A C Vacuum Pump Oil Substitute

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.

A c vacuum pump oil substitute. If i m out of vacuum pump oil i use a refrigeration oil like suniso 3gs which is 155 sus 38 c in a twenty five year old two stage robinair pump you must log in or register to reply here. The baby oil would work but commercial vacuum pump oil probably contains corrosion inhibitors to protect the pump from moisture as well as other additives. It came without oil so it s just been. I think it was the mastercool brand.

Hi guys i bought an electric hvac vacuum pump a few months back and haven t any real reason to use it. But i m kind of surprised your local auto parts store doesn t stock vac pump oil for ac service work on vehicles. 589224 10 04 04 01 57 am. Is there a substitute oil that ll do the job without damaging your pump until you can get the right stuff.

Someone please clarify something for me. Vacuum pump oil substitute hi guys i bought an electric hvac vacuum pump a few months back and haven t any real reason to use it. The more refined an oil the less volatiles it has. That is why we purchase it at our supply house instead of any automotive store.

If you just absolutely had to put something else in a vac pump that would be my guess as to the least possibly harmful. The auto parts stores used to carry mineral based refrigeration oil for car a c though they may be getting away from that now as non134a systems are getting fewer as time goes by. Vacuum pump oil should have as low a vapor pressure as possible e g low volatiles. Moisture degrades the oil s purity thinning it and reducing the pump s ability to reach a deep vacuum.

I have been involved. And your jug of vacuum pump oil is empty and johnstone supply is closed until monday. This is for a welch vacuum pump i got at a garage sale. Now let s also assume there s a napa auto parts nearby with a wide selection tranny fluid hydraulic fluid compressor oil and motor oil.

I know the autozone and napa around here have it on the shelf. I am not real sure what purpose the oil serves in the pump so i don t know whether i can substitute something. Mineral oil is a petroleum based oil so even though it is used as a laxative it can still be hazardous. Vacuum pump oil closest substitute.

It s used for evacuating air conditioning systems. A better alternative would be to use a synthetic lube like anderol 500. Let s assume you discover your pump is totally dry on a weekend job and your jug of vacuum pump oil is empty and johnstone supply is closed.