How to install HEPA high efficiency filter?

Installation is simple: install it, tighten it, and check for leaks. But the problems at the scene often lie in the details of these actions.

The quality of the installation depends not only on the operation itself, but also on the construction sequence and the condition of the site. Unpacking the filter element before cleaning the air duct and box, and continuing to polish and weld after installation. These arrangement problems are more likely to leave hidden dangers than operating techniques.

Check the product and environment before installing

Before unpacking, confirm what needs to be confirmed.

Product verification : Compare the model, size, efficiency level and serial number to confirm that the one arriving is the one to be installed. Check whether the packaging, outer frame, filter material and sealing surface are damaged. If there are any abnormalities, isolate the record first, and do not bring the problem to the computer.

Environmental confirmation : Whether the air duct and box are clean. If there will be subsequent dust-generating construction such as grinding and welding, it is recommended to postpone the installation of the filter element, or to protect it and evaluate whether re-inspection is needed. After the filter element is unpacked, it becomes the most easily contaminated part of the entire system.

For matching the FFU fan filter unit must also be cleaned and confirmed inside the unit; equipment-side applications such as The filter element used in The internal structure of the EFU equipment-side fan filter unit is complex and requires more careful cleaning and inspection before installation.

Protect filter media during handling and assembly

During transportation, the force should be applied at a position that allows support, and do not press the filter paper directly.

Confirm the positions of airflow arrows, hold-down parts and gaskets according to the drawing. The direction of air flow is the most likely to make mistakes during installation , especially inside the equipment or where the air path has a turning point. Just looking at the arrow may not be enough. You must confirm along the actual air flow path. For specific methods, please refer to the relevant instructions for confirming the installation direction on the device side.

Tighten gradually during assembly to avoid deformation of the frame due to stress on one corner first. Pay attention to the insertion angle and pressing sequence of the liquid tank sealing structure. For details, please refer to the relevant instructions on knife edge size verification. involving Different grades of HEPA/ULPA air filter products may have different assembly requirements. Please follow the corresponding product information.

Complete acceptance after operation

After starting the system and reaching stable working conditions, check the air volume, pressure difference and on-site leak detection results of a single unit.

Air volume measurement : Confirm that the actual air supply volume is within the design range. Systems with multiple terminals connected in parallel must be measured one by one.

Pressure difference record : record the initial pressure difference as a baseline for subsequent operation comparison.

On-site leak detection : Scan the filter material surface and surrounding interfaces according to the project plan, and mark the location of the leak point.

Correlate the filter number with the installation location and inspection records, and this set of baseline information can be used for subsequent replacements.

Proper order of installation work

It is recommended to arrange these steps as a continuous process:

Air duct and box cleaning → Filter element arrival inspection → On-site assembly → Stable operation → Air volume measurement → On-site leak detection → Data archiving

If the order is reversed, such as installing the filter element first and then cleaning the box, or not performing operational verification after installation, the problem may not be exposed until after operation. When the installation is complete but there is still grinding or welding work, protection and re-inspection arrangements should be evaluated and do not assume that the filter element will not be affected.

About Aili Industrial’s installation packages

Aili Industry can provide installation interface data that matches the filter structure. filter with FFU fan filter unit、The EFU equipment-end fan filter unit is matched in the same manufacturing system, and the interface size and sealing structure can be uniformly checked during the planning stage.

Check the product identification and sealing requirements before on-site installation, and verify the air volume and leakage points according to the project plan after installation. Specific installation requirements are subject to product descriptions and project technical documents.