vac pump oil locally? wal mart?
- Thread starter vacpurge
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method2mymadness
Well-Known Member
Home depot or ace hardware usually have it
Fadedawg
Well-Known Member
We buy ours from the local RSD refrigeration supply depot. A gallon is around $20.
We replace ours after every cold boiling, so we go through quite a bit.
Take a look at the color of your oil and sniff it. Our's starts out clear, turns dark, and begins to reek of plant terpenes and alcohol.
We replace ours after every cold boiling, so we go through quite a bit.
Take a look at the color of your oil and sniff it. Our's starts out clear, turns dark, and begins to reek of plant terpenes and alcohol.
Guzias1
Well-Known Member
took me some searching to find the right oil... and i read if you get the wrong oil, your vac aint gonna reach its full potential..
i found mine a local Appliance Repair shop , they fix stoves, heaters, fridges etc.. they had some fattttt vacuums there as well..
call around/ask your local suppliers..
i found mine a local Appliance Repair shop , they fix stoves, heaters, fridges etc.. they had some fattttt vacuums there as well..
call around/ask your local suppliers..
Fadedawg
Well-Known Member
Because of crankcase contamination. It dillutes the oil and will knock out the bearings.
Not much of an issue when final purging oleoresin, but it is when cold boiling off a solvent like alcohol. You can watch the oil level rise in the sight glass as it absorbs solvent.
vacpurge
New Member
can you explain this further??
how exactly does a vacuum pump work? why is the oil used and if its for bearings, why cant I use 15w40?
also, what is that steam that comes out of the exhaust port?
what is cold boiling exactly? very interesting stuff. I got a cheap little vacuum pump and am not scared to be hard on it.. almost cheaper to just keep buying new pumps than to re fill them with oil
how exactly does a vacuum pump work? why is the oil used and if its for bearings, why cant I use 15w40?
also, what is that steam that comes out of the exhaust port?
what is cold boiling exactly? very interesting stuff. I got a cheap little vacuum pump and am not scared to be hard on it.. almost cheaper to just keep buying new pumps than to re fill them with oil
Fadedawg
Well-Known Member
can you explain this further??
how exactly does a vacuum pump work? why is the oil used and if its for bearings, why cant I use 15w40?
also, what is that steam that comes out of the exhaust port?
what is cold boiling exactly? very interesting stuff. I got a cheap little vacuum pump and am not scared to be hard on it.. almost cheaper to just keep buying new pumps than to re fill them with oil
Different vacuum pumps work differently, but the one in most common use for our purposes, is a rotary vane compressor, which works by rotating vanes in a irregularly shaped chamber, and relies on the oil both for its bearings and its seal.
Vacuum pump oil is formulated to low vapor pressure, to keep it from boiling under vacuum and to be compatible with the refrigerants used.
The steam that comes out of the exhaust port is water and oil vapor.
Cold boiling is lowering the atmospheric pressure on a solution, so that it boils at a lower temperature than at atmospheric pressure.
We don't replace the oil after doing a final butane purge, but do so after cold boiling because of the high amount of contamination present. We pay about $20 a gallon, which is a couple of dozen changes, so it isn't all that expensive to keep clean.
Alternately you can use a cold trap, but ours isn't efficient enough yet to keep from contaminating the oil anyway, it just takes longer.
vacpurge
New Member
so that steam that comes out... id imagine thats not good to be breathing? when I let my pump run, with a rag over the exhaust port in a closed room then come back after 10 minutes the room looks hotboxed. is that bad? should I be venting it outside?
so anything that is put into the desiccator is considered cold boiled?
my little pump holds 300ml so I think buying a gallon would be the best way. I could get about 13 changes from that which is pretty good. now just got to find some. going to check out home depot today after tonight.
so anything that is put into the desiccator is considered cold boiled?
my little pump holds 300ml so I think buying a gallon would be the best way. I could get about 13 changes from that which is pretty good. now just got to find some. going to check out home depot today after tonight.
Fadedawg
Well-Known Member
Your pump will put out some pump oil vapors, along with the solvent vapors. I would personally vent them outside.
Cold boiling is lowering the boiling point of a substance using vacuum. It also applies to final purging, but when I use the term, it means boiling off a container of liquid using low heat and high vacuum.
Check out your refrigeration supply houses for vacuum pump oil. We get ours at RSD or Johnstone.
Cold boiling is lowering the boiling point of a substance using vacuum. It also applies to final purging, but when I use the term, it means boiling off a container of liquid using low heat and high vacuum.
Check out your refrigeration supply houses for vacuum pump oil. We get ours at RSD or Johnstone.
http://www.amazon.com/Robinair-1320...id=1365398036&sr=8-1&keywords=vacuum+pump+oil
u started this thread six days ago u could of just ordered it
u started this thread six days ago u could of just ordered it
