By replacing the internal consumables (O-ring, U-shaped cup seal), it becomes as good as new, and the replacement is very easy.
When stirring and pressure reducing pump are stopped and vacuum is maintained, the condition is very good by tightening the cap (2) as much as possible.
Can be used for vacuum, normal pressure, and micro-pressurization.
The vacuum accuracy is about 10^-5.
*If you need a stirring rod or plate, use a fluororesin stirrer.