It’s not the cannabinoids that do it, it’s the oxygen. And not during a normal run; only when the backing vacuum is compromised and the concentration of oxygen rises. The actual run has nothing to do with it.
Like I said, under high vacuum the oil IS inert. It’s when it’s under atmosphere that it burns.
Please explain how oxygen creates a chemical reaction on a molecular level with inert oils.
Dude. Diffusion oils are meant to eject pure gasses like oxygen for instance. It’s called fomblin or fomblin type. They don’t react. Your using organic petrol derrived vacuum pump oil as a example like vane pumps use. Diffusion isn’t like that. The oil doesn’t just burn and char the walls. It’s entirely happening from contamination. And the contamination itself burning and creating those oxidized or burned and carbonized coatings you see in pumps.
Just my two cents I’ve done stupid ass shit with pumps but I have never once ever ever ever once burned the oil and charred the inside. I’ve had hash oil burn inside of a pump and it still came right off and there was no char. I’ve only heard of ever having instances with diffusion pumps in the semiconductor industry or similar industries that have a lot of caustic gases that enter the pump and cause damaged to the oil itself because those vapor streams are conducive to the health of the oil
What chemical reaction is occuring that is causing burning or Charing. In this case if your 50/60 saw air it would splash the oil out of the pump. I have never seen oil char - would this be in the absence of vacuum entirely? Like turning on a diffusion at atm and leaving it open like that for a month without a backing pump?
Dude. I have only seen hash related molecules burn in pumps and even then rarely since diffusions are self cleaning essentially when you lock them off.
I don’t understand what reaction under opperation with air that will cause a chemical reaction on a molecular level with diffusion oil. Please explain that Mr chemist. I’m asking you for proof.
U should read up on diffusion work. This isn’t occuring in any of our rigs or systems. Thanks for pointing out one manual where everything I’ve ever seen or read points to otherwise.
Here’s a manual from Varian. It is even more specific about warning of direct reaction between air and the pump oil. It even goes so far as to consider it an explosion risk. And it specifies that ALL pump oils, including silicon, can be fuel in an oxidation reaction with air.
This one warns of the solid deposit to be formed if pump fluid should be degraded… Huh…
Guys wtf
Just let it go.
Its hilarious how every thread is being derailed by the king 
i think i agree with both of them… somehow…
They both have good points, but spdking does have the edge in the argument.I have been using diffusion pumps for many years…little ones all the way up to ones the size of garbage cans…the are sensitive units and in the hands of amateurs, a real pain. Diff pumps have their place in distillation processes, but they are sometimes sold as the “magic black box” for your distillation shot falls. Now the burning issue is usually form contaminates getting into the diff fluid, most likely the upper butterfly valve that tends to form pools of liquid on the topside of the valve when the diff pump is bypassed…when you open it, it falls into your diff pump contaminating the fluid. Units without the upper valve, the organics that bypass the cold trap end up in the same place…basically your vacuum is too strong and you can’t condense the vapor phase. While some of it boils off, most of the time the organic material degrades to form a char on the inside of the diff pump. I spent many hours cleaning the inside of those damn things. Back in the day when all we had was a hydrocarbon based oil…oxidation was a big problem, so much so that the oil would degrade to a high viscosity goo…usually oxidized due a process upset of sudden vacuum leak. And by the way, you can back flush the diff fluid back to the roughing pump…I had a sight glass let go and blew out a good majority of the diff fluid. The silicone based fluids today have a higher threshold for oxidation…but still don’t like oxygen or contaminates. Your are basically cracking of polymer groups that make up the diff fluid to form a light boiling component and usually a heaving component, of which changes the performance of the diff fluid over time. So spdking is correct on that hypothesis, but came off a little condescending…I don’t know you personally and don’t mean no disrespect, but from the outside looking in…that is how it came off. I am sure you did not mean to come off that way, probably a little frustrated with the thread. With that said, my preference is to not use a diff pump at all, unless it is used in very specific applications…I prefer a two-stage rotary vane pump topped with a roots blower on larger equipment. On smaller units where a roots blower is not possibly, I like going to a larger cfm pump and make sure that the components with a higher vapor pressure are removed prior to going too the very low vacuum ranges. Just my two cents on the subject…I hate to see people arguing when everyone is kind of on the same page…from what I can tell, most people here are rather intelligent…most, not all.
I’m deleting my posts, except for those where I presented real evidence. The evidence can stand on its own. And resolving to no longer get involved in arguments of this sort.
If anyone would like a lucid and in depth explanation of why it is no contradiction that diffusion pumps can function under vacuum while they would burn under atmosphere, I am happy to provide.
Don’t delete your stuff. Let everyone see our battle.
Everyone’s an expert on here. 
🕵🏽♂:dash:
All chemists no Indians.
You may light weight come off like a dick to some people, but thanks for atleast sharing your honest opinions, its weird how some of the super smart people with degrees and what not, act like everything that has been written in books is 100% true and that theres not the slightest chance that some of it could be Incorrect.
All master chemists here and no Indians. I’ll give you my take on the whole thing if need be.
I’m not sure anybody is interested in what you are saying there bud