On 16/11/2014 12:54, Thomas de Groot wrote:
> On 16-11-2014 12:17, Stephen wrote:
>> What causes cigarette lighter gas to flow from the refill into the
>> lighter? Is it gravity or pressure?
>>
>> Just because, Andrew is AWOL
>>
> 
> Pressure, My guess.
> 
> Thomas
> 
It's a liquid... pushed by its own vaporized gas on the free surface
(inside the refiller can).

To refill (quite an old practice, nowadays with no-refill lighters), the
difference of pressure (from empty lighter with nearly no more gas vs
the refill at whole pressure due to the big amount of liquid providing
enough gas on the free part) found on its way the liquid and push it to
the weakest part (the empty lighter)

That is for the butane lighters.

Now, if you are using an old Zippo, the refill is with nafta and there
is no pressure, just gravity, like when you pour a drink.

-- 
IQ of crossposters with FU: 100 / (number of groups)
IQ of crossposters without FU: 100 / (1 + number of groups)
IQ of multiposters: 100 / ( (number of groups) * (number of groups))

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