On 16/11/2014 12:22, Le_Forgeron wrote:
> 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.
>
You are both saying pressure and yes I am talking about butane lighters.
Consider this, the pressure differential between the gas cylinder and 
the lighter is equalised within a fraction of a second. Yet still the 
liquid flows after that.


-- 

Regards
     Stephen

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