THE BUTTERFLY #2412 PRESSURE
Kerosene pressure stoves have been used for over a
century precisely because they are reliable and versatile. They
will work at high altitude and when burning poor quality fuel. And
they burn HOT, boiling 6 cups of water in less than 7 minutes, so
cooking or purifying water is fast.
(Above, photo of my pressure stoves
for testing: Primus No. 96 version 5,
late 1920's; Aida #100, 1960's; Butterfly #2412, current; Karan
Both the Primus No. 96 and Aida No.
100 shown in the photograph above were designed so the burner could be
removed and the fuel tank sealed, but those stoves have not been
available for years. The Butterfly #2412 is the only
pressure stove available today designed for really portable use! Combined with
the multi-fuel capabilities of this stove, this makes it one of the
most versatile and valuable stoves anyone could ask for to use in an
The Butterfly #2412 Brass Pressure stove is made
from solid brass. Included with your brass stove
are 3 removable stove supports, 3 pick tools for cleaning, a
wrench to disassemble the burner, and a brass cap that seals the
tank when the burner assembly is removed. It holds .9 litres of
fuel. Height is 21cm (8.25 inches), width 20cm (7.9 inches),
weight 1.25kg (2 lbs 12 oz), heat output maximum of 9000 btuh. It
will burn over 3 hours on a tank of fuel.
The Butterfly #2412 stove can be assembled quickly
The Butterfly #2412 stove can be assembled quickly
for use, then disassembled if required for packing up to move if
necessary. To assemble the stove, the three "L" shaped legs are first
fitted into corresponding slots on the bottom of the top plate, then
lined up and inserted into the hollow pegs soldered to the sides of
the fuel tank. There is a cap with a gasket on the top center of the
tank: remove and save the cap (screw the cap onto the end of
the pump handle), then use the supplied wrench and screw in the burner
assembly and tighten it with the wrench.
The Butterfly 828 pressure lantern makes a fine
companion piece to the Butterfly pressure stove. For more
information on the 828 lantern, click here.
is the source for Butterfly stoves and pressure lanterns and has them
INSTRUCTIONS FOR USE:
To light the #2412, first fill the tank
with clean fuel through a filter funnel* until it is about 3/4ths
full. Pour some alcohol* into the alcohol cup, make sure the air bleed
valve on the filler cap is OPEN, then light the alcohol. Just
before the alcohol burns up (easily visible), tighten the air bleed
valve on the filler cap, pump the manual pump on the side of the fuel
tank, and the stove should easily begin putting out heat. If the
ambient temperature is very low (below 40 F), it may take two fillings
and burnings of the alcohol cup to preheat the burner assembly
properly. If lighting outdoors, block any wind from blowing the heat
from the burning alcohol away from the burner. In an emergency,
virtually any fuel can be used in the alcohol cup for preheating, but
expect some sooting on the burner unit.
You can begin cooking immediately. If you need
more heat, just pump a few additional times to build more pressure
in the tank (Remove any boiling liquids on the stove first, though!).
You can hear the heat output differential, so there isnít a problem
regulating the BTU output. To lower the temperature, simply unscrew
the bleed valve a quarter turn and listen as the pressure lowers and
therefore the BTU output decreases, and tighten the bleed valve when
you have lowered the temperature sufficiently.
Let me give you an illustration. Bette wanted to
cook some rice on the little #2412. The first thing you need to do is
boil water, so I had the stove pumped up to produce a high heat. The
water started boiling in only a few minutes, and then the rice and
butter was put into the boiling water, which of course immediately
cooled the water below the boiling point. In a couple of minutes it
was boiling again, so I opened the bleed valve to lower the
temperature output to a gentle simmer, then tightened the bleed valve
again. The rice cooked perfectly without scorching on the bottom, and
I had some nicely cooked rice for lunch. Bette wanted to heat some
beans, so they went into small pan, I pumped up the stove about 5
strokes, and the beans heated to boiling quickly, as which time I
lowered the temperature (open the bleed valve for a moment) so they
could simmer. When the beans were cooked, Bette turned off the stove
by simply opening the bleed valve a half turn and leaving it open.
With 0.6 L of fuel in the tank, you have about 4
hours of cooking time available with the #2412: obviously, these
stoves are extremely fuel efficient! One liter equals 1.0567 quarts,
so a gallon of kerosene will yield from 24 to 32 hours of operation,
depending upon the pressure at which the stove is operated, which
should be enough for several weeks of cooking or heating water for
All kerosene pressure stoves follow the time
honored design principles of the old style gasoline torches: The fuel
is preheated in a tube until it volatizes, the vapor is blown through
a very small venturi jet in a nipple and burns completely as a
vaporized fuel/air mixture. Safety in terms of pressure is not a
factor, as the jet is always open...it is virtually impossible to
build up too much pressure in the tank. But that open jet design means
the tank is not sealed, so if the stove is to be transported after use
and fuel remains in the tank, be sure to transport the stove in the
upright position and with the bleed valve open. If you are
hiking or carrying the #2412 stove in such a way that it cannot be
carried upright, then use the supplied wrench to remove the burner
assembly and replace it with the brass cap, and tighten the bleed
valve on the filler cap. It only takes a couple of minutes to perform
this procedure, so it isnít time consuming or difficult.
Notice the "*" above? Those were put there to alert
you to avoid potential problems. Kerosene pressure stoves vaporize the
fuel through a tiny jet hole, remember? The stove comes with a jet
cleaner in case the jet becomes clogged. That, of course, is why you
should use a filter funnel when filling the fuel tank...why
borrow trouble with dirty fuel? Preheating with alcohol is best
done with the highest temperature burning alcohol, which means 91 to
95% alcohol, not 70% rubbing alcohol. Alcohol burns very hot, without
much of a visible flame and produces almost no soot. In an emergency
you could preheat using kerosene in the alcohol preheat cup, but
expect it to leave a soot deposit on the burner and require several
cups of fuel to achieve adequate preheating.
Can a kerosene pressure stove be used indoors in an
emergency? Certainly. They burn without noticeable fumes, and because
they burn kerosene it does not produce excessive carbon monoxide as do
gasoline stoves. [Always open a window a bit when using any device
with an open flame...they burn oxygen, too.] These stoves are too
small to support an oven, but with a
support stand to hold the
oven with the stove beneath, they easily put out enough heat to
properly heat the oven...it just isnít ideal for that purpose. The
#2412 is a pressure stove...they do have a sound. It isnít as loud
as a Coleman stove or lantern, but you can hear the mild roar of the
burner unit in operation, just as you can with a Primus kerosene
stove. Unlike the tiny Primus, however, the Butterfly #2412 is large
enough to use for daily cooking, if required.
Clean the inside of the fuel tank of new
units before use by rinsing with kerosene.
Once a year, clean the burner unit (including the
jet) and repeat step one. This will keep particles from clogging the
jet. If the burner of the #2412 is removed, always store it in a
sealed bag with the wrench and needle cleaning tools.
If the stove does not light, or burns off
center, clean the jet with the supplied needle.
If the #2412 stove is stored with fuel in the
tank AND the burner installed, open the bleed valve, otherwise
changes in barometric pressure can cause fuel to rise up through the
bleed valve and leak.
For transport with fuel in the tank, remove the
burner unit and store it in a sealed bag, and replace the burner
unit with the supplied cap (stored on the end of the pump handle),
and close the bleed valve on the filler cap.
Always use a funnel with a filter to fill the
fuel tank. Coleman filter funnels work well.
Never overfill the tank with fuel.
Leave at least 3/4'' of headroom above the fuel. There must be
air in the tank to pressurize with the pump!
Wait for the pre-heat alcohol to
almost burn out before pumping up the tank. Wear leather gloves when
pumping for safety.
Kerosene pressure stoves will burn diesel fuel, alcohol, stove oil, etc, in an emergency, but for
indoors use only kerosene is recommended.
In an emergency, the stoves can be pre-heated
with any fuel, but expect a lot of soot on the burner. The soot does
not degrade performance, but is pretty dirty to handle.
In storage, keep the separated
parts in small Zip-Lock bags. That way they are ready for use
when you need them.
Pages on this web
Kerosene Stoves -
Recommendations on different models
Stove Maintenance and Storage
Butterfly A-822, 22 wick, all-aluminum
premium stove. New!
Butterfly #2487, 16 wick stove. Butterfly #2412 Pressure
instructions for virtually any pressure stove.
Double Burner Stove;
good with any gravity flow stove.
Oven for Kerosene Stoves
Butterfly #2641, 10 Wick Stove
the least expensive emergency stove.
Butterfly #2698 Cook Stove -
THE Best Heavy Duty Cook Stove. Butterfly
#828R Pressure Lantern;
same for most pressure lanterns.
Mini kerosene heaters;
also mini stoves made from old brooder lamps.
Sad Iron stoves;
examples of, and wick replacement. Wicks
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and wicking for them.
Kerosene Stoves, Lanterns and Ovens
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