
Clean room purification equipment FAQ and selection guide
There are many types of clean room purification equipment, and different products play different roles in air filtration, clean air supply, personnel purification, material transfer, local cleaning and environmental control. Equipment selection usually requires comprehensive consideration of cleanliness level, processing air volume, air supply speed, system resistance, filtration efficiency, installation space, control method, operating time and specific process environment.
Aili Industrial FAQ and Selection Knowledge Center focuses on FFU, EFU, BFU, air filter, high-efficiency air supply outlet, fan box, air conditioning box, air shower room, transfer window, clean workbench, clean shed, weighing room, laminar flow equipment and intelligent control system to sort out common problems in the design, selection, installation, operation and maintenance of clean room purification equipment.
Users can search for relevant answers by product category, question type or application industry, or contact Aili Industrial for equipment configuration and selection communication based on project parameters.
All clean room purification equipment FAQs
Filter by product, problem type and application industry to find technical issues and selection content related to project conditions.
Aili Industry can provide selection suggestions for FFU specifications, air volume, filter level, installation quantity and group control method based on the clean room area, ceiling structure, cleanliness level, air exchange frequency, equipment resistance and control requirements.

Aili Industrial can customize the EFU dimensions, box height, air volume, wind speed, filtration efficiency, installation method and control interface according to the internal space of semiconductor equipment, SMT equipment, automation equipment and local clean units.

This section focuses on the structural differences between FFU, BFU and high-efficiency air supply outlets, as well as the selection methods in new clean rooms, partial renovation projects and centralized air supply systems.
When choosing BFU, high-efficiency air supply vents or FFU, you need to comprehensively consider whether it has a centralized air supply system, available static pressure, installation space, noise requirements, maintenance methods and post-control requirements. You cannot judge based on filter efficiency alone.

The higher the filter level, the better. The actual selection must be comprehensively determined based on the target cleanliness, detected particle size, system air volume, available static pressure, filter installation size, sealing method and operating energy consumption.


Frequently Asked Questions about Clean Workbench and Selection of Airflow Forms
The clean workbench provides a relatively independent local clean environment for the operating area through fans and air filters. According to the flow direction of clean air, common forms include horizontal flow clean benches and vertical flow clean benches.
This section mainly compares the differences between the two air flow forms in terms of structure, operating space, product protection, air flow direction and applicable scenarios, helping users choose a suitable clean workbench based on the process flow.

The fan box is used to provide the required air power for air conditioning systems, purification equipment or local air supply systems. The main parameters of the fan box include air volume, full pressure or static pressure, motor power, speed regulation method, noise, interface size and installation direction.
This section mainly explains how to determine the air volume and static pressure of the fan box, and helps users make selections based on pipeline resistance, filter resistance, air outlet resistance and system margin.。

Chemical filters are primarily used to treat specific gaseous pollutants in the air and have different working goals than HEPA or ULPA filters for particulate matter filtration. Different chemical filter materials have different processing capabilities for acidic gases, alkaline gases, organic gases and other pollutants.
This section mainly introduces the types of pollutants that chemical filters can handle, as well as the pollutant composition, concentration, temperature and humidity, target removal requirements and replacement cycles that need to be paid attention to when selecting filter materials.

Frequently Asked Questions about FFU and Intelligent Control of Clean Equipment
The clean workbench provides a relatively independent local clean environment for the operating area through fans and air filters. According to the flow direction of clean air, common forms include horizontal flow clean benches and vertical flow clean benches.
This section mainly compares the differences between the two air flow forms in terms of structure, operating space, product protection, air flow direction and applicable scenarios, helping users choose a suitable clean workbench based on the process flow.

| FAQ classification | Classification description |
| FFU FAQ → | FFU working principle, specifications and dimensions, air volume and speed, filtration efficiency, centralized control, installation and maintenance and clean room application |
| EFU FAQ → | EFU structural height, equipment-side installation, ultra-thin design, air volume calculation, filter configuration, control method and customized selection |
| BFU FAQ → | BFU structure, air volume and static pressure, ceiling installation, filter configuration, and differences from FFU and high-efficiency air supply outlets |
| Frequently Asked Questions about Fan Box→ | DC fan chassis, AC fan chassis, air volume and static pressure, pipe connections, energy-saving transformation, noise and control methods |
| Frequently Asked Questions about Air Conditioning Box→ | Air treatment process, functional section configuration, filter section, fan section, surface cooling section, heating and humidification and project selection |
| Clean air supply system problems→ | Cooperation between MAU, FFU, DCC and other systems, as well as clean room air supply, return air and pressure difference design |
| FAQ classification | Classification description |
| Primary filter FAQ→ | Primary filter type, efficiency, dust holding capacity, resistance, installation location and replacement cycle |
| Frequently Asked Questions about Medium Efficiency Filter→ | Selection, air volume, resistance and air conditioning system application of bag type, plate type and other medium efficiency filters |
| HEPA Filter FAQ→ | H13, H14 efficiency, structural form, rated air volume, initial resistance, final resistance and leak detection method |
| ULPA Filter FAQ → | U15, U16, U17 efficiency levels, application scenarios and differences from HEPA filters |
| Frequently Asked Questions about High Temperature Resistant Filters→ | Operating temperature, material configuration, installation sealing and high temperature working conditions precautions |
| Frequently Asked Questions about Large Air Volume Filters → | Air volume, resistance, structure and air conditioning system application of V-type, box-type and other large air volume filters |
| Liquid tank seal filter FAQ → | Liquid tank sealing structure, sealing method, installation conditions, leak detection and replacement methods |
| PTFE Filter FAQ → | PTFE filter material characteristics, resistance, filtration efficiency and clean equipment applications |
| Chemical Filter FAQ→ | AMC control, target gas, filter material selection, processing air volume, installation location and replacement judgment |
| FAQ classification | Classification description |
| Frequently Asked Questions about High-Efficiency Air Supply Vent→ | High-efficiency air supply outlet structure, air volume, size, static pressure box, filter configuration and installation method |
| Liquid tank sealing high-efficiency air supply outlet FAQ → | Liquid tank sealing, DOP leak detection, filter installation and replacement, and high clean environment applications |
| Disposable high-efficiency air supply outlet FAQ → | Integrated structure, usage conditions, installation methods and overall replacement method |
| Top-intake high-efficiency air supply outlet FAQ → | Top air inlet structure, air duct connection, ceiling space and installation requirements |
| Side air inlet high-efficiency air supply outlet FAQ → | Side air inlet structure, installation space, air duct layout and applicable projects |
| Laminar flow hood FAQ→ | Vertical laminar flow, horizontal laminar flow, clean air flow coverage, wind speed and filtration configuration |
| FAQ classification | Classification description |
| Frequently Asked Questions about Air Shower→ | Dimensions, wind speed, nozzles, interlocking and installation of single, multi-person, pass-through and corner air showers |
| Frequently Asked Questions about Cargo Shower→ | Cargo shower, channel size, door structure, air shower time and logistics purification process |
| Frequently Asked Questions about Delivery Window→ | Mechanical interlocking, electronic interlocking, static, dynamic, self-cleaning transfer windows and installation methods |
| Clean Wardrobe FAQ→ | Clean laundry storage, air supply filtration, UV function and clean area configuration |
| Frequently Asked Questions about Clean Shoe Cabinets→ | Clean shoe storage, ventilation filtration and changing area configuration |
| Frequently Asked Questions about Material Purification→ | Cleaning, blowing, transferring and contamination control before materials enter the clean area |
| FAQ classification | Classification description |
| Clean bench FAQ → | Structure, wind speed, filters and applications of single, double, horizontal flow and vertical flow workbenches |
| Clean shed FAQ → | Clean shed area, cleanliness, number of FFU, enclosure structure, installation and expansion methods |
| Weighing Room FAQ → | Negative pressure control, air flow organization, filtration system, pressure difference and weighing operating environment |
| Sampling room FAQ → | Sampling area cleanliness control, air flow mode, filtration configuration and installation conditions |
| Laminar Flow Workspace FAQ→ | Local clean airflow, coverage, wind speed uniformity and process equipment support |
| Safety cabinet FAQ→ | Safety cabinet type, air flow protection, filtration configuration and applicable operating range |
| FAQ classification | Classification description |
| Frequently asked questions about FFU group control system → | Single machine control, partition control, centralized monitoring, work and duty modes, communication and address settings |
| FFU touch screen controller FAQ → | Type 86 controller, device quantity, zone settings, wind speed adjustment, start and stop and status viewing |
| Computer group control system FAQ → | Multi-partition management, single machine control, parameter setting, operation plan and equipment status monitoring |
| Frequently Asked Questions about EC/DC Fans→ | Differences between EC, DC and AC fans, speed adjustment methods, input power, noise and working condition matching |
| Fan motor FAQ→ | Motor type, power, speed, temperature rise, control method and fan matching |
| RS485 communication FAQ → | Communication cabling, device address, distance, interface, troubleshooting and group control connection |
| FAQ classification | Classification description |
| Frequently asked questions about FFU group control system → | Single machine control, partition control, centralized monitoring, work and duty modes, communication and address settings |
| FFU touch screen controller FAQ → | Type 86 controller, device quantity, zone settings, wind speed adjustment, start and stop and status viewing |
| Computer group control system FAQ → | Multi-partition management, single machine control, parameter setting, operation plan and equipment status monitoring |
| Frequently Asked Questions about EC/DC Fans→ | Differences, speed regulation methods, input power, noise and working condition matching between EC, DC and AC fans |
| Fan motor FAQ→ | Motor type, power, speed, temperature rise, control method and fan matching |
| RS485 communication FAQ → | Communication cabling, device address, distance, interface, troubleshooting and group control connection |
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