418M 1108P Oxygen Combustion Vessel Operating Instruction Manual
1108P Oxygen Combustion Vessels Preface 3 Operating Suggestions 11 Scope 3 Poor Combustion 11 Related Instructions 3 Oxygen Charging Pressure 11 Customer Service 3 Maintenance and Safety Instructions 12 Bomb Maintenance 12 Operating the 1108P Oxygen Combustion Vessel 4 Precautions 4 Bomb Repairs and Proof Tests 13 Special Alloy Construction 4 1108P Maintenance Checklist 14 A Chlorine-Resistant Bomb 4 1108BP Oxygen Combustion Vessel 4 Parts 1
1108P Oxygen Combustion Vessels Preface Related Instructions Scope These instructions cover the procedures to be followed when using a Parr 1108P Oxygen Combustion Vessel to determine calorific values of solid or liquid combustible material in a Parr calorimeter, or when using an 1108P Vessel in a 1901 Oxygen Bomb Apparatus to prepare solid or liquid samples for chemical analysis.
1108P Oxygen Combustion Vessels Operating the 1108P 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.
1108P Oxygen Combustion Vessels 845DD2 Cotton Ignition Thread A38A Head Support & Stand To attach the fuse either twist or tie the cotton thread to the A40DD2 semi-permanent fuse wire. Set the bomb head on the A38A support stand when attaching the fuse and arranging the sample.
1108P Oxygen Combustion Vessels Filling the Bomb Firing the Bomb The instructions below describe a manual system using the 1825 Oxygen Filling Connection furnished with other Parr apparatus. The electric current for firing the bomb should be drawn from a Parr 2901EB Ignition Unit connected to an 115V 50/60Hz grounded electrical outlet. (For 230V 50/60Hz use a 2901EE Ignition Unit).
1108P Oxygen Combustion Vessels Fire the charge by pressing the firing button on the ignition unit, keeping the circuit closed for about 2 seconds. The indicator light will come on when the button is depressed and will remain on while the button is depressed. If the indicator light does not come on when the firing button is pressed there is either a fault in the 2901 or an open circuit in the system. Check for voltage between the 10 cm and common terminals of the 2901.
1108P Oxygen Combustion Vessels 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.
1108P Oxygen Combustion Vessels 3601 Gelatin Capsules 43A6 Combustion Capsule with Adhesive Tape Seal ished with an abrasive to remove any ash or other surface deposits. Heating in a muffle is also a good 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.
1108P Oxygen Combustion Vessels 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.
08P Oxygen Combustion Vessels 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.
1108P Oxygen Combustion Vessels Maintenance and Safety Instructions Bomb Maintenance Under normal usage Parr oxygen bombs 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. The mechanical condition of the bomb must therefore be watched carefully and any parts that show signs of weakness or deterioration should be replaced before they fail.
1108P Oxygen Combustion Vessels 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.
1108P Oxygen Combustion Vessels 1108P Maintenance Checklist Refer to page 12-13 & 16-17 of the 1108P Operating Instruction Manual for assembly instructions and parts diagram. Date 50 to 100 Test Maintenance Date Date Date Date Date Replace 840DD2 Heating Wire Clean electrodes 500 Test Maintenance Replace the following: Date 230A 415A 238A (4) 143AC 20VB Examine and replace if worn or cracked.
Notes www.parrinst.
1108P Oxygen Combustion Vessels Parts 1108P Parts Diagram Key KEY ITEM DESCRIPTION 103A SCREW CAP (1108P/1108PCL) 103A6 HEAVY DUTY SCREW CAP (1108BP/1108BPCL) 230A O-RING 2-3/8 ID BUNA-N 394A18 OXYGEN VESSEL HEAD, BARE 394A18CL OXYGEN VESSEL HEAD, BARE FOR CHLORINE SERVICE 101A OXYGEN VESSEL CYLINDER (1108P) 101ACL KEY ITEM A420A VALVE NEEDLE WITH KNOB (NOS.
1108P Oxygen Combustion Vessels Parts for the 1108P Oxygen Combustion Vessel 23 24 25 1 26 27 2 28 7 7 29 5 9 9 12 10 7 7 8 19 6 13 30 3 15 15 14 14 20 4 16 33 17 34 32 35 31 31 www.parrinst.
1108P Oxygen Combustion Vessels 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 3 2014E 7 12V 5 8 2 11 115V 12V 1 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
1108P Oxygen Combustion Vessels 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 connec
418M R07 10/10/14
