Parr offers several special purpose oxygen vessels for calorimetry and analytical applications in sizes from 22 to 2000 mL. Inquiries for other applications are welcome.
1104 High Strength Vessel with Cage and Loop
The 1104 High Strength Vessel with Cage and Loop is a heavy-walled, 240 mL vessel. It is designed for combustion tests of explosives and other fast burning, high energy samples, that burn with extreme violence. The 1104 High Strength Vessel will handle samples liberating up to 12,000 calories using an oxygen charging pressure up to 45 atm (665 psig).
The sample is contained in a combustion cage that is designed to muffle the shock forces produced by explosive samples. The capsule is anchored to the cage so the explosion will not dislodge it.
While the combustion cage is essential for fast burning, high-energy samples, it may not be necessary to use the cage when testing samples which do not burn violently. In some cases it may be easier to secure complete combustion by substituting the loop capsule holder and omitting the cage.
1104B High Strength Vessel with Loop
The 1104B High Strength Vessel with Loop is designed for testing materials that do not produce the shock forces generated by explosive samples.
The 1104B is identical to the 1104 except that it does not include the combustion cage and heavy duty capsule necessary for testing explosive samples.
1104C High Strength Vessel with Vacuum Adaptation
The 1104C High Strength Vessel with Vacuum Adaptation is designed for testing explosives in a vacuum.
It is not accurate to test the amount of energy generated in an explosion when oxygen is present as the end products of the explosion will also be combustible. For example, any free Carbon and Carbon Monoxide will react with oxygen to form Carbon Dioxide and release an indeterminable amount of heat that did not come from the initial composition being tested. It is usually recommended to use 5 atm of Nitrogen or Argon environment through a fill and flush sequence in the 1104 High Strength Vessel with Cage and Loop to overcome this problem.
For those that would prefer to test in a vacuum there is the 1104C High Strength Vessel with Vacuum Adaptation. The 1104C is identical in specifications to the 1104. The only change in the 1104C is that the inlet valve on the vessel has been modified to allow for a vacuum to be pulled.
Testing Larger Samples
The 1104 High Strength Vessel is intended for samples of up to 1 gram not liberating more than 12,000 calories per sample. For testing up to 25 grams of high explosives per sample see the Parr Detonation Calorimeter.