What equipment-side applications are low dust filter materials suitable for?

Low dust chemical media are suitable for equipment-side applications where particle release from the filtration section is a concern, but should be evaluated in conjunction with specific particle targets, airflow and subsequent filtration. Low dust does not mean no particulate filtration is required, nor is it a substitute for gas suitability checks. When selecting equipment, the powder drop characteristic is only one of the conditions.

Why is the equipment side more concerned about the dust falling off from the filter material?

The equipment end space is usually more compact, the filter material is often immediately downstream of the wafer, optical components, or precision mechanisms, and the tolerance for particle release is lower than that of a general room circulation. There are air supply ducts and end filters behind the room-level filter section as buffers, while the equipment-side chemical filter section may be located directly upstream of the protected object, with no additional particle filtration opportunities in between. In this case, the tendency of the medium itself to lose powder, the positioning effect of the protective net, and the sealing state of the frame will directly affect the downstream particle count. The value of low dust filter material is first reflected in this position.

Which device-side scenarios deserve priority evaluation?

To determine whether low-dust filter material is needed, the key is to see whether there is particle protection after the filter section, and the sensitivity of the protected object to particles. Common scenarios include: near the air inlet of lithography equipment, EFEM internal circulation, wafer temporary storage cabinets, mask storage equipment, and local air supply sections of inspection or measurement equipment. What these locations have in common is that the distance between the gas filter section and the sensitive surface is short, the air flow organization is relatively closed, and the particles are not easily diluted once released. Regarding what field data is required for the air inlet at the equipment end, please refer toWhat field data is needed for chemical filtration of the air inlet of lithography equipment? . Conversely, if the chemical filter section is located in the air conditioning box and there is an H13 or higher grade particle filter downstream, the priority of low dust can be appropriately lowered.

Low dust does not mean that particle filtration can be dispensed with

Low dust describes the media's tendency to release, not its particle filtration efficiency. It cannot replace the interception effect of HEPA or ULPA on aerosol particles, nor does it mean that the entire filter section meets a certain cleanliness level. A common approach on the equipment side is to combine a chemical filter section with a particle filter section. The chemical section is responsible for the target gas, and the particle section is responsible for downstream cleanliness. The acceptance methods and criteria for the two are different. If the terminal particle filtration is canceled because of the selection of low-dust filter media, the risk is that the gas treatment reaches the standard but the particle count does not meet the requirements. For issues involving the division of labor between particles and gas filtration, please refer toWill chemical filter materials bring particle pollution downstream?。

The combined structure affects the actual powder loss more than the medium itself

The actual downstream particle behavior may be different after the same low-dust media is installed in different frames and sealing structures. Whether the media is firmly positioned, whether the protective screen fits well, whether there are burrs on the frame, and whether there is any squeeze damage during transportation and installation will all change the result of powder loss. The size of the filter element at the equipment end is usually smaller, and the pleat density and gasket compression are more sensitive to air flow distribution. When the installation is not in place, the local wind speed is high, which may also aggravate media wear. Therefore, when evaluating low-dust filter media, you should look at the structure and installation instructions of the entire product, rather than just looking at the powder loss data of the media sample.

Aili industrial supporting equipment

Regarding equipment-side chemical filtration, we are more exposed to the two types of needs: FFU matching and compact filter elements. When selecting low-dust media, it is usually necessary to confirm the frame structure, protective net form, and downstream particle requirements. It is easy to miss the impact of the installation link by looking at the media parameters alone. Aili Industry can provide media configuration options for FFU matching, box-type, flat-type and V-shaped products. The compact structure of the equipment can be adapted non-standardly according to space and air volume. If it involves replacing the imported filter element in the original system, it can also be checked according to the interface size and media requirements. The manufacturing end covers motors, fans, control systems, sheet metal and complete machine assembly. The interfaces between the filter section and the air supply structure can be aligned in the same package. Products can be viewedChemical filter product series page to learn about media types, FFU integrated configuration can be referred toChemical filter FFU page, air supply power package can be referred toFFU fan filter unit page. The specific gas effect, particle performance and replacement cycle still need to be verified based on the corresponding configuration data and on-site working conditions. Actual results are subject to on-site leak detection and particle test results.

Related questions and answers

Does the low dust filter material no longer need to be equipped with HEPA?
no. Low dust describes the tendency of the medium to release itself and cannot replace the interception efficiency of the particle filter. Whether terminal particle filtration is required at the equipment end should be confirmed separately according to the cleanliness level requirements.

How to judge whether low dust filter material is needed at the equipment end?
First check whether there is particle protection downstream of the filter section, whether the protected object is sensitive to particles, and whether the air flow is closed. When all three conditions are severe, low-dust media and structural sealing deserve priority evaluation.

Can Aili Industrial provide low dust filter material matching according to the equipment space?
The medium and structural form can be checked based on the internal dimensions of the equipment, air volume and downstream particle requirements, and compact spaces can be adapted in non-standard ways. The specific configuration needs to be confirmed based on the corresponding product information and on-site conditions.

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Key points for selection and acceptance inspection