I just want to clear some things up so I will be better informed in the future.
Is it only mineral oils that will cause a reaction with HP air?
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James
AFAIK, mineral oil is a no no. Because it is based on a combustible material. All oils are extracted from crude oil, petrol, diesel, kerosene etc..all come from the same place via fractional distillation...(they heat the oil up at the bottom and as it rises and cools at different rates, different substances are filtered off).
When you fire air into the bottle, it mixes with the oil, but also, friction is generated...you can feel its warm on the outside of the reg, so you can imagine how warm it is in the tiny hole inside.
Someone with lots of Physics knowledge, I think corrected me as to how the oil/air mix is ignited, I think...but, heat fuel and oxygen = flame...nuff said.
Silicon is not a combustible material in that way, so...wont go bang.