دانلود پاورپوینت safe use and operation of vacuum lines

دانلود با موضوع دانلود پاورپوینت Safe Use and Operation of Vacuum Lines
تعداد اسلاید های فایل: 14 اسلاید
شرح مختصر:

OutlineStarting Up
Shutting Down
Cleaning Manifold
Changing Pump Oil
Dealing with Liquid O2

Starting UpPPE Needed: Lab Coat, Gloves, Safety Goggles/Glasses

1. Ensure that the manifold stopcocks, as well as all seals, are properly greased.Notes for Starting Up

2. Check to see that the vacuum trap is dry and clean.
Depending on whether you have one or two traps, you will have to refill the dewar(s) every 6-8 or 12 hours, respectively.

Make sure the system is under vacuum while any portion is under liquid nitrogen.  Otherwise, oxygen could condense, which could result in a serious explosion (see below).  

3. Make sure that there is enough Liquid N2 on hand to fill the dewar.

4.  Insert traps into empty dewars.

5. Ensure that all valves are closed, and start or open line to the vacuum pump.

6. Fill the dewar with liquid nitrogen. Wrap the top with a towel, cotton, glass wool, or aluminum foil.

7. Watch the gauge to ensure that the pressure is dropping.