205M 1108 Oxygen Combustion Vessel Operating Instruction Manual
1108 Oxygen Combustion Vessel Table of Contents Preface Scope — 3 Related Instructions — 3 Operating the 1108 Oxygen Combustion Vessel Precautions — 4 Special Alloy Construction — 4 A Chlorine-Resistant Bomb — 4 1108B Oxygen Combustion Vessel — 4 Other Special Purpose Bombs — 4 Allowable Sample Size — 4 Attaching the Fuse — 5 Liquids in the Bomb — 5 Closing the Bomb — 5 Filling the Bomb — 6 Firing the Bomb — 6 Recovering the Combustion Products — 7 An Optional Recovery Procedure — 7 Samples and Sample Hol
1108 Oxygen Combustion Vessel Preface Related Instructions Scope These instructions cover the procedures to be followed when using a Parr 1108 Oxygen Combustion Vessel to determine calorific values of solid or liquid combustible material in a Parr calorimeter, or when using an 1108 vessel in a 1901 Oxygen Vessel Apparatus to prepare solid or liquid samples for chemical analysis.
1108 Oxygen Combustion Vessel Operating the 1108 Oxygen Combustion Vessel Precautions Combustion with oxygen in a sealed bomb is a very effective and reliable method for releasing all heat energy obtainable from a sample and for preparing hydrocarbon compounds and carbonaceous materials for analysis, but there are certain precautions which must always be observed when using this equipment.
1108 Oxygen Combustion Vessel 45C10 Fuse Wire Set the bomb head on the A38A support stand when attaching the fuse and arranging the sample. A38A Head Support & Stand To attach the fuse: raise the cap, insert the wire through the eyelet, then pull the cap downward to complete the assembly. Attaching the Fuse Set the bomb head on an A38A support stand and fasten a 10 cm length of fuse wire between the two electrodes.
1108 Oxygen Combustion Vessel Firing the Bomb Filling the Bomb The instructions below describe a manual system using the 1825 Oxygen Filling Connection furnished with other Parr apparatus. Oxygen for the bomb can be drawn from a standard commercial oxygen tank. Unscrew the protective cap from the tank and inspect the threads on the valve outlet to be sure they are clean and in good condition.
1108 Oxygen Combustion Vessel Fire the charge by pressing the firing button on the ignition unit, keeping the circuit closed for about 5 seconds. The indicator light will come on when the button is depressed and will remain on while current flows through the fuse. When the fuse burns off and breaks the circuit, the light will go out. Normally this takes about ½ second, but it is good practice to keep the push switch closed for about 5 seconds regardless of the light.
1108 Oxygen Combustion Vessel Samples and Sample Holders Particle Size and Moisture Content Solid samples burn best in an oxygen bomb when reduced to 60-mesh, or smaller, and compressed into a pellet with a Parr Pellet Press. Particle size is important because it influences the reaction rate. Large particles may not burn completely and small particles are easily swept out of the capsule by turbulent gases during the rapid combustion.
1108 Oxygen Combustion Vessel 3601 Gelatin Capsules 43A6 Combustion Capsule with Adhesive Tape Seal way to destroy any trace of carbon or combustible matter which might remain in the capsule from a previous test. After heating, place the capsules in a clean container and handle them only with forceps when they are removed to be weighed on an analytical balance. Capsules should be monitored for wear. Do not use the capsule if the wall or base thickness is less than 0.025”.
1108 Oxygen Combustion Vessel calorimetry, and for the sulfur content of the gelatin (approximately 0.35%) if used for sulfur determinations. Blank tests must be run to determine the exact amounts. Gelatin capsules should always be stored in sealed bottles and handled with due regard for their hygroscopic nature. The blank tests should be repeated at frequent intervals since values determined on a weight basis will change if there are variations in the moisture content of the gelatin.
08 Oxygen Combustion Vessel Operating Suggestions Poor Combustion The difference in combustion characteristics of the wide variety of materials which may be burned in an oxygen bomb make it difficult to give specific directions which will assure complete combustions for all samples. However, two fundamental conditions may be stated.
1108 Oxygen Combustion Vessel Maintenance and Safety Instructions Bomb Maintenance Under normal usage Parr oxygen combustion vessels will give long service if handled with reasonable care. However, the user must remember that these bombs are continually subjected to high temperatures and pressures which apply heavy stresses to the sealing mechanism.
1108 Oxygen Combustion Vessel 1. Assemble the bomb with the head in the cylinder and count the number of turns required to bring the screw cap down firmly against the head. 2. Then open the bomb; remove the head and replace the screw cap, but turn it down to only one-half of the turns previously counted. This will usually be about four turns. 3. With the screw cap in this position, use a dial gage to measure the vertical deflection when lifting the screw cap upward. If this measurement exceeds 1/32 inch (0.
1108 Oxygen Combustion Vessel 1108 Maintenance Checklist Refer to page 12-13 & 16-17 of the 1108 Operating Instruction Manual for assembly instructions and parts diagram. 500 Test Maintenance Replace the following: Date 410A 415A 238A (4) 143AC 20VB Examine and replace if worn or cracked.
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1108 Oxygen Combustion Vessel Parts Key Item 1108 Parts Diagram Key Description 1 103A Screw Cap 103A6 Screw Cap, Heavy Duty (1108B) 2 230A O-ring 2-3/8 ID Buna-N 3 394A12 Head, Bare 394A12CL Head for Chlorine Service 101A 101A4 Vessel Cylinder sold as Part No. AA101A Vessel Cylinder sold as Part No. AA101A4 (1108B) 101ACL 101A4CL Vessel Cylinder for Chlorine Service sold as Part No. AA101ACL Vessel Cylinder for Chlorine Service sold as Part No.
1108 Oxygen Combustion Vessel Parts for the 1108 Oxygen Combustion Vessel 23 24 1 25 26 27 2 5 9 28 7 9 12 7 7 10 29 13 8 11 6 30 3 15 19 4 14 20 16 21 15 22 17 18 A A A A PROPRIETARY www.parrinst.
1108 Oxygen Combustion Vessel Parts for the 2901 Ignition Unit 200F11 1157E 139E21 W/ SA1332RP04 11 7 (LOAD) 174F ISO WARNING SYMBOL REF 6 8 34E2 9 2005E 8 11 9 10 12 10 12 TN1632HL 6 7 115V 8 2 11 115V 2014E 7 12V 5 1 3 12V 12 5 6 95F 4 (3) A59A2 A1580E 2000E MOUNT TRANSFORMER W/(4) UP18DM04 190F GROUND SYMBOL REF 1 (10 cm) (3) TN1332HL 4 (COMMON) 3 (7 cm) 2 A3299HC CHASSIS REF 1557E REF A3299HC COVER REF 2 1 1574E 2901 Ignition Unit Item A1673E2 1203EEE 1202EEE 2
1108 Oxygen Combustion Vessel Parts for the 1825 Oxygen Filling Connection 1825 Oxygen Fill Connection Item 4VB3 6VBBB 8VB2 9VB1 20VB 21VBBB 53A 112VB4AK 124VB A140VB A150VB 188A2 243VB 438VB A476A3 394HCJE HX0012TB024 Description Packing gasket Packing cover, brass Packing nut Union nut, brass, CGA540 Valve seat, PCTFE Lantern ring, brass Oxygen gage, 3-1/2”, 0-60 atm Valve needle Union nipple, brass, CGA540 Toggle relief valve Valve knob Filling connection body, bare Tube connector, male Elbow connecto
Revision 08/26/13
