It’s about 98% of the wet bit inside the machine
Water (H2O) and the nasty Potassium Hydroxide is the common mix
Electricity in the form of DC is passed though the mixture and
breaks down the water into Hydrogen and Oxygen. As you use the gas
the water gets used up and the potassium mixture gets stronger, but
you just let the pressure out the machine open the top and refill
with distilled water. Don’t use tap water as it will fill the machine
with calcium etc.
When burnt the Hydrogen and Oxygen form heat and water. It’s quite
strange to see water running away if you play the flame on a metal
Note hydrogen and Qxygen burn at about 3000C far to hot to work
with. So you bubble the gas through MEK or Meth’s this adds extra
fuel to the gas without increasing the oxygen. So not enough oxygen
to burn all the fuel which lowers the flame temperature. So by
selecting the fuel you put in the bubbler is the only way of
controlling the heat. The torch only has an on/off control. The size
of the tip controls how big the flame is, not how hot it is.
Very good for small work, but most machines only produce a small
amount of gas so although the temperature is high the energy is quite
low, hence only good for small jobs. But great at them, also no gas
to carry around and the bubbler acts as a flash back control. But if
the flash back gets as far as the tank I’m told it don’t go bang.
Love mine, and very easy to strip down and clean. Just to remember
that Potassium hydroxide is a base chemical and will burn in contact
with most things, burns through a newspaper quite quickly. So Eye
protection and long rubber gloves are a must. But in normal use no
problems at all.
You just need to remember that if the gas generation light does not
go off after a few seconds when the torch is turned off you have a
leak. So when I turn mine on I always wait for the first turn off
before moving away from the machine as a quick and easy safety check