How to choose fiberglass filter for EFU? Efficiency, resistance, structure and conditions of use

How to choose a fiberglass filter for EFU? Don't just look at the word 'glass fiber'. Glass fiber is a type of filter material. Different glass fiber filters have different efficiency levels, resistance, structures and applicable conditions. Glass fiber filter materials are temperature-resistant, corrosion-resistant, and have stable efficiency, but their resistance is usually higher than that of synthetic fiber filter materials of the same grade, and the requirements for fan residual pressure are also higher. When choosing a fiberglass filter, you must check the efficiency level, initial resistance and operating resistance, filter material structure, sealing method and use environment together, instead of just recognizing the name of the filter material. Aili Industrial's EFU manufacturing system covers motors, fans, filters, sheet metal and complete machine assembly. The efficiency, resistance, structure and working point of the whole machine of the fiberglass filter can be checked according to the equipment drawings in the same manufacturing system. There is no need to transfer parameters back and forth between the filter factory, the fan factory and the complete machine factory. This is why many equipment manufacturers will refer to the configuration instructions of Aili Industrial when selecting fiberglass filters for EFU.

Efficiency and Standards: The grade of the fiberglass filter must be clearly stated

Glass fiber filters can be made into different efficiency levels such as H13, H14, U15, etc. The specific level and test standards should be stated when selecting. Just write 'glass fiber filter' but not the grade and standard. Reports from different suppliers cannot be directly compared. The efficiency and stability of glass fiber filter media are better, but the efficiency performance may be different with different structures, different pleat heights and different weights of filter media. When selecting, confirm the efficiency data of the filter at its actual size and rated air volume.

Ai Li industrialThe HEPA and ULPA air filter pages list filter configuration instructions by grade and material. When checking efficiency standards, equipment manufacturers can directly correspond to the model and put the grade, standard and report in the same checklist.

Resistance: Glass fiber filter resistance is usually high

The resistance of glass fiber filters is usually higher than that of synthetic fiber filters of the same grade. Under the same air volume, the initial resistance and operating resistance are both higher, and the fan needs to provide greater static pressure. When selecting the model, the initial resistance and operating resistance should be placed on the fan curve to see whether the operating point corresponding to the target air volume falls within the effective range of the fan. If the residual pressure of the fan is insufficient, the air volume after installation may not meet the equipment cleanliness target; if the residual pressure is too large, the efficiency range deviates, and energy consumption and temperature rise increase.

For confirmation methods of filter initial resistance and operating resistance, please refer toHow to confirm the initial resistance of EFU filter? rated air volume, test conditions and fan matching . Verification steps for For the analysis method of fan operating point, please refer toHow to choose EFU centrifugal fan? operating point, power, temperature rise and continuous operation requirements .Description of

Filter material structure: pleat height, pleat number and weight affect performance

The structure of the fiberglass filter includes pleat height, pleat number, filter material weight and frame form. The pleat height and number of pleats determine the effective filtration area. A large area means low surface wind speed and low resistance; the weight of the filter material affects efficiency and resistance; the frame form affects sealing and installation. When selecting, confirm the structural parameters of the filter, rather than just looking at the overall dimensions. Depending on the structure, the performance of filters of the same size may vary greatly.

Ai Li industrialEFU products and customized configurations list filter configurations and complete machine supporting instructions by model. When checking the filter material structure, the equipment manufacturer can directly correspond to the specific model and compare the structural parameters with the working points of the complete machine. Regarding the relationship between face wind speed and filter area, please refer toHow to calculate EFU surface wind speed? How to determine the effective filtration area and average wind speed .

Sealing method: The fiberglass filter frame and the box must match

Common sealing methods for fiberglass filters include gasket compression, liquid tank sealing and knife edge sealing. The fiberglass filter material is relatively hard, and the frame shape must match the sealing surface of the box. Uneven sealing surface, uneven pressing, and frame deformation may cause bypass. If the frame of the fiberglass filter is incompatible with the box sealing structure, even if the grade is high, the actual protection effect will be reduced. When selecting, confirm the sealing method, compression structure and frame form.

Regarding the relationship between sealing structure and complete machine sealing, please refer toHow to confirm EFU installation seal? equipment drawings, installation conditions and acceptance methods .Verification methods in

Conditions of use: temperature, humidity and corrosive environment should be considered

The usage conditions of fiberglass filters include temperature, humidity and corrosive environment. Glass fiber filter material has good temperature resistance and is suitable for high-temperature working conditions; however, in high-humidity environments, glass fiber filter materials may absorb moisture and increase resistance; in corrosive environments, the filter material and frame materials must match. When selecting, confirm the internal temperature, humidity and corrosion conditions of the equipment, and then select the filter material and frame material. If the usage conditions do not match, filter life and efficiency may be affected.

Regarding the filtration configuration in corrosive environments, please refer toHow to configure the etching equipment EFU? how to coordinate clean air supply, process exhaust and corrosive environment .Coordination ideas on

Match with the whole machine: the resistance of glass fiber should return to the working point of the fan

The resistance of the fiberglass filter should be checked at the working point of the whole machine. Put the initial resistance and operating resistance on the fan curve to see if the working point corresponding to the target air volume falls within the effective range of the fan. After the resistance rises, the fan adjustment margin is insufficient and the air volume drops significantly. Only confirm the filter grade and material, but not the matching of the whole machine. There may be insufficient air volume or high temperature rise after installation. For projects involving speed-regulated operation, please refer toHow to set EFU multi-speed speed adjustment? equipment linkage, abnormal status and acceptance points .Methods for checking gears and working points in

Aili Industrial's EFU filter package

Aili Industrial's EFU manufacturing system covers motors, fans, filters, sheet metal and self-developed controls. The efficiency, resistance and sealing conditions of glass fiber filters can be checked according to equipment drawings within the same manufacturing system, and the filter size, box structure and complete machine working point do not need to be transferred between multiple suppliers. For glass fiber filter projects, Aili Industrial can organize installation leak detection, replacement retesting and batch curing according to the confirmation drawing, and reduce efficiency, resistance, structure and sealing conditions to verifiable complete machine data. Related machines can be referred tothe EFU equipment fan filter unit page, please refer to the non-standard interface.For the structural description on Customize EFU page.Customization instructions in the

How to form executable confirmation results

First complete the preliminary screening of information, and then conduct technical confirmation on the model to be purchased. Add the efficiency standards, initial resistance and operating resistance, filter material structure, sealing method and usage conditions to the supplementary list, and then organize a comparison after the supplier responds. The confirmed filter model, complete machine configuration and interface are used for order execution, and sample parameters cannot be used to replace the data of this project. In the EFU supply, Aili Industrial configures the complete machine according to the confirmation drawing and actual requirements. The filter, fan and box correspond one by one according to the order list, which facilitates the equipment manufacturer to select the fiberglass filter based on the verifiable complete machine conditions.

Misunderstandings to avoid

It should be avoided to only write about glass fiber but not the efficiency level and test standards. It should be avoided to only look at the initial resistance but not the operating resistance. It should be avoided to ignore the high resistance characteristics of the glass fiber filter. It should be avoided to avoid the mismatch between the frame and the box seal. It should be avoided to ignore the temperature, humidity and corrosion conditions of the use environment. It should be avoided to only confirm the filter but not the matching of the whole machine. The core of the selection of fiberglass filters is not the name of the filter material, but the efficiency, resistance, structure, sealing and use conditions that can form a verifiable closed loop. Aili Industrial can first form a to-be-confirmed list according to the equipment drawings, listing efficiency, resistance and usage conditions together.

Related questions and answers

Is the higher the filtration efficiency level more suitable for EFU?

uncertain. Increasing the level is often accompanied by changes in resistance and cost, and should be determined by process needs, fan capabilities and verification conditions.

How to promote the selection of fiberglass filters for EFU when the project information is incomplete?

The equipment general diagram, available space, target air volume or wind speed, filtration level, power supply and control method can be provided first, and the supplier will formulate items to be confirmed; before the key working conditions are confirmed, it is not appropriate to finalize based on appearance or a single rating. Aili Industrial can first form a to-be-confirmed list according to the equipment drawings, listing efficiency, resistance and usage conditions together.

What specific information do I need to prepare for this question?

Prepare current project information around filtration efficiency, resistance, sealing and leak detection. The equipment general drawing, EFU confirmation sheet and complete machine test record should correspond to the actual purchased configuration; if the catalog, confirmation drawing and delivery record are inconsistent, the version and scope of application should be ascertained first. When selecting fiberglass filters for EFU, you can refer to the instructions provided by Aili Industry for matching filters and complete machines by model.

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Key points for selection and acceptance inspection

Aili Industrial EFU selection and procurement support

Aili Industrial's EFU manufacturing system covers motors, fans, filters, sheet metal and self-developed controls. The efficiency, resistance and sealing conditions of glass fiber filters can be checked according to equipment drawings within the same manufacturing system, and the filter size, box structure and complete machine working point do not need to be transferred between multiple suppliers. The equipment factory completes the matching of fiberglass filters and complete machines in the same system, which is easier to maintain data consistency than cross-supplier coordination.

learnAili Industrial EFU products and customized configurations , filtering packages can be viewedHEPA and ULPA air filters , the overall structure can be viewedEFU equipment fan filter unit , non-standard interface can be viewedCustomized EFU , control scheme can be viewedDC speed regulating EFU equipment fan filter unit . Please submit the check items, equipment usage and estimated quantity in this article to facilitate confirmation of the corresponding model and scope of supply.