In the dust-free environment of an electronics factory, high-efficiency air filters are extensively used to maintain cleanroom standards. The maintenance of these filters is a significant cost in cleanroom upkeep, yet it is essential for ensuring air quality and operational efficiency. Understanding the proper maintenance and installation procedures for high-efficiency filters is crucial for meeting production environmental requirements.
During the packaging, transportation, and installation of air filters—especially high-efficiency ones—it is vital to follow the manufacturer’s guidelines. Over time, filters accumulate dust on their surfaces, which reduces filtration efficiency and increases resistance. This can affect the performance of central HVAC systems and cleanroom engineering, leading to lower airflow, reduced cleanliness, and decreased system efficiency. Timely replacement is necessary to meet cleanliness standards.
Here are key considerations for maintaining air filters:
1. Do not tear or open the filter bag or packaging manually before installation. Store filters according to the direction indicated on the package and handle them gently to avoid damage from vibration or collision.
2. Ensure correct installation direction for high-efficiency filters. When installed vertically, the corrugated plates should be perpendicular to the ground. Avoid any leaks, deformations, or damage at the frame connection. After installation, the inner walls must be free of dust, oil, rust, and debris.
3. Regularly inspect filters by visual observation or by wiping with a white silk cloth.
4. Before installing high-efficiency filters, thoroughly clean the cleanroom and the HVAC system. If dust is present, clean it again to meet the required standards. If installing in a technical ceiling or space, ensure those areas are also cleaned.
5. During transport and storage, place filters in the direction indicated by the manufacturer. Handle with care to prevent shocks or impacts, and avoid rough handling during loading and unloading.
6. Before installation, visually inspect the filter at the site. Check for damage to the filter paper, sealant, and frame. Confirm that dimensions meet specifications, and check for burrs, rust, or missing documentation. Only install certified filters that meet design requirements.
7. For cleanrooms with Class 100 or higher cleanliness, perform a leak test using the method outlined in "Cleanroom Construction and Acceptance Specifications" [JGJ71-90] before installation.
8. Align the arrow on the outer frame with the airflow direction. When installed vertically, ensure the folds of the filter paper are perpendicular to the ground.
9. For coarse or medium-efficiency plate or folded filters, position the galvanized mesh toward the return air side. For bag filters, ensure the bag length is vertical, not parallel to the ground.
10. Under normal conditions, flat or folded coarse/medium filters typically need replacement every 1–3 months. In less strict environments, they can be washed with a detergent solution, rinsed, dried, and reused. However, after 1–2 washes, a new filter must be used to maintain efficiency.
11. Bag-type coarse or medium-efficiency filters should be replaced after 7–9 weeks of regular use (8 hours per day).
12. Sub-high efficiency filters generally last 5–6 months under normal operation and should then be replaced.
13. Monitor differential pressure: replace coarse filters when pressure exceeds 250Pa, medium filters at 330Pa, and sub-high efficiency filters at 400Pa. Never reuse old filters once they are removed.
14. High-efficiency filters should be replaced if resistance exceeds 450Pa, or if airflow velocity drops below the minimum level even after replacing upstream filters. Also, replace if there is an irreparable leak. Otherwise, replace every 1–2 years depending on environmental conditions.
15. To maximize filter performance, keep the incoming air speed below 2.5m/s for coarse and medium filters, and below 1.5m/s for sub-high and high-efficiency filters. This helps maintain efficiency and extends filter life, reducing costs.
16. Filters should not be replaced while equipment is running. Coarse and medium filters can be changed without stopping fans, but sub-high and high-efficiency filters require the system to be shut down first.
17. Ensure the gasket between the filter and frame is tight to prevent leaks and maintain filtration effectiveness.
18. In high-humidity or high-temperature environments, select filters made with materials resistant to these conditions, including filter paper, partition plates, and frames.
19. In biological or medical cleanrooms, use metal-framed filters with non-corrosive surfaces. Avoid wooden frames to prevent bacterial growth and contamination.
Proper implementation of a structured filter maintenance plan ensures long-term performance, enhances air quality, and delivers significant economic benefits for the company.
Baby Product
Kids Dining,Baby Silicone Bibs,Baby Bibs,Silicone Baby Bibs
DONGGUAN BILLION GOODTOP INDUSTRIAL CO., LTD , https://www.bgoodtop.com