I have always had the understanding that vacuum pump oil was a specific type of oil.
Ac vacuum pump oil substitute.
Distilled vacuum pump oil is mixed with specific solvents which aid in lubrication oxidation resistance and foaming resistance.
Things for consideration.
This is for a welch vacuum pump i got at a garage sale.
Now i m in a jamb.
It came without oil so it s just been sitting on the shelf and i completely forgot to buy a quart.
This means hydrotreated oils do not mix with.
Your application of the vacuum pump is very important to determine the type of oil you will use.
If the susbstance that you are vacuuming consist of high moisture then your oil should be able to withstand it.
I know i can get vacuum pump oil shipped to me from speciality suppliers but if i choose to use an off the shelf product what would be the closest fit.
What s the closest substitute for vacuum pump oil that can be purchased at normal stores.
It s used for evacuating air conditioning systems.
Messages 18 449 location east of.
Someone please clarify something for me.
Since you are using the oil in a vacuum process there is very little chance it will enter or contaminate your.
The baby oil would work.
I thought vacuum pump oil was hygroscopic in nature absorbs moisture and this being the reason that keeping fresh vacuum pump oil in your pump will aid in quicker pull downs.
Material of the vacuum pump seal which should be able to resist the oil corrosion.
These characteristics are important for vacuum pump oil as they increase the life and performance of the pump and the oil itself.
And your jug of vacuum pump oil is empty and johnstone supply is closed until monday.
Hydrotreated pump oil however does not share the same solubility as distilled pump oil.
Now let 39 s also assume there 39 s a napa auto parts nearby with a wide selection tranny fluid hydraulic fluid compressor oil and motor oil.
Remember that the vacuum performance will drop accordingly as the moisture increase.
Oil substitutes shortening use.
Vacuum pump oil should have as low a vapor pressure as possible e g low volatiles.
More or in baking fold stiffly beaten egg whites into the batter.
That is why we purchase it at our supply house instead of any automotive store.
Short answer yes you can use it.
Is there a substitute oil that 39 ll do the job without damaging your pump until you can get the right stuff.
I m not using it to pull a vacuum on a.
I want to use the pump later today and or tomorrow morning to bleed the brakes on my work truck.