14
Parr Instrument
Oxygen Combustion Bombs
Bulletin 4700
P
arr offers a number of special purpose oxygen bombs,
some of which are described briefly below. Users inter-
ested in any of these or other special-purpose bombs are
urged to contact Parr for additional details.
No. 1105 Vacuum-tight Bomb.
This 340 mL oxygen bomb has
the same capacity as the 1108 general purpose bomb, but it is
designed for applications which require the bomb to be evac-
uated before or after firing. It has a one-piece head with inlet
and outlet valve bodies machined as integral parts of the head
to eliminate threaded joints at these locations. An 1824 oxygen
filling connection with snap coupling is required.
No. 1106 Inverted Bomb.
This bomb is the same as No. 1105,
but designed to operate in an inverted position with all fittings
at the bottom of the chamber so that hot gases strike only the
smooth surfaces of the inverted cylinder. This arrangement is
advantageous when testing rocket propellants and materials
which burn with an unusually hot flame.
No. 1105C and 1106C Platinum-lined Bombs.
These 1105C
and 1106C bombs are fitted with a platinum liner for complete
protection against highly corrosive combustion products. All
inner surfaces are covered with platinum and inner fittings are
made of a platinum – 10% iridium alloy. Once installed, the
liner remains firmly in place. Platinum fuel capsules and fuse
wire are required.
No. 1107 Semimicro Bomb.
This 22 mL bomb is the smallest
Parr combustion bomb. It will accommodate samples ranging
from 25 to 200 milligrams liberating up to 1200 calories.
Samples can also be burned in inert atmospheres when
testing heat powders, pyrotechnic mixtures and slow-burning
thermite types with self-contained oxidizers. It requires a
wrench and socket for holding the bomb and an 1824 filling
connection.
No. 1104 High-Strength Bomb.
This is a 240 mL, extra-heavy
oxygen bomb for combustion tests with gun powder, explo-
sives and other samples which burn with extreme violence. It
will handle samples liberating up to 12,000 calories using
oxygen charging pressures up to 45 atm. Extra strength is
built into all parts of the bomb. A removable combustion cage
can be installed to baffle the combustion forces when treating
fast-burning high-energy samples.
No. 1121 Large-Capacity Bomb.
This is an 1850 mL oxygen
bomb developed for users who want to analyze slow-burning
cellulosic materials using larger samples than can be treated
in the 1108 bomb. It will accommodate samples weighing up
to 10 grams using oxygen charging pressures up to 20 atm.,
but these limits vary and must be checked experimentally for
each sample. The bomb will hold vacuum, making it particu-
larly useful for determining trace amounts of tritium, carbon-
14 or heavy metals in vegetable matter.
No. 1122 Large-Capacity Bomb.
Same as 1121 except for the
smaller capacity of 920 mL.
ORDERING INFORMATION
1104
High pressure oxygen bomb, 240 mL, with capsule
support cage and one 217A combustion capsule and
5A3 loop electrode.
1104B
High pressure oxygen bomb, 240 mL, with 5A3 loop
electrode. (No combustion cage and no capsule).
1105
Oxygen combustion bomb, 340 mL, Carp. 20Cb-3
stainless steel.
1105C
Oxygen combustion bomb, 340 mL, platinum lined.
1106
Oxygen combustion bomb, 340 mL, inverted, Carp.
20Cb-3 SS.
1106C
Oxygen combustion bomb, 340 mL, inverted, platinum
lined.
1107
Semimicro oxygen bomb, 22 mL.
1121
Oxygen bomb, 1850 mL, T316SS with two valves and
0-3000 psi pressure gage.
1122
Oxygen bomb, 920 mL, T316SS with two valves and
0-3000 psi pressure gage.
1105
1107
1106
1104
Special Oxygen Bombs
1121
