on my tuxing compressor.

First I'm wondering if anyone has measured the pressure between these stages. The bowl I have is labeled up to 250psi. Figured I'd ask before I start disassembling those fittings as they seem to be stuck.

I've been using it as a prefilter for a while now. Definitely seems to reduce the moisture leaving the bleed screw, but I imagine it would be even better under pressure.

Side question: the air from this thing stinks like oil. Any budget methods to improve the air purity?

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Yes, I have a Hatsan Lightning (same as Tuxing TXEDT031) and I have measured both the first and second stages isolated from each other. When the compressor is healthy the first stage puts out ~400 PSI and the second stage puts out ~200 PSI. So I would not recommend using the filter you have on the output of the first stage, you probably want something rated in the 800 PSI+ range for a 2X safety margin. I have attached a couple of photos showing the gauge I setup for measuring the 2 stages independently.

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cwcarrera said:
Yes, I have a Hatsan Lightning (same as Tuxing TXEDT031) and I have measured both the first and second stages isolated from each other. When the compressor is healthy the first stage puts out ~400 PSI and the second stage puts out ~200 PSI. So I would not recommend using the filter you have on the output of the first stage, you probably want something rated in the 800 PSI+ range for a 2X safety margin. I have attached a couple of photos showing the gauge I setup for measuring the 2 stages independently.

View attachment 465669 View attachment 465670
Click to expand...
Thank you for the info! This will save me some messing around, I appreciate it.
 
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Star7 said:
The oil odor might suggest a better quality of oil. One of the failure modes of these is cheap oil combusting in the last, highest-pressure stage and causing the o rings to burn. Or, you could add a carbon filter at the output but that is covering up a potential problem.
Click to expand...
Any suggestions on a different oil? Currently filled with royal purple.
 
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My Yong Heng is used as a secondary compressor at a rural property, and I started out using Royal Purple. I had no problems but after a short time, switched to Seco Lube type 500. I can't say for sure that Royal Purple is bad news but the failure mode most seen seems to be the last (high P) stage seals burning. A synthetic lube should have a higher combustion temperature. Seco Lube is used in some dive compressors due to its resistance to combustion and contamination of breathable air. Many people use Royal Purple with apparently no trouble.
 
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