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Key points for selecting vacuum dehumidification equipment for precision parts：For precision parts, inspect moisture in blind holes and gaps and compare orientations and post-drying dimensional changes. Determine completion from material endpoints such as residual moisture, solvent residue or constant mass; record sample temperature, operating pressure and moisture regain after venting.

Degassing process verification and risk control before resin potting：Before resin potting, compare cured sections with and without degassing and record the mixing-to-treatment delay. Specify absolute pressure and gauge location; a pump ultimate-pressure rating is not the chamber operating pressure with a wet load.

Key points for selecting deaeration equipment before resin potting：Before resin potting, compare cured sections with and without degassing and record the mixing-to-treatment delay. Specify absolute pressure and gauge location; a pump ultimate-pressure rating is not the chamber operating pressure with a wet load.

Low-pressure drying process verification and risk control for packaging materials：For packaging materials, check layer adhesion, shrinkage and post-drying seal performance using stack-centre and edge samples. Check sample and tray contact with heated surfaces. Heat transfer changes at low pressure, so the sample core can still be warming after the controller reaches setpoint.

Key points for selecting low-pressure drying equipment for packaging materials：For packaging materials, check layer adhesion, shrinkage and post-drying seal performance using stack-centre and edge samples. Check sample and tray contact with heated surfaces. Heat transfer changes at low pressure, so the sample core can still be warming after the controller reaches setpoint.

Cavity sealing maintenance process verification and risk control：For chamber hold tests, fix temperature and isolation-valve state and record pressure change and door-seal condition. Record pressure-hold behaviour at the same temperature and isolation conditions, then inspect door seals, valves, joints, gauge lines and the pump.

Key points for selecting cavity sealing and maintenance equipment：For chamber hold tests, fix temperature and isolation-valve state and record pressure change and door-seal condition. Record pressure-hold behaviour at the same temperature and isolation conditions, then inspect door seals, valves, joints, gauge lines and the pump.

Pumping speed abnormality troubleshooting process verification and risk control：For abnormal pumping, separate pump performance, line resistance and sample outgassing using baseline comparisons. Repeat baseline and loaded checks after servicing or seal replacement; retain before-and-after curves to confirm recovery of the drying endpoint and atmosphere stability.