yung heng + air tank?

IMHO - if you care for your compressor, and run at a reasonable operating temperature with good synthetic oil (don't pay attention to the instructions, get synthetic compressor oil, like what Home Desperate sells), it should run for many many hours. I've been filling my 90 CI bottles for a year now off a Yong Heng. I'm only concerned when the ambient temp is extremely high or extremely low. Example, was filling at 102 air temp, so the compressor was hitting 65C. I normally don't like it to go over 60C. Why is 60 a magic number? To be honest, I don't know. Just is for me personally.

Other extreme is 30 degree weather. I'll probably have to warm it first before starting to ensure the oil is thin enough to circulate.

I've been using the 100% synthetic compressor oil here: https://www.homedepot.com/p/Husky-16-oz-100-Full-Synthetic-Compressor-Oil-018-0083H/300135698

The hydraulic oil in the instructions for the compressor seems to be a mis-translation

All of the statements above are my opinion, nothing more.

One caveat - once you start using a Yong Heng, oil fumes will get into your tank. While this doesn't impact shooting, it may impact your ability to have a scuba shop fill the tank. Once oil is in the tank, I understand that some shops won't fill for fear of contaminating their breathing air systems. Reasonable, but do be aware. 

Time - my tanks are very small and take something like 8 minutes to fill from 2500 to 4500. A large tank will take 45 minutes or an hour depending. You don't really want to leave the tank unattended, so do pay attention.
 
Yes the Yong Heng HPA compressor can fill larger tanks. I use one to fill 80+cuft tanks all the time. The key is operation temperature and duty cycle. 

Try to keep the operating temp below 57c I also only operate the compressor in 15 min duty cycles.

My little Yong Heng has been performing admirably. The compressor was really only purchased an evaluation but here i am 2 years later :)


 
Yes the Yong Heng HPA compressor can fill larger tanks. I use one to fill 80+cuft tanks all the time. The key is operation temperature and duty cycle. 

Try to keep the operating temp below 57c I also only operate the compressor in 15 min duty cycles.

My little Yong Heng has been performing admirably. The compressor was really only purchased an evaluation but here i am 2 years later :)


Agree. I top off my Great White (97 cf listed) with a Yong Heng. It does it relatively easily and doesn't take a long time. How long it will last is uncertain but 2 years is a long time.
 
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The black filter above the pump is filled with molecular sieve, the inlet side from the compressor is a check valve, just use a male / male foster fitting to connect to tanks fill hose.