Gas bottles

Sorry
I obviously haven't expressed myself properly. The Q has a regulator, which I am running the 3.3 through. What I am asking is does the regulator require more pressure than my unregulated 2 burner stove? And if so, does the 3.3 squat bottle have sufficient pressure to run it. And will it have sufficient pressure throughout the life of the gas fill, or will it stop running the Q while still having gas left?

teege

Allan, that is a sensational explanation of how a LPG bottle works.

Thanks mate.

Fred.

I have often wondered myself, but in layman terms this explains the whole lot
Thank you for that.
Regards
Paul

Thanks guys, while I'm on a roll I'll drop another word of wisdom for those who get worried about the potential for over-filling a LPG bottle.

These bottles incorporate a vent which is opened to facilitate the filling process. You may have noticed this venting vapour during filling. This vent connects to a tube which projects several centimetres down into the bottle. When the rising liquid LPG reaches the end of the tube it escapes from the vent. This prevents the liquid from rising any higher than the bottom of the tube and creates a vapour space at the top of the bottle allowing for expansion due to temperature. Thus the bottle cannot be over-filled. The LPG which is supplied from the bottle comes from an opening at the top in the vapour space above the dip-tube.

Alan's explanation of constant pressure at the top explains why the gauge on the gas fuses is useless. This gauge works on pressure. Whilst there is still plenty of gas in the cylinder, the variation of the gauge is only the result of the change of pressure with temperature.

When the pressure in the cylinder commences to drop because it is nearly empty, then and only then will you see a drop in the gauge reading. You can get a better indication that the bottle is nearly empty by watching the flame level.