Base Rotary

Base Rotary
What are the possible causes of the pressure loss in a bell jar? used for thermal evaporation, use cyropump?

after noted that the pumping system is based on the pressure of about 2 * 10 to the power of days before the ABT based torr.the -6 2 * 10 to the power of -7 torr.they also warn that the temperature of cyropump 1st and 2nd stage of looking sideways Abit high. What are the possible cause? planetary system are tools of rotor No cyropump fittedwith pump a molecular sieve trap of the right valve, vacuum gauges, safety devices, etc.. pls help

You either have an air leak. Or if there is something in the bell jar has evaporated and its vapor pressure has been reduced.

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