hi all,i dont quite understand how Liquid Vapour FSD's work

[Glenn042]

hi all, i am puzzled... i'm studying FSD's at the mo and saw that cookers have something called a liquid vapour FSD...from my understanding it relies on a bellows expansion to go to a full flame...if the flame goes out then i understand that the gas is then shut off by the device...but what about the by-pass?....is gas still passing thru that?..if so then how safe is it?, i would appreciate some help on this thanks

 

[tamz]

Rather than try to explain it to you have a read of this which was easily found with a google

[DLMURL]http://www.radmidlands.co.uk/ControlsDom.pdf[/DLMURL]

And what about the bypass...........don't stick your head in the oven. It doesn't work anymore

 

[Reg Man]

Mercury liquid filled probe is in contact with the flame (Pilot or burners bypass rate) Capillary tube is connected to bellows, which is attached to the gas valve on the burner gas supply. The heat causes the liquid to expand, which causes the bellows to lift the gas valve and hold it open to full rate. If the flame were to fail the probe will cool and the mercury vapour contracts back to liquid.closing the bellows and valve.

 

[fuzzy]

by pass is for low light

 

[kirkgas]

by pass is for low light

i would describe the by pass, as the relight feature, ie when the oven reaches temp the main burner goes out, when you open the door or turn the stat up the core temp drops and the main burner needs to relight, if it opens it needs something to light it, which is the by pass,

 

[fuzzy]

i agree, but low light is the term ive always used