EnglishEnglish
Views: 0 Author: Site Editor Publish Time: 2026-03-31 Origin: Site
This article aims to strictly implement the three fundamental control standards for filters: standardized installation, standardized placement, and compliant storage. It details the execution requirements for the entire process and inspection protocols. By addressing high-risk issues at the source—such as improper manual installation, disorderly stacking and compression, and storage under inappropriate temperature and humidity—it comprehensively ensures filter seal integrity, filtration precision integrity, and structural stability. This effectively eliminates failures such as leakage, clogging, and damage caused by improper manual operation, significantly reducing rework, on-site after-sales complaints, and additional consumable waste, thereby ensuring the long-term stable and compliant operation of the filtration system.
All steps during filter installation require careful handling to prevent impact that could damage the filter.
Prepare installation tools such as alcohol, absorbent cloths, step ladders, utility knives, long-shaft screwdrivers, etc.
Before installing HEPA filters, a thorough cleaning of the cleanroom is essential. This prevents contamination of the filter by existing pollutants. "Thorough" means the entire cleanroom; if installing filters in a technical ceiling or plenum, those areas must also be comprehensively cleaned.
After cleaning the cleanroom and the HVAC system, the HVAC system must undergo a trial run for at least 12 hours continuously. Following this, the cleanroom should be cleaned again, and HEPA filters should be installed immediately after cleaning.
During the installation of HEPA or ULPA filters, handle them with care to prevent damage from severe vibration or impact.
Check the label on the HEPA filter to ensure consistency with the customer's order number, dimensions, and efficiency.
HEPA filters must only be unpacked from their inner PE bag inside the cleanroom after cleaning is complete.
Before removing the HEPA filter from its PE bag, carefully inspect the filter's appearance, paying particular attention to any damage or deformation of the filter media.
Whether using a gasket seal or a gel seal between the filter and frame, ensure that the gel-seal frame or the filter's gasket and the frame are wiped clean. If using a gel-seal HEPA filter, the gel level within the channel must meet design requirements, and there should be no sealant leakage at frame joints.
When installing gel-seal HEPA filters, it is recommended not to remove and reinstall the filter more than five times. Do not remove the filter too quickly, as this may cause the gel to adhere to the diffuser and result in loss.
Confirm the filters to be unboxed and those still boxed. Store them as shown in the correct diagram. Report any anomalies to the site supervisor immediately. (Handle with care; dropping or mishandling can cause media breakage.)
When opening a filter product, first remove the product from top to bottom. After removal, inspect the box for any damage or deformation.
When handling HEPA filters, always carry them by supporting the filter frame with both hands. (Never touch the filter media directly with fingers or sharp objects to prevent media damage leading to filter leakage and scrapping. Avoid rough handling; protect the filter media at all times.)
After opening, verify that the external box label matches the actual product specifications and quantity. Report any discrepancies to the factory immediately. The arrow on the filter frame label should align with the airflow direction. After opening, place the filter flat on a work surface for confirmation. (Never touch the filter media directly with fingers or sharp objects.)
During handling, take care to protect the filter's sealing gasket. (Never touch the filter media directly with fingers or sharp objects.)
When removing the inner packaging of the HEPA filter, do not use a knife to cut it open; tear it by hand instead. (Never touch the filter media directly with fingers or sharp objects.)
When installing HEPA filters, avoid pushing up with your head or holding the filter by its protective screen. (Never touch the filter media directly with fingers or sharp objects.)
When two people are handling the HEPA filter for installation, maintain balance and avoid twisting the filter. (Never touch the filter media directly with fingers or sharp objects.)
The number of people required depends on the filter size. For filters larger than 1200x600 mm, at least two people are needed. (Never touch the filter media directly with fingers or sharp objects.)
For installation on a gel-seal diffuser, first spray alcohol into the plenum box and wipe it clean with a clean cloth. After cleaning, inspect the diffuser for pinholes. If pinholes are found (which can cause leaks), they must be immediately repaired with silicone sealant.
When installing the HEPA filter, if the installation is vertical, the direction of the filter pleats should be perpendicular to the floor. (Never touch the filter media directly with fingers or sharp objects.)
Loosen the screws securing the filter to the plenum box (ensure screws do not press against the filter, affecting installation). Position the filter clamping blocks outward. Level the diffuser limit blocks. Then, carefully fit the gel-seal surface of the filter horizontally onto the diffuser knife edge; ensure no misalignment. (Never touch the filter media directly with fingers or sharp objects.)
After the filter is installed level, begin tightening the screws to secure it. Use a socket screwdriver; do not use an electric driver. Do not tighten the screws completely. Maintain a 1-2 mm gap between the diffuser knife edge and the filter flange to achieve a proper seal. The screws should secure the filter firmly but not be fully tightened. (Never touch the filter media directly with fingers or sharp objects.)
After all filters are installed using the above method, the installation personnel should collect the filter serial numbers and certificates. Based on the HEPA filter numbering drawing, fill in the corresponding product serial numbers on the HEPA Filter Installation Confirmation Checklist.
During transport, HEPA filters should be stored upright to avoid impact damage to the media. Protect from rain.
Handle with care during transport to protect the filter media.
The stacking height during transport should not exceed 2 meters. No other objects should be placed on top of the packaging to prevent damage, especially to the media. Besides height, secure the filters to prevent damage caused by vehicle vibration.
When storing in a warehouse (clean and dust-free), store upright with outer packaging intact. Stack according to the markings on the box (label side up). The floor or pallet should be flat, and the stacking height should not exceed 2 meters to prevent damage from tipping.
Filters should be stored in a dry, constant-temperature location. Warehouse temperature should be between 0°C and 40°C, with minimal fluctuation. Relative humidity should be less than 60% (do not store outdoors).
HEPA filters should not be stored for excessively long periods, as this can affect filter media performance. For standard gasketed filters, the storage period should not exceed one year. For gel-seal filters, the maximum recommended storage period is 6 months.
(Primary, Medium, HEPA Filters)
| | |||
| | | | |
| | | | |
| | | | |
| | | | |
| | | | |
| | | | |
| | | | |
| | ||||
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | ||||
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | |||
| | | |||
| | | | | |
| | | | | |
These filters must be maintained and stored by professionally trained personnel.
Replace filters regularly based on cleanroom cleanliness requirements. Recommended intervals: primary/medium filters typically every 3-6 months; HEPA filters typically every 12-18 months.
Filters should be replaced when resistance exceeds standard requirements based on the thickness and efficiency of primary, medium, and HEPA filters.
Regularly (typically every 2-3 months) use a particle counter to measure the cleanliness level of the clean area served by these filters. If the measured cleanliness does not meet requirements, investigate the cause (e.g., leakage, failed HEPA). If the HEPA filter has failed, replace it.
Based on actual usage, regularly (typically every 2-3 months) remove the media from the primary air filter for cleaning.
If airflow velocity decreases, first check if the surface of the primary filter is blackened. If so, this indicates that the pre-filter has accumulated significant dust and resistance has increased. Remove the non-woven fabric from the primary filter for cleaning or replacement.
If airflow velocity does not improve after replacing or cleaning the non-woven fabric, it indicates that the HEPA filter is clogged and resistance has increased; the HEPA filter should be replaced.
When replacing filters, power off the equipment first. Replace the air filter with a new one of the same specification and model. During installation, ensure the arrow on the filter label points in the direction of airflow and confirm a good seal to prevent leakage.
After replacing a HEPA filter, confirm there is no leakage around the frame. Use a particle counter for testing; normal operation can only resume once the technical specifications are met.
