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Air Filter Manufacturer: Introduction to Air Filter Installation
Release Date:
2022-04-21
To ensure effective air purification, the air filters in purification equipment generally need to be replaced at regular intervals. In most cleanrooms today, air filters are installed in the ceiling supply vents, and the installation method—as well as the pre-installation verification—directly determine whether the filter has any leakage points. Pre-installation verification is essential for establishing valid, objective conditions; therefore, careful attention must be paid to the proper methods and techniques during installation. Key precautions include: the air filter must only be replaced after the HVAC system’s supply airflow has been shut down; and the sealing gasket between the filter and its mounting frame must be tight and leak-free to guarantee optimal filtration performance.
To ensure effective air purification, purification equipment typically requires periodic replacement of its internal air filters. In most cleanrooms today, air filters are installed in the ceiling supply diffusers; the installation method and the pre-installation verification process together determine whether the filter has any leakage points. Pre-installation verification is essential to establish valid, objective conditions, so it is crucial to pay close attention to proper techniques and procedures during installation. Key precautions include: the air filter must be replaced only after the HVAC system’s supply airflow has been shut down; and the sealing gasket between the filter and its mounting frame must be tight and leak-free to guarantee optimal filtration performance.
Installation method for the air filter:
Prior to the installation of air filters, the cleanroom must be thoroughly cleaned and wiped down. If there is accumulated dust inside the air-conditioning system, it shall be cleaned and wiped down again to meet the required cleanliness standards. When filters are installed in technical plenums or suspended ceilings, these spaces must also be comprehensively cleaned and wiped down.
Prior to installation, the components shall be thoroughly cleaned. Air supply outlets for air filters that are installed and replaced in a cleanroom must have sealing gaskets installed at the joint between the outlet flange and the ceiling panel. For outlets installed and filter screens replaced in technical plenums, short stub pipes shall be pre-embedded during civil construction prior to installation; any gaps between the stub pipes and the ceiling panel must be tightly sealed. Outlets with damaged surface coatings shall not be installed. Upon completion of installation, the outlets shall be promptly connected to the ductwork, and the open ends shall be tightly sealed with plastic film and adhesive tape.
After the cleanroom and the purified air-conditioning system have met the cleanliness requirements, the purified air-conditioning system must be put through a trial run for at least 12 consecutive hours. Following this, the cleanroom shall be cleaned and wiped down again, after which the air filters shall be installed immediately. The filter packaging must be opened on-site for a visual inspection, covering such aspects as whether the filter media, sealing compound, and frame are undamaged; whether the side lengths, diagonal dimensions, and thickness conform to the specified requirements; whether the frame has burrs or rust spots (for metal frames); and whether a certificate of product qualification is available and whether the technical performance meets the design requirements. Leak testing shall then be conducted. Only filters that pass both the visual inspection and the leak test shall be installed without delay. During installation, the filters should be properly matched according to their individual resistance values: for unidirectional airflow systems, the difference between the rated resistance of each filter and the average resistance of all filters on the same diffuser or supply air outlet surface shall not exceed 5%.
When installing the air filter, the arrow on the frame must align with the direction of airflow. When the filter is installed vertically, the pleat seams of the filter media should be perpendicular to the floor. Regardless of whether sealing is achieved using gaskets, pressure-sensitive adhesive, negative-pressure sealing, liquid-seal tanks, or double-ring seals, the surfaces of the packing material, the filter frame, the frame itself, and the liquid-seal tank must all be thoroughly cleaned before installation.
Keywords:
Air filter, filter
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Nantong Lushen Environmental Protection Purification Materials Co., Ltd.
National Unified Business Consultation Hotline
Building 28, Jingyuan Ruigu Ecological Technology City, Chongchuan District, Nantong City, Jiangsu Province
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