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Hey Axel

The main flame falure valve Im using is a White Rodgers 784 Series
The thermocouple and pilot flame tubes come from it as well as the main gas supply.... I'm simple terms the gas comes from the cylinder, through a regulator and into the White Rodgers valve......

You hold in the knob and ignite the pilot flame (piezo) ,once the thermocouple has a little heat on it it makes just enough energy to hold the White Rogers valve open and lets you turn the knob and feed the gas to the jet and burner.

I have a very low pressure gauge (0-2.5 kpa) and needle valve (1/4" fittings and tube) on this low pressure side.
I found the White valve wasn't precise enough to control the burner so now I just use it to start things and then set it to full open and use the needle valve to control things....

I wouldn't think there is any problem with having the valve away from the burner.... (within reason)

I got all the parts except for brass tube and fittings from System Control Engineering in New Zealand but Im sure that type of company is everywhere.....

Im sure you could do things without all the flame failure stuff (White Rogers valve) but Im trying to develop a commercial roaster 4kg.and have to keep thinking about safety..
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