LuckyWinner
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Use Diesel Fuel for a Stronger Vacuum with Water Aspirator?
im boiling water at around 39C at 30C room temperature and 32C water aspirator temperature.
Im having the water cycle through a bucket with a fuel pump.
would using diesel fuel increase the vacuum by a lot?
if yes by how much?
I would put a gas washing bottle in between to not infuse the diesel with chemicals.
I know you can cool the water but thats very unprecise cause it thaws quickly.
[Edited on 20-2-2019 by LuckyWinner]
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VSEPR_VOID
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I think that thicker liquids provide higher vacuums. Mineral oil is used sometimes but it is messy.
Within cells interlinked
Within cells interlinked
Within cells interlinked
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Σldritch
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As long as it is inert and liquid the only thing that matters is vapor pressure. Do not use fuel, use some high boiling oil or a glycol. You can also
decrease the vapor pressure by cooling your liquid of choice. Personally i would rather spend the money on a better pump than risk making a huge mess
with glycerol or mineral oil, i do not trust my aspirator at all.
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walruslover69
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You can't run a closed circuit vacuum aspirator using mineral oil or glycerol, they are too viscus. They are hard to pump through and the high
viscosity causes them to heat up very quickly so they can't really be used for this application.
I have actually been playing with the idea of making a very high vaccuum aspirator using a low vapor pressure fluid for awhile, but haven't gotten
around to it. The ideal working liquid has a high boiling point, low viscosity and is insoluble in water or whatever you are vacuum distilling.
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Twospoons
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If you are starting to look at exotic fluids for your aspirator, maybe its time to just buy a mechanical vacuum pump.
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walruslover69
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I have a vacuum pump, its more about the novelty of building an aspirator that could produce a vacuum comparable to a single stage pump.
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Ubya
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Quote: Originally posted by walruslover69  | | I have a vacuum pump, its more about the novelty of building an aspirator that could produce a vacuum comparable to a single stage pump.
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use mercury then it would make a better vacuum than a single stage rotary vane
vacuum pump
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Twospoons
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And if you're going to use mercury then a sprengel pump might be the answer.
https://en.wikipedia.org/wiki/Sprengel_pump
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Ubya
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i was referring to that
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LuckyWinner
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codys lab , youtube channel actually has a video on the sprengel pump.
diesel didnt do anything when I used it in my aspirator pump.
same vacuum like water.
the problem is its hard to get a vacuum pump around here...
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Ubya
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| Quote: Originally posted by LuckyWinner | codys lab , youtube channel actually has a video on the sprengel pump.
diesel didnt do anything when I used it in my aspirator pump.
same vacuum like water.
the problem is its hard to get a vacuum pump around here... |
you could use a modified tire compressor, there are many youtube videos about it.
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