When installing the chemical filter, avoid dragging, collision and uneven force from damaging the sealing edge. The integrity of the gasket, clean contact surface and correct compression are important conditions for reducing bypass. Additional compression cannot be used to cover up damage. The sealing edge is only a few millimeters wide, but it determines whether the air will go through the filter element or through the bypass.

Why does sealing edge damage have such a big impact?

The sealing gasket of the chemical filter is usually arranged along the perimeter of the frame with a limited width. After being pressed, it fits the sealing seat of the frame to form a continuous sealing line. Once this sealing line becomes curled, cut, or partially detached, untreated air will bypass the media through the gap. Since the resistance of the chemical filter section is usually higher than that of the particle filter section, the bypass air is more likely to go through the gaps with low resistance, and the actual impact of sealing defects may be more obvious than it appears from the outside. When the outlet gas detection is abnormal, damage to the sealing edge is one of the links that needs to be prioritized for investigation.

Injuries mostly occur in the two stages of handling and pushing.

Bumps to the sealing edge rarely occur during normal operation, and most occur during handling, temporary storage, and pushing into the frame. Grasping the sealing edge with hands during transportation, placing the filter element against the wall, or leaving it at random after being unpacked may cause squeezing or scratching. When pushing into the frame, the sealing gasket rubs against the edge of the frame, the buckle is scratched, and there are burrs or foreign matter in the groove, which may also cause curling or splitting. The compact filter element on the equipment side has a small space, a short push path but many interference points, so you also need to pay attention. For questions about packaging and handling before installation, please refer toWhich shipping packaging needs to be removed when installing a chemical filter?。

Preparing frames and channels before installation

To avoid damaging the sealing edge, half the time is spent before installation. The frame seal seat should be checked for burrs, rust chips, old seal residue and deformation, foreign matter in the groove should be cleaned, and there should be no scratches on the pushing path. Heavier modules should be supported with appropriate support to avoid using the sealing edge to bear the load. If the frame itself is deformed or rusted, the flatness of the sealing surface has been affected, and the fit may be discontinuous even if the gasket is intact. For issues involving framework status, please refer toCan the old chemical filter still be used if its frame is rusty?。

Pressing should be uniform and over-pressure should not be used to cover up defects.

When it is found that the seal is not tight, increasing the pressing force is not the solution. Overpressure may cause local deformation of the gasket, uneven pressure on the medium, or even damage the frame. The correct approach is to confirm that the sealing gasket is in the correct position, the contact surface is clean, and the pressing parts are evenly stressed. After installation, visually check whether the sealing line is continuous, and if necessary, check the outlet gas and air volume under operating conditions. For the chemical filter section of the FFU, the sealing surface is usually connected to the fan box interface, and the pressing method and maintenance space need to be confirmed together.

Aili industrial supporting equipment

For problems such as bruises on the sealing edge, our suggestion is to clean the frame sealing seat before installation, confirm that there are no scratches on the pushing path, and then arrange transportation and placement. Aili Industry can provide selection packages for box-type, flat-plate and V-type chemical filtration products. For box-type MAU packages, please refer toMAU box type chemical filter , product series can be viewedChemical filter product range . Device-side applications can useChemical filter FFU form, integrated chemical adsorption layer withHEPA/ULPA filter particle filtration, the structure of chemical first and then particle can check the sealing interface separately during installation. The manufacturing end covers motors, fans, control systems, sheet metal and complete machine assembly. The filter element sealing structure and frame interface can be checked together during the matching stage, and the non-standard sealing seat can be adjusted according to the on-site frame. The specific gas effect, sealing performance and replacement cycle still need to be verified based on the corresponding configuration data and on-site working conditions. The actual results are subject to on-site leak detection and gas detection results.

Related questions and answers

The sealing edge is slightly rolled up. Can it still be used after being flattened?
It depends on the degree of rolling and whether the sealing line is continuous. After slight deformation and flattening, you should visually check the fit status. If there is obvious cut or detachment, it is recommended to replace it. It is not suitable to operate with injuries.

How to judge whether there is any problem with the seal after installation?
Can be combined with visual inspection, air volume verification and outlet gas detection. When the sealing is not tight, the air volume may be high but the outlet concentration will not decrease. This requires comprehensive judgment.

Can Aili Industrial provide sealing structure adaptation?
The sealing structure of the filter element can be checked based on the on-site frame size and sealing seat form, and the non-standard interface can be adjusted according to the frame conditions. Specific plans need to be confirmed based on product information and site conditions.

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