[Clayart] sumi's burners

mel jacobson melpots2 at visi.com
Wed Oct 5 07:13:43 EDT 2016


leave them alone.  if they work, they work.

and, there are basically two types of burners that
potters use.
venturi, or natural primary air burners,  and they usually 
have some sort of flap, adjustable opening that will control 
the amount of primary air flowing down the gas tube, mixing 
with the gas.  too much air and flame jumps off the end of 
the burner, not enough air and flame burns inside the tube. 
(that is nasty)  in many cases when the perfect air flow is 
reached, the potter does not change the primary air setting.
(i have a bell shaped bellow on a a threaded pipe 3/4". i 
leave it alone unless i have a overloaded kiln and need a 
bit more air. but, most of the time it is fine the way it is 
set. part of the sweet spot.

the other type of course, is a forced air, or as it is 
called....`compressed air burner system`.
the forced air from an enclosed fan is mixed with the gas to 
produce a stronger more rich o2 flame.

it is the best system in most cases.  you can control your 
burners much better...but, it is a system that needs 
electricity, and is easily triple the cost of venturi 
burners.  in most cases you will find car kilns and more 
commercial variations of kilns complete with safety systems, 
auto shut offs, and even computer controlled gas controller 
complete with compressed air blowers.
(it is daunting to be in the middle of a firing and lose 
electric power.)

nils' burners do not have adjustable air intakes, he said we 
need all the air we can get.  keep the flame blue as can be.
(that is opposition to old burners that the potter would 
turn down the air to get an orange flame to produce more 
reduction. that just wasted gas.) and, potters got used to 
over reduced pots and lost color.  they were boring pots in 
my opinion.

others can give more detail about other burners systems. 
this is a quick explanation.
mel



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