Air compressor from fire extinguisher - video

[Saaglem]

You should NEVER use grease or oil on a regulator. Not only will it gunk up the inside and contaminate your reaction system, but these organic materials can react with the air being dispensed. When air is being pumped into a cylinder the water in the air cause erosion that can dislodge when the air is released. This can travel on the inside and on its route to the outside and cause a spark, now because it is compressed it is under normal conditions not possible, but, when mixed with oil or grease it creates an chain reaction of the friction that is caused by bonding of the air and oil. Then it can explode!

The reason why refrigerant doesn't cause an issue with oil is because it is not explosive gas, plus, the system is being vacuumed before hand.

A couple of years ago my Dad showed me how normal butane gas can be used as a refrigerant an it boils at a higher temperature, free, and everywhere and it's discharge effect is less corrosive to the environment than refrigerant, only bad thing about it it is explosive.

Look it up, there is a lot of scriptures regarding oil versus regulators.

Cheers