The overall service life of the horizontal flow ultra-clean workstation is 5 to 10 years. Core components need to be replaced periodically; proper maintenance can significantly extend the lifespan and ensure cleanliness.
1. Service Life (Whole Machine and Core Components)
1. Whole Machine Service Life
Normal conditions: 5–8 years (ordinary laboratories, moderate usage frequency)
Good maintenance + clean environment: 8–10 years (even longer)
High load / high pollution scenarios: It is recommended to conduct a comprehensive performance assessment every 5 years to determine whether a major repair or replacement is necessary.
2. Core Component Replacement Cycle
| Composant | Replacement / Maintenance Cycle | Change the basis for judgment |
| Filtre primaire | Weekly cleaning; replace every 3-6 months (for high dust content, replace every 1-3 months) | Severe dust accumulation, high resistance, and decreased wind speed |
| High-efficiency particulate air filter (HEPA) | 2-3 years (regular); 1-2 years (high load) | Wind speed < 0.25m/s, leakage, and non-compliance with cleanliness standards |
| Ventilateur | Design life of 5 to 8 years | Strange noises, vibrations, and continuous decrease in air volume |
| Ultraviolet lamp | 2000 – 3000 hours (approximately 1 year) | The brightness has significantly decreased and turned dark. |
| Lighting / Circuit | LED lights: 3 – 5 years; Circuit: 5 – 10 years | Doesn’t light up, poor contact, aging |
II. Full-cycle Maintenance Plan (Daily – Weekly – Monthly – Quarterly – Annual)
1. Daily Maintenance (After each use / Daily)
Cleaning and Disinfection: Wipe countertops, inner walls, and glass windows with 75% alcohol; handle spills immediately
Operational Specifications: Do not stack items or perform dust-producing operations; Move gently to avoid air turbulence
After Use: Remove waste → Clean → UV lamp irradiation for ≥ 30 minutes (Person away)
2. Weekly Maintenance
Primary Filter: Remove and clean the vacuum / Wash (nylon washable, paper directly replace), dry and reinstall
Appearance Cleaning: Clean the casing and intake grille; Check if the UV lamp is functioning properly
Fan Inspection: Listen for any abnormal sounds, check if the wind speed is stable
3. Monthly Maintenance
Air Speed Testing: The air speed at the outlet should be between 0.3 – 0.6 m/s; If below the lower limit, clean the primary filter first
Electrical Inspection: Check for any damage or poor contact in power cords, plugs, and switches
Air Flow Test: Observe if the horizontal flow is uniform without turbulence using smoke / thread
4. Quarterly Maintenance
Filter Evaluation: If the wind speed is still insufficient after cleaning the primary filter, check if the high-efficiency filter is clogged
Sealing Inspection: Check for leaks in the cabinet, window, and filter frame
Function Verification: Check if the lighting, fan speed adjustment, and alarm functions are normal
5. Annual Maintenance (Performed by professionals)
High-Efficiency Filter Leak Detection: Use PAO/DOP method to detect leakage; Efficiency ≥ 99.97% @ 0.3 μm
Cleanliness Verification: Dust particle count, fall bacteria detection
Fan Inspection: Lubricate bearings, check motor performance, clean air ducts
Electrical Safety: Inspect insulation, grounding, and check for aging of wiring
III. Key Points for Longevity Extension
Prioritize Filters: Timely replacement of the primary filter can significantly extend the life of the high-efficiency filter and reduce the load on the fan
Environmental Control: Place the equipment in a clean area, away from dust-producing / humid / high-temperature sources; Add pre-filter at the intake
Standard Operating Procedures: Prohibit open flames, strong corrosive reagents; Do not block air flow channels
Record and Traceability: Establish maintenance records, documenting wind speed, pressure difference, replacement of components, and test results
IV. Forced Replacement / Scrap Judgment
High-Efficiency Filter Leakage, Damage, or Failure to Meet Verification Standards for Two Consecutive Times
If the wind speed is consistently below 0.25 m/s after cleaning the primary filter and replacing it, there is no improvement
Abnormal Fan Noise, Severe Vibration, or Failure to Run Stably After Repair
Corrosion of the Cabinet, Sealing Failure, and Unable to Repair to Compliance State
