Conclusion: You can replace it yourself, but there are certain conditions – it’s not just a simple replacement. It must meet the requirements of compliance, sealing, leak detection, and verification. Otherwise, the replacement would be in vain and could even affect the cleanliness level.
1. When can you replace it yourself?
If the following conditions are met, you can replace it yourself:
You have personnel who understand equipment maintenance (electricians / equipment technicians are sufficient)
You have filters of the same specification, size, and qualified (with certificates and test reports)
After replacement, simple verification of air velocity, leak detection, and cleanliness can be done
The workshop / laboratory does not involve GMP, pharmaceutical, etc. high-level certification (or it is internally allowed to replace by yourself)
2. Key steps for self-replacement (simplified version)
Turn off the power, unplug the power supply
Remove the decorative cover, trim, and old high-efficiency filter
Clean the box, sealing groove, and replace the sealing rubber strip (aging requires replacement)
The new high-efficiency filter should have the arrow pointing towards the outlet direction and be evenly pressed
Loosen the screws diagonally and tighten them to ensure no air leakage
Turn on the machine to measure air velocity, and if normal, then perform PAO / dust particle leak detection
Record: replacement date, model, person, test results
Key point: Sealing is the soul. Air leakage = waste of effort, directly fails the inspection.
3. These situations are not recommended for self-replacement, please contact the manufacturer / professional personnel
Pharmaceutical, biological, GMP, sterile laboratories
Require third-party testing, auditing, factory inspection
Complex structure, sealed with liquid tank, DOP/PAO leak detection interface
You are unsure about the size, air volume, installation direction
You do not have a leak detection instrument and cannot confirm if it is qualified
4. Summary in one sentence
For ordinary laboratories / small workshops: You can replace it yourself, saving money and time
For those with certifications / high requirements: Do not replace it yourself, avoid audit risks
