free gas

[lor]

hi,
Gas is charged by volume at the gas meter,if the pressure is raised (by adjusting thr meter govenor) does this mean you get more gas for your money?
Conversely if the pressue at the meter is low (15mb say) then are you paying more for your gas?

 

[Rob]

Domestic gas appliances are designed to work at 20mb or below.

So no. nice try though...

Also the increase in pressure would also increase the volume of gas.

 

[corgiman]

Domestic gas appliances are designed to work at 20mb or below.

So no. nice try though...

Er I thought they all had to work a 20 or above

I am probably wrong but wot appliance works on less that 20mb rob?

 

[sambotc]

Domestic gas appliances are designed to work at 20mb or below.

So no. nice try though...

Er I thought they all had to work a 20 or above

I am probably wrong but wot appliance works on less that 20mb rob?

?

 

[namsag]

So that would mean if i only have my water tap on slow my water meter won`t register as much water passing as if i have tap on full blast...

Gas meters measure how much passing through them. regardless of pressure. Couple of things that affect them very very minutely is if the gas passing through them is hot or cold as the hotter it is the more it expands. Also a noisy meter is benefiting the customer as it is not registering properly due to wear

 

[Rob]

Domestic gas appliances are designed to work at 20mb or below.

So no. nice try though...

Er I thought they all had to work a 20 or above

I am probably wrong but wot appliance works on less that 20mb rob?

What boiler/appliance has a burner pressure of more than 20?

 

[sambotc]

bunsen burner?

 

[namsag]

Nope 20mbar is the right pressure which is why govenors are set at 21 to allow for the 1mbar loss in the pipework . Its in the book all to do with pulling the right amount of air in with it for burning.

And the bunsen burner is mentioned as an example

 

[gas4you]

Are we all getting confused with gas valve inlet working pressure as opposed to appliance burner pressure?

Corgiman wish you could send a few pints to me I'm stuck in and run out of Grolsh & Bacardi

 

[Rob]

Are we all getting confused with gas valve inlet working pressure as opposed to appliance burner pressure?

Corgiman wish you could send a few pints to me I'm stuck in and run out of Grolsh & Bacardi

Doesn't matter. In theory as long as the inlet pressure is above or the same as the burner pressure it works fine.

Corgiman said theyre designed to work above 20mb yet there isnt any domestic appliance that need thats much.

anyway...

 

[sambotc]

Yer possibly, but it surely depend's on where you are taking the reading from?
Although the working pressue is measured at 20mb the appliance isn't actually using it at that pressure is it?

(and that is a question not a sarcy comment)

 

[namsag]

Agree with appliance dont work at that pressure but it`s in the corgi book that gas at 20mbar is the ideal pressure for an atmospheric burner to work

 

[gas4you]

I agree rob, but all appliances are designed for an inlet pressure of 20mbar regardless of what burner pressure is required by manufacturers.

 

[sambotc]

So everyone's right, its just confussion over actual and theoretical values?

 

[corgiman]

I agree rob, but all appliances are designed for an inlet pressure of 20mbar regardless of what burner pressure is required by manufacturers.

Me too

I really wasnt being argumentative just thought thwat rob could answer the question I have been asking for years ie "why 21 mbar" CORGI and Manufacturers have all said the old chestnut "its a grey area" when I have asked the question

if the inlet pressure is lets say 17 but the MI state the burner pressure should be 14mbar whats the problem???

Love to know the answer I would