- Thread starter jenny1
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timgunn1962
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Vacuum pumps draw a vacuum (seems obvious, but....).
Many oils are blended from a range of different-sized oil molecules. The smaller molecules will vapourize quite readily and this will limit the vacuum that can be pulled: once the absolute pressure gets down to the vapour pressure of the lightest components of the oil, they will boil off. Vacuum pump oils are formulated with a narrow range of molecule sizes and a very low vapour pressure.
Many oils are blended from a range of different-sized oil molecules. The smaller molecules will vapourize quite readily and this will limit the vacuum that can be pulled: once the absolute pressure gets down to the vapour pressure of the lightest components of the oil, they will boil off. Vacuum pump oils are formulated with a narrow range of molecule sizes and a very low vapour pressure.
mtt.tr
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Milking machines aren't pulling down mbars, well unless you want yours mooks insides on the outsides
its basically this type of generic pump, but even 2,5 cfm:
it does have the same exact oil bottle though, so maybe it means iso 100 then and if a "compressor oil" is iso 100, then i can use that too?
and does it even matter if the manual says its "for" 410a or 134a, because i could just use it for both of them?
it does have the same exact oil bottle though, so maybe it means iso 100 then and if a "compressor oil" is iso 100, then i can use that too?
and does it even matter if the manual says its "for" 410a or 134a, because i could just use it for both of them?
mtt.tr
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Well this should be used after the refrigerant is removed with a recovery pump.
The oil shouldn't see refrigerant
Kram
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Have a similar pump for the vac chamber, using the supplied oil. At low pressures the oulet smokes, but this may be volatiles coming out of the rubber sheet I'm using as the chamber seals. Sorry that doesnt help much..
Proper rotary vane oil for these pumps appears a bit expensive, however the wrong stuff shouldnt damage it, rather just limit how much vacuum you can pull.
Proper rotary vane oil for these pumps appears a bit expensive, however the wrong stuff shouldnt damage it, rather just limit how much vacuum you can pull.
mtt.tr
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They do typically smoke, it water vapour as its been boiled off at low presures and the pump oil volatiles
mtt.tr
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Shouldnt make any difference, the oil should be change often anyhow as your ability to draw a vacuum will be diminished
Yes most compressor's and vac pumps use an iso100 hydraulic oil. But don't use it in a HVAC high vac pump.
a high vac hvac pump is used for removing moisture from refrigeration/AC systems it pulls a much lower vacuum, They are not rated for continuous use and need a specialist oil. a standard vac pump [there are many types] can run continuously, dosent pull as low a vacuum and dosent need a special oil.what is a 'high vac pump' and is it somehow different from a regular 'vac pump' and is the regular 'vac pump' an 'hvac vac pump' too, just somekind of 'hvac low vac pump' then?
