ULPA ultra high efficiency filter

ULPA (Ultra Low Penetration Air) filter is a type of ultra-high-efficiency filter used in high-clean air treatment systems. It mainly filters fine particles in the air through high-efficiency filter materials and reasonable folding structures.

Compared with ordinary air filters, ULPA filters are usually used in clean environments with higher requirements for particle control. U15, U16, and U17 belong to the ULPA grade range, and their efficiency evaluation is usually related to filter testing and grading systems such as EN 1822 and ISO 29463. The specific grade should be confirmed based on actual test methods and test reports.

Aili Industrial ULPA filters can be configured with different filtration levels, sizes, frames and sealing structures according to the actual installation space and system requirements, so that the filters can be matched with equipment such as FFU, HEPA BOX, clean sheds, and clean room air supply systems.

Structural composition of Aili Industrial ULPA ultra-high efficiency air filter

ULPA filters usually consist of filter materials, frames, folding structures, sealing materials and protective nets. Different projects can choose the corresponding configuration according to the installation structure and clean environment requirements.

This series can use glass fiber or PTFE low-resistance filter material, the aluminum profile frame has been surface oxidized, and can choose EPDM gasket, liquid tank or overall PU seal according to the installation method.

How to choose ULPA filter level

The common U15, U16, and U17 grades of ULPA filters are evaluated based on MPPS (most penetrating particle size) related test results under the EN 1822/ISO 29463 system. Therefore, the efficiency value at a fixed particle size cannot simply be used to replace the filter grade.

Refer to ISO 29463 related classification information:

Aili Industrial ULPA filters can be selected in U15, U16, U17 and other grades based on the project cleanliness level, system air volume, equipment resistance and installation space.

Product features of Aili Industrial ULPA ultra-high efficiency filter

High-level filtering configuration → U15, U16, U17 optional

Select the corresponding filtration level according to the requirements of the clean environment, and determine the filter material and structure based on the actual system parameters.

Closely pleated filter material structure→increases effective filtration area

By folding the filter material, a larger effective filtration area is formed in a limited installation space, which is suitable for applications with limited internal space in clean rooms and equipment.

A variety of sealing structures → adapted to different installation methods

Gasket seal, liquid tank seal and knife edge seal structure can be configured to match different filter installation frames.

Aluminum profile frame → suitable for installation of clean equipment

The existing product information on the page uses aluminum profile frames and undergoes surface oxidation treatment. Other frame materials can also be confirmed according to project requirements.

Glass fiber and PTFE filter media→Select according to working conditions

For regular projects, glass fiber filter materials can be selected based on filtration level, air volume and resistance requirements; for projects with special requirements for materials and resistance, the PTFE filter material solution can be further confirmed.

Filter size can be customized → match different equipment

In addition to common sizes, non-standard designs can be made based on FFU, HEPA BOX, clean room ceilings and internal installation dimensions of equipment.

What is the difference between ULPA filter and HEPA filter

HEPA and ULPA are both high-efficiency air filters, but their corresponding filtration levels and application requirements are different.

Simple understanding:

HEPA → Focus on meeting higher levels of particle filtration requirements

ULPA → For higher level particle control needs

In the relevant classification system of EN 1822/ISO 29463, H13 and H14 belong to the HEPA range, and U15, U16 and U17 belong to the ULPA range. The grade evaluation of the two involves MPPS testing and is not simply a horizontal comparison based on '0.3μm filtration efficiency'.

Therefore, the choice of HEPA or ULPA should be comprehensively judged based on the cleanliness level, process requirements, equipment structure, air volume and filter resistance.

Common applications of Aili Industrial ULPA ultra-high efficiency air filter

ULPA filters are mainly used in environments that have high requirements for the control of fine particles in the air. Semiconductors, electronics, medicine, biological laboratories, optics and clean rooms are all common application directions.

Application of ULPA filter in FFU system

ULPA filter can be used as the terminal filter component of FFU and form a clean air supply unit with the fan, box and control system.

In this application, the filter is not selected separately, but needs to match the fan performance, rated air volume, static pressure, filter resistance and installation size of the FFU.

FFU fan → ULPA filter → clean air is sent into the work area

For semiconductors, precision electronics and other high-cleanliness scenarios, the filter size and filtration level can be determined based on the equipment structure, and the corresponding FFU configuration can be selected based on the actual air volume.

Aili Industry itself has the production and R&D capabilities of fans, filters, FFU and control systems. When making clean air supply equipment, it can match the system from filters, fans to control parts. This is also an important basic condition when customizing products.

Application of ULPA filter in HEPA BOX

ULPA filters can also be installed in HEPA BOX or other high-efficiency air supply devices.

Common structures are:

Air conditioning system → Air duct → HEPA BOX/ULPA BOX → ULPA filter → Clean room

For the liquid tank seal and knife edge seal structure, it is necessary to confirm the filter installation frame size and sealing structure in advance to avoid installation mismatch between the filter and the box.

Therefore, when purchasing ULPA filters, in addition to providing length, width, and height dimensions, it is also recommended to confirm at the same time:

Filtration level → Rated air volume → Initial resistance → Frame structure → Sealing method → ​​Installation direction

Aili Industrial ULPA filter specifications

Specific product parameters can be adjusted according to filtration level, size and installation structure. Actual usage conditions should be confirmed with the specific model.

Aili Industrial ULPA ultra-high efficiency filter common size reference

Changes in filtration grade, filter material, size and air volume will affect the initial resistance, so the actual project should be subject to the final confirmed technical parameters.

If you choose U15/U16/U17 for a ULPA project, the official technical parameters and testing data corresponding to the ULPA level should be used as the final basis.

Tank seal ULPA filter

Liquid tank seal is suitable for clean air supply equipment that requires high sealing reliability.

When selecting, please confirm:

Liquid tank size → Liquid tank position → Knife edge size → Filter height → Installation direction

Aili Industry can confirm the filter size and sealing form based on the filter box structure, reducing repeated modifications during the equipment design stage.

How to select ULPA filter

The higher the filtration level of the ULPA filter, the more suitable it is for all systems. When choosing, you need to comprehensively consider the cleanliness level, process requirements, air volume, initial resistance, installation space and subsequent maintenance methods.

It is recommended to determine in the following order:

Cleanliness requirements → Determine U15/U16/U17 → Determine rated air volume → Determine filter size → Determine frame → Determine sealing method → ​​Confirm resistance → Confirm testing requirements

If used for FFU, further verification is required:

FFU model→Fan static pressure→Filter resistance→Design air volume→Face air velocity→Control method

If used for HEPA BOX, it is important to confirm:

Box size → Installation frame → Liquid tank/knife edge structure → Filter size → Sealing method

Aili Industrial ULPA ultra-high efficiency filter customization service

The installation spaces of different clean rooms and equipment are not completely consistent, so ULPA filters usually need to be customized according to the equipment structure.

Aili Industrial can confirm the following content based on project requirements:

For non-standard filters, it is recommended to directly provide the equipment installation diagram, original filter size or installation frame size at the early stage of the project to facilitate confirmation of the product plan based on the actual structure.

ULPA filter installation and maintenance

When installing the ULPA filter, the filter material should be protected from collision, extrusion, or scratches by sharp objects.

It is recommended to check before installation:

Filter appearance→ Frame size→ Gasket status→ Installation frame→ Sealing structure

During installation, ensure a good fit between the filter and the mounting frame.

During use, you can judge whether replacement is needed based on clean room particle monitoring, system air volume, filter resistance, and equipment operating status. It is not recommended to judge only based on a fixed time period.

When the filter resistance changes significantly or the clean environment indicators are abnormal, the filter, sealing structure and upstream air treatment system should be checked based on the on-site inspection results.

ULPA filter FAQ

What is a ULPA filter?

ULPA is the abbreviation of Ultra Low Penetration Air, used to represent ultra-high efficiency air filter. U15, U16, and U17 are common ULPA filter levels.

What is the difference between ULPA filter and HEPA filter?

HEPA usually corresponds to H13, H14 and other levels, and ULPA usually corresponds to U15, U16, U17 and other higher filtration levels. The specific grade should be judged according to the test methods and test results of the corresponding standards.

What is the difference between U15, U16 and U17?

The three belong to different ULPA filtration levels. The main difference lies in the filtration efficiency and allowable penetration rate under MPPS conditions specified in the standard. The specific value should be confirmed in conjunction with the adopted standard version and test report.

Can ULPA filters be used in semiconductor clean rooms?

Can. ULPA filters are often used in clean environments such as semiconductors and precision electronics that have high requirements for air particle control.

Can ULPA filters be installed on FFU?

Can. The ULPA filter can be used as the terminal filter component of FFU, but it needs to be matched according to the FFU fan static pressure, design air volume and filter resistance.

Can ULPA filters be installed inside HEPA BOX?

Can. It is necessary to confirm the installation dimensions, frame structure, sealing method and filter height of the HEPA BOX in advance.

What sealing methods do ULPA filters have?

Commonly used ones include EPDM gasket seals, liquid tank seals, knife edge seals and overall PU seals. The specific form should be determined according to the installation frame.

Can ULPA filters be made in non-standard sizes?

Can. Product information supports customization of size, filtration level, frame and sealing method.

Can ULPA filters use PTFE filter material?

Can. Aili Industrial's current product information provides glass fiber filter material and PTFE low-resistance filter material configurations. The specific requirements need to be confirmed according to the project requirements.

What material is the ULPA filter frame generally made of?

Current products are available with aluminum profile frames and corresponding surface treatments; special projects can also confirm other frame materials based on installation and environmental requirements.

What is the service life of ULPA filters?

There is no uniform fixed replacement cycle. The actual life is related to the inlet air quality, dust load, operating air volume, filter resistance and clean room operating conditions.

When do ULPA filters need to be replaced?

It can be comprehensively judged based on filter resistance, clean room particle monitoring results, system air volume and equipment operating status. For critical clean environments, on-site maintenance standards should be implemented.

What is the resistance of ULPA filter?

The resistance is related to the filtration grade, filter material, size, face velocity and filtration area. Filters of the same size will have different resistances at different levels and air volumes, so the test data of the specific model should prevail.

Can ULPA filters be used in high humidity environments?

It needs to be confirmed based on the filter material, frame, sealing material and actual humidity conditions. For high humidity or special process environments, it is recommended to clarify the environmental parameters during the selection stage.

Can ULPA filters be used on clean benches?

It can be configured according to the design requirements of the clean workbench. The filtration level needs to be selected based on the air volume, installation size and cleanliness level.

Can ULPA filters be used in biological laboratories?

It can be applied to some laboratory air treatment systems that require high-level particle control. The specific filtration level should be determined based on laboratory functions and design specifications.

Do ULPA filters need to be tested?

For key applications such as semiconductors, precision electronics, and medicine, it is recommended to conduct related tests such as efficiency, resistance, and leakage according to project requirements, and use the test results as the basis for acceptance.

Can ULPA filters provide test reports?

Corresponding testing documents, product parameters and testing items can be confirmed according to specific product and project requirements.

How are ULPA filters sized?

It needs to be determined based on the installation frame. It is recommended to provide equipment drawings, original filter size or installation opening size, and also confirm the filter thickness, sealing form and installation direction.

What parameters need to be provided when purchasing ULPA filters?

It is recommended to provide information such as filtration level, length, width and height dimensions, design air volume, installation method, sealing form, filter material requirements, frame material and usage environment.

ULPA ultra-high efficiency filter selection consultation

If you are selecting ULPA filters for semiconductor, electronics, display panels, optics, pharmaceutical or clean room projects, you can make your selection based on the following information:

Filter level → U15/U16/U17

Dimensions → length×width×height

Air volume → m³/h

Installation method → ​​Gasket/liquid tank/knife edge

Filter material→ Glass fiber/PTFE

Frame → Aluminum profile/other materials

Usage environment → temperature/humidity/cleanliness level

Aili Industrial can assist in confirming the size, filtration grade, sealing structure and supporting solutions of the ULPA filter based on the actual equipment size and air treatment requirements.