Rotary evaporator vacuum can not pump up solution

1. There is solvent in the container, which is limited by the pressure of the saturated injector.

    Empty the solvent and try the empty bottle.

2. The capacity of the vacuum oil pump is reduced.

    Vacuum oil pump for oil (water), cleaning and maintenance.

3, vacuum tube, loose joints, vacuum gauge leak.

   Detect and eliminate piece by piece along the vacuum line.

4. Use the magnetic particle flaw detector for pressure-holding test. In the absence of any solvent, turn off all external butterfly valves and pipelines, keep pressure for one minute, the vacuum gauge pointer should not move, indicating good air tightness.

On the contrary, 1 re-assemble, wipe the glass wool sandwich panel, clean it with vacuum grease, and tighten the flanges.

2 Update the failed seal.

5. There are debris in the discharge valve and pressure control valve.

  Cleaning.

6. The glass wool cotton sandwich panel is damaged.

   Update or fix.