فایل های مشابه شاید از این ها هم خوشتان بیاید !!!!
توضیحات محصول دانلود پاورپوینت Safe Use and Operation of Vacuum Lines (کد14137)
دانلود پاورپوینت Safe Use and Operation of Vacuum Lines
\nSafe Use and Operation of Vacuum Lines
\n\n عنوان های پاورپوینت :
\n\nSafe Use and Operation of Vacuum Lines
\nOutline
\nStarting Up
\nNotes for Starting Up
\nShutting Down
\nNotes for Shutting Down
\nCleaning
\nChanging Vacuum Pump Oil
\nChanging Vacuum Pump Oil, continued
\nWhat to do if Liquid O2 is Condensed in Trap
\nDealing with Condensed O2
\nDealing with Condensed O2, cont’d
\n\n \n\n \n\n
\n\nقسمت ها و تکه های اتفاقی از فایل\n\n \n\nCleaning\n\nPPE Needed: Lab Coat, Gloves, Safety Goggles/Glasses\n\nSupplies Needed: Apiezon M Vacuum grease, Hexanes\n\nCarefully disassemble the system (FRAGILE!) and clean with hexanes, disposing of it in normal organic waste.\n\nIf necessary soak glass manifold in base bath (isopropanol with added potassium hydroxide).\n\nCleaning\n\nRe-grease joints with Apiezon M Vacuum grease (orange tube), using a heat gun to gently heat the joints before applying grease.\n\nChanging Vacuum Pump Oil\n\nPPE: Lab Coat, Gloves, Safety Goggles/Glasses\n\nTools and Supplies: Screwdriver, Tygon or Latex Tubing 18-36 inches in length, Gloves, Squirt bottle of hexanes, 4 L bottle of Pump Oil, Empty container for waste oil.\n\n1. Ensure vacuum pump is off.\n\n2. Use screwdriver to disassemble the hose from the pump to the manifold.\n\n3. (Unplug and place pump on bench top (HEAVY!\n\n4. Find an empty oil container or any other 2-4 liter container for pump oil waste.\n\n5. Making sure to attach a latex or tygon tube to the drainage nozzle, open and allow for the oil to empty as much as possible. You may have to tilt the pump to drain all of the oil.\n\nChanging Vacuum Pump Oil, continued\n\n6. Partially fill with fresh pump oil. Seal the top with a vulcanized rubber stopper. Plug in and run the pump for 1 minute. Drain.\n\n7. You may have to re-repeat step 6 depending on how much particulate matter you see in the oil. Otherwise, add fresh oil to the fill line in the pump oil window.\n\n8. (Place pump on the floor (HEAVY!\n\n9. Reassemble the pump and plug in.\n\n10. Done!\n\nThe vacuum pump oil should be changed at least every three months or more often depending on use.\n\nWhat to do if Liquid O2 is Condensed in Trap\n\nOxygen is characterized by a light blue gas in low concentrations or light blue colored liquid.\n\nIt is highly explosive in the presence of organic compounds, including the grease used for the system.\n\nIt is a very dangerous situation to have condensed liquid oxygen and should be treated accordingly.\n\nDealing with Condensed O2\n\n1. If the liquid nitrogen dewar is removed and the liquid in the traps has a blue color or if any liquid is observed, then assume you have liquid oxygen in the trap.\n\nImmediately replace the liquid nitrogen to keep the traps cold. (Note: the longer the liquid nitrogen is there, the more oxygen is condensed. Only do this step very temporally, 1-2 minutes, to get ready to vent the traps as described below; otherwise do not do this.)\n\nInform others of the situation and evacuate the lab area except for a buddy at a safe distance.\n\n4. Place a blast shield around the traps and remove any nearby organic materials.\n\nDealing with Condensed O2, cont’d\n\n5. Remove the liquid nitrogen dewar, quickly vent the system, and if possible lower the hood sash completely\n\n6. Immediately leave the vicinity of the lab and warn others not to enter.\n\nAfter the system has warmed to room temperature consider the traps still dangerous . Liquid oxygen will not be present, but organic peroxides may have formed. Pour liquid into a clean beaker and flush assembled trap 5 times with water. Do this behind the blast shield and with the sash lowered.\n\nCheck the solvent for peroxides using a potassium iodide test strip. If a purple color forms on the text paper, peroxides are present. In that case, reduce solution by adding sodium thiosulfate or sodium sulfite before disposing of waster.\n\nAs soon as is safely possible, make sure your research director is informed of the situation.\n\n \n\n \n\n30 تا 70 درصد پروژه | پاورپوینت | سمینار | طرح های کارآفرینی و توجیهی | پایان-نامه | پی دی اف مقاله ( کتاب ) | نقشه | پلان طراحی | های آماده به صورت رایگان میباشد ( word | pdf | docx | doc )
