Short question. Welch has their own pump oil. As always they say to only use theirs. Almost double/triple price of say black gold oil. Is this oil actually necessary? Running Welch duoseal 1400
I’ve gotten lower vac results with their oil compared to other oils, so it might not be necessary but it really gives better results. My 2 cents. That being said, my vac gauge probably needs calibration and others use different oil with great results.
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Use 19 or 20 grade oil and you’ll be just fine. There oil is nothing special and you’ll get rhe vac depth you need with thise oils. I get pro torr 19 from avac industries and get steady single difit micron ratings
any opinion on black gold oil? amazon has pretty good prices on it
https://www.amazon.com/JB-Industries-DVO-24-Bottle-Vacuum-x/dp/B001UH3L8K/ref=sr_1_1?ie=UTF8&qid=1548366923&sr=8-1&keywords=black+gold+vacuum+pump+oil
Damn, I was just looking at this too a few minutes ago. Was wondering the same. I’m running a Welch 1405 Duo Seal
Note that MANY if not most vacuum pump oils that are common have a rated viscosity for direct drive pumps. You won’t notice much difference unless you have dirty or incorrect oil. Welch doesn’t make pump oils, so find their source.
i’ve had good results with jb black gold, iirc it suits direct drives rather than lower rpm belt driven pumps.
So considering the Welch duoseal is a low rpm belt driven pump, you’re suggesting to not go with the job black gold? A gallon of the suggest Welch oil is like 70 bucks compared to 30 or so for the black gold. But obviously don’t wanna wreck a super expensive pump. Dang
Buy inland 19…great oil and you can get 5 gallons for about 140 from provac. Single digit for sure.
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Heres inland 19 vac oil, just a quick oil change got me to 5 micron blanked off
If you can find vac 20 oil, its better from my reading. Pulles deeper vac and less smoke
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I have an Edwards e2m40, which is recommended to use this oil with:
Has anyone tried using a 20 grade oil with this pump? Is this also a hustle like welch?
Use black gold for anything not requiring high vacuum, works in most rotary vanes, including welch 1400 ect, that stuff is great and cheap, they claim it gets as low as 50 microns and back in the day I used it to distill cannabinoids using a cheap orange 3 cfm china pump, so it can be done. But i would highly recomend using the black gold for buchner/ rotovap pumps. And dont skimp when it comes to the high vac stuff, USAlabs sells a gallon for 45 of inland19, gets my used alcatel down to 5 micron no problem.
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grade 20 actually pulls slightly less of a vac but is a more hardy resistant oil.
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Viscosity change will lead to more frequent rebuilds. Higher operating temps, lower throughput (cfm), increased wear on the ac drive, and all other symptoms of abuse. RPM differences can dictate a different oil in the same pump. Take a look it’s in a book…read the manual. A low speed pump like most belt driven suckers will have different needs than a 3570rpm direct drive vane pump . Think of it like a vehicles engine or try some rotella hd your Honda.
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I use 19 ultra from cacejen and that got me 1.2 micron on my Welch pro8 and 1 micron (dipped to ur=under rated pressure too) on the 2021i. I will say that my digivac gauges couldn’t read that at all, I’m using an Edward’s now.
It could be more expensive, not because it allows deeper vacuum, but because it degrades slower. DuPont makes a vacuum oil called Krytox. Its like $5K for a gallon. But its some kind of perflouronated oil, and it will stand up to harsh environments like acids, bases… etc.
Welcome Eislon…do not waste your money on PTFE vacuum oils…they are for specific applications and as your have found out,damn expensive. I have used vacuum oil produced my Mobil, the HV 68 and HV 100 series and they work fantastic. Word of advise on oil sealed pumps…change the oil often…with cannabis distillations you will get material into the pump oil and that is what kills the pump. The oil sealed pumps uses the vacuum pump oil to seal the vacuum chamber, but more important…it lubricates the shaft journals, which is accomplished with small passages in the pump internals. When the oil gets contaminated, usually the contaminant breaks down into a “goo” and not only makes the vanes stick…it also plugs up the small internal passages, which ruins the shaft journals and vacuum module, essentially killing the pump. So in simple terms, change the oil often and the pump will last…my favorite pump is the Leybold Trivac B series…bullet-proof and better than the crappy Edwards pumps.
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I just got my s25b from Ebay, flushed it with flushing fluid filled it with 19 ultra oil and boom pulled down to ultimate vac right away.
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I assume you mean a D25B…the Ultra 19 is a good oil…probably relabeled oil from the Big
Boys. I have talked to the Mobil rep and he said that they sell a lot of the bulk oil to smaller companies and they relabel and repackage. He did not say which ones due to confidentiality agreements, but it is does happen. In the end, it does not matter as long as the pump works and you change the oil often. Good Luck!
I’m sorry to say you are assuming incorrectly, sir. I did indeed mean the s25b and I got it as a roughing pump and the s means single vane whereas the d means dual. I did on the other hand get 2 2021i as my precision pumps to run after the s25b is done with the volatiles.
Interesting about the relabeling, but it doesn’t surprise me. Tbh I don’t know tree the details of the 19 ultra, just that it works real well with the pumps I’ve tried it in.