Cng decompresses after filling ?

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Cng decompresses after filling ?

hey guys ,
i would like to share my experience after filling my cng tank last night i have noted the reading of cng meter and it shows 220 psi i come back and switched to petrol as during night i always switch to petrol next morning when i check the cng meter again it went to 190 psi i know for a fact theres no leaking cos i always make a note of my reading , does that means cng decompress after engine gets cold ? please share your knowledge thanks .

Gari.pk User 8949 asked on 17 Sep 2010 14:51:35 pm

1 Answer

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Huzaifa - on 17 Sep 2010 14:51:43 pm

There is a pressure drop in a closed vessel of gas if the temperature is lowered....wonder if you could recall boyle's, Charle's, & Temperature Laws applicable to gas behaviors...
Issi leay to banners lagay hotay hai CNG stations par " Thandi Gas, Full pressure, Ziyada mileage" etc, etc.
And that is why it is advised to get gas and other fuels when the temp outside has been cool for a while
Secondly it should be bars and not psi with the numbers you mentioned ....