transfer window

Transfer windows are used for material transfer between clean areas and adjacent areas, or between different controlled areas.

Operators can put in and take out items in their respective areas, reducing the need to repeatedly open personnel access doors due to handling materials.

Different projects have different requirements for transfer windows: manual transfer of small items requires attention to the inner cavity and interlocking; when cavity air purification is required, circulating filtration should be considered; when material surface purging is required, air shower should be evaluated; large items, carts, and automated logistics also need to check the load capacity, passage space, and equipment interfaces.

Aili Industrial can combine materials, installation and operation processes to provide transfer window product selection, functional configuration and non-standard customization support.

Stainless-Steel-Pass-Box_AILIGY
Transfer window product series
Product seriesProduct introduction
Mechanical interlocking transfer window→The mechanical mechanism restricts the opening sequence of the doors on both sides, which is suitable for manual transfer of small pieces with a relatively simple process. Regular static structures do not configure a loop filtering system by default.
Electronic interlocking transfer window→Through door status detection and electrical lock control, door opening authority is managed, and status prompts, delayed release and purification program linkage can be added as needed.
Stainless steel transfer window→According to the cleaning environment, confirm the materials of the inner tank, outer box, door frame and bottom plate, and can combine mechanical interlocking, electronic interlocking, self-cleaning or air shower functions.
Self-cleaning transfer window→Also known as the dynamic transfer window, it controls air particles in the cavity through fans, filters and air return and return structures. It is suitable for workstations that require purification process management.
Air shower transfer window→Blow the outer surface of the material through the nozzle airflow, and combine with return air filtration to process the return air. It is suitable for materials that allow airflow to be purged.
Floor-to-ceiling transfer window→For large materials, turnover equipment and cart transfers designed according to the project, focus on confirming effective openings, load-bearing and ground interfaces.
Double door transfer window→Double doors are used on the same operating side, which is suitable for wider pallets and packaging boxes. The center seam seal, door opening space and door group interlocking need to be checked together.
Corner transfer window→Arrange the access openings in adjacent directions, suitable for corners and turning stations. The inner cavity needs to be determined according to the material rotation trajectory.
Automatic lifting door transfer window→It adopts a vertical lifting door body, which can be configured with buttons, sensors or production line linkage as required, and can be matched with conveying equipment.
Roller conveyor transfer window→Combining the transfer chamber with roller conveying, it is suitable for boxes, pallets and turnover equipment whose bottom surface can stably span the distance between rollers.
Automatic roller conveyor air shower transfer window→Integrate the power drum, detection, door control and blowing system, and coordinate with the production line according to the feeding, positioning, closing, blowing and discharging processes.
Non-standard customized delivery window→The design is carried out around special dimensions, door positions, materials, load-bearing, purification and control interfaces, and is suitable for engineering transformation and equipment matching.

How to choose the right delivery window


Determine the materials and loading methods first

Provide the maximum and minimum material size, weight, packaging status and typical placement methods, and clarify whether manual pick-and-place, pallet, cart or automatic transportation is used.
The effective inner cavity needs to accommodate materials and operating actions, and the available space cannot be directly determined by the overall dimensions of the equipment.


Redefine pollution control needs

Main needsEvaluable configurationsConditions that need to be confirmed
Basic material handoverStatic interlock transfer windowMaterial pre-processing, door opening sequence and area management
Cavity air particle controlself-cleaning transfer windowFiltration configuration, air supply and return, loading and verification conditions
Air flow purges the outer surface of the materialAir shower transfer windowPackaging strength, shielding, static electricity and blow-out suitability
Automated logistics handoverAutomatic door and conveyor configurationElevation, positioning, rhythm and upstream and downstream interfaces
Air filtration, surface purging, disinfection and sterilization have different treatment objectives. It should be selected according to the actual process and cannot be judged to have all the functions based on the product name alone.


Select interlocks according to operating procedures

Mechanical interlocking can be evaluated for basic manual transmission; electronic interlocking can be evaluated when status prompts, delayed releases, purification or equipment linkage are required.
Interlocking mainly manages the door opening sequence, and door sealing, box joints and wall connections still need to be confirmed separately.


Determine the structure based on the site

Check the wall openings, wall thickness, ground elevation, door opening space on both sides and equipment moving routes. For special door positions, large items or cart projects, the steering, wheel pressure, threshold and support conditions should also be confirmed.


Arrange maintenance space in advance

When equipped with self-cleaning, air shower or automatic conveying functions, spaces for inspection and disassembly of filters, fans, door drives, rollers and control components should be reserved.


How materials, door types and functions can be combined

The classification of transfer windows comes from different dimensions, and the same device can have multiple characteristics at the same time.

Configuration dimensionsCommon choicesSelection concerns
Cabinet materialStainless steel, exterior spray-coated steel plate with stainless steel linerMaterial grade, usage range and cleaning agent compatibility
Gating methodMechanical interlocking, electronic interlockingOperation process, power supply and exception handling
Purification functionStatic, self-purifying, air showerProcessing objectives, material suitability and verification
Door layoutPass-through, double door, corner, lift doorEffective opening, action space and sealing
Installation structureThrough-the-wall, floor-standing and other customized structuresWall-to-ground interface, support and maintenance
Delivery methodManual, cart, roller, beltMaterial bottom surface, load and conveying rhythm
For example, the stainless steel structure can be equipped with electronic interlocking and self-cleaning functions; the floor-standing structure can also be combined with an air shower. However, the floor-standing type does not necessarily allow the passage of carts, and the automatic lift door does not necessarily include a conveyor system. Each configuration should be confirmed separately.

Aili Industrial's supporting manufacturing capabilities

Aili Industrial has the manufacturing capabilities of motors, fans, control systems, sheet metal processing, air filters and complete machine assembly. It can jointly check the box structure, door interlocking, air supply filtration and operation control according to the functions required by the project.


Structure and installation matching

Combined with the materials, openings, wall thickness and on-site space, confirm the inner cavity, door position, bottom plate load, support and edge wrapping.


Fan and filter matching

For self-cleaning and air shower projects, the configuration should be confirmed based on the filter resistance, air path and loading conditions, and not only based on the parameters of a single component.


Gate control and process matching

According to the loading, operation and retrieval steps, confirm the door status, release conditions, equipment signals and abnormal recovery methods.


Standard products and non-standard projects supporting

Regular workstations can be selected from existing series; projects with special sizes, layouts or interfaces can be further confirmed through non-standard customized transfer windows.

What information is required for transfer window selection?


Data itemsSuggested content
Use areaArea usage, environment and management requirements on both sides
Material informationMaximum and minimum dimensions, weight, packaging and base construction
Operation modeLabor, pallet, cart or conveyor line
Deliver requirementsSingle number, frequency of use and target beat
Installation conditionsOpenings, wall thickness, elevation, floor and surrounding space
Material requirementsStainless steel grades, usage range and surface treatment
Functional requirementsInterlocking, self-cleaning, air shower, automatic door and prompt functions
Device interfacePower supply, signal, communication and upstream and downstream action processes
Acceptance requirementsTest status, inspection items and judgment conditions

The synergistic advantages of the entire industry chain of Aili Industrial Transfer Window

The transfer window plays the role of 'gateway' in the flow of materials in the clean room: the doors on both sides cannot be opened at the same time, the air flow cannot be short-circuited, and the cleanliness level cannot be degraded due to the transfer action. The reliability of this product does not depend on how outstanding a certain parameter is, but on whether the interlocking mechanism, box seal, fan filter unit, and control logic can work together under the same set of manufacturing standards. Aili Industrial's full industry chain coverage just responds to this demand.

Core components and the entire machine are manufactured from the same source


Aili Industrial's manufacturing system covers motors, fans, filters, control systems, sheet metal processing, complete machine assembly and product testing. This means that the fans, filter units and interlocking control modules provided by the transfer window are in line with Aili IndustrialFFU、the air shower come from the same manufacturing system. The core components used in For air shower transfer windows or laminar flow transfer windows, the fan performance directly determines the shower effect, and the filter efficiency directly determines the cleanliness level after self-cleaning. When these components and the complete machine are produced under the same quality control framework, the matching and consistency are well documented, rather than relying on passive adaptation after patching together outsourced parts.

Check the filtering level and device parameters under the same conditions


If the transfer window is equipped with a high-efficiency filter unit, its filtration level (H13/H14 or higher), air volume, static pressure, and sealing interface need to be confirmed simultaneously with the structure of the entire machine. Aili is produced at the same timeHEPA/ULPA filters andFFU、EFU、BFU、HEPA BOX and other supporting products, the filtration scheme of the transfer window can be aligned with the upstream and downstream equipment parameters under the same project conditions. For example, the self-cleaning time of the laminar flow transfer window depends on the matching of the filter resistance and the fan curve. If the two belong to different suppliers, trial and error are often required during debugging; but in Aili's system, this matching can be verified before leaving the factory.

Unification of structural parts and assembly quality control


The flatness of the box of the transfer window, the sealing of the door, and the durability of the interlocking mechanical structure are quality issues in the sheet metal processing and assembly process. Aili has its own production capacity for sheet metal processing and complete machine assembly. The transmission window box, air shower room, and clean workbench are produced under the same manufacturing logic. The consistency of surface treatment and assembly accuracy is supported by the manufacturing system. As the most frequently moved component of the transfer window, the interlocking device's reliability directly depends on assembly tolerance control rather than the brand of a single outsourced part.

Practical implications for delivery window categories


For standard interlocking transfer windows, the collaboration of the entire industry chain is reflected in the manufacturing consistency of the box and interlocking mechanism; for air shower/laminar flow transfer windows, this further extends to the matching of fans, filters and control systems. Aili Industrial Transfer Window relies on the manufacturing coverage of the two major production bases in Suzhou and Guangde, making this category traceable in terms of delivery and after-sales response. When the transfer window needs to be confirmed with FFU, air shower or filter, it is the product and technical personnel in the same manufacturing system that are connected, rather than the coordination chain across suppliers.
Aili Industrial Motor R&D and Production(1)(1)

Fan and motor matching

For equipment such as transfer windows, FFU, EFU, and BFU, check the filter resistance, design air volume, and fan static pressure conditions together.


Related: air volume, static pressure, filter resistance

Aili Industrial Intelligent Group Control System

Control system collaboration

Equipment projects can simultaneously confirm speed regulation, operation control and communication requirements, so that filters and air supply equipment can communicate according to the same working conditions.


Related: Equipment operation and control requirements

Aili Industrial FFU production sheet metal production

Sheet metal and structural processing

The box, frame and related structural parts can be confirmed according to the installation space and equipment interface, and manufacturing support is provided for standard and non-standard sizes.


Related: Dimensions, interfaces, installation structures

Aili Industrial FFU high-efficiency filter production workshop

Filter independent production system

Covering HEPA, ULPA and other air filtration products, the grade, filter material, size, frame and sealing method can be confirmed by project.


Related: Filter production and project selection

Aili Industrial Filter Testing

Assembly and process inspection

Quality inspection covers core components, production processes and complete machine assembly, and corresponding inspections are carried out according to product type.


Associations: parts, processes, assemblies

Aili Industrial FFU strict testing

Product testing and delivery

Conduct corresponding performance and operational tests based on product type, and confirm specifications, materials, packaging and delivery arrangements based on project requirements.

Related: testing, information, packaging, delivery


The value of collaboration across the entire industry chain is not to emphasize a single component alone, but to match filters, fans, structures and control parameters in the same project based on actual system conditions. The final configuration is still subject to the technical specifications, drawings and testing data confirmed by both parties.

Project support advantages for large factories


Aili Industry has a 30,000-square-meter production base. The production area covers motors, fans, filters, control systems, sheet metal processing, complete machine assembly, product testing, and finished product management. For HEPA and ULPA filter projects, complete site and manufacturing zoning provide the organizational basis for raw material entry, filter production, structural component processing, process inspection, finished product storage and packaging delivery.


The project value of large-scale production bases is mainly reflected in multi-category collaboration, parallelization of standard and non-standard products, batch project organization, and supporting communication of filters and clean equipment.

Aili Industrial 30,000 square meters modern industrial plant
Aili Industrial FFU production sheet metal production

Sheet metal processing

Aili Industrial FFU production

Whole machine assembly

Aili Industrial FFU strict testing

Product testing

Aili Industrial FFUEFU and other purification equipment warehouse

Finished product area

Centralized coordination of multiple production links

Links such as filters, sheet metal, complete machine assembly and testing can be communicated around the same project conditions.

Project focus: specifications, interfaces, working conditions


Submit project request→

Multi-product supporting communication

When the project requires transfer windows, filters, FFU, EFU, BFU or other clean equipment at the same time, the relevant parameters can be checked simultaneously.

Project focus: air volume, static pressure, installation


View supporting products →


Standard and non-standard manufacturing support

Confirmation of standard specifications or non-standard dimensions, frames and sealing structures can be arranged according to product series and project conditions.

Project concerns: drawings, materials, quantities


Submit non-standard sizes →


Batch project organization

For different quantities, batch requirements and delivery nodes, production and delivery arrangements can be communicated during the order confirmation stage.

Project focus: quantity, batch, time


Communicate delivery plan →

Process inspection and finished product management

Arrange corresponding process inspection, finished product storage and pre-shipment confirmation according to product type.

Project focus: check items, labels, information

Packaging and delivery coordination

Packaging and receipt requirements can be confirmed based on product structure, quantity and transportation method.

Project focus: packaging, transportation, receiving

The scale of the production base provides site and organizational conditions for project manufacturing and does not replace the technical confirmation of specific products. Each project is still subject to confirmed models, drawings, technical specifications, testing requirements and order plans.

From parts to finished products, how is each step inspected?

Through whole-process quality control, we reduce overall machine performance fluctuations caused by differences in component performance and ensure that EFU and other purification equipment have stable operating performance and good batch consistency.

Aili Industrial Motor Testing
Core component testing
Aili Industrial FFU production delivery process (1)
Aili Industrial FFU production process inspection
Production process inspection
Aili Industrial FFU production delivery process (1)
Aili Industrial FFU complete machine inspection
Whole machine assembly inspection
Aili Industrial FFU production delivery process (1)
Aili Industrial conducted air volume, wind speed uniformity, noise and operational stability tests on FFU samples to verify whether the product performance meets the application requirements of clean rooms and industrial equipment.
Air volume test
Aili Industrial FFU and other purification equipment custom delivery process (1)
Aili Industrial FFU shipment inspection
Factory inspection
Aili Industrial Product Process (1)
Aili Industrial FFU strict testing
Whole machine operation test
Aili Industrial Product Process (1)
Aili Industrial FFU vibration detection
Vibration test
Aili Industrial Product Process (1)
Aili Industrial conducted air volume, wind speed uniformity, noise and operational stability tests on FFU samples to verify whether the product performance meets the application requirements of clean rooms and industrial equipment.
Wind speed uniformity test
When the motor, fan, control system, filter and complete machine are all controlled by its own manufacturing system, when performance deviations occur in the product, the problem can be quickly located and optimized, rather than relying on repeated coordination with multiple external suppliers.

Regarding the delivery window, you may also want to know

From product selection, performance configuration to customized development, the following are the most common issues that customers are concerned about when choosing delivery windows.

Q1: What is the difference between ordinary transfer window and self-purifying transfer window?

Ordinary static transfer windows are usually not equipped with a circulation filtration system; self-purifying transfer windows add fans, filters and air return structures to control cavity air particles.

Q2: How to choose between self-cleaning transfer window and air shower transfer window?

The self-cleaning model focuses on air purification in the cavity, while the air shower model focuses on using the nozzle airflow to blow the material surface. It should be determined based on the processing objectives, packaging status and whether the material allows purging.

Q3: Does the electronic interlocking transfer window have a self-cleaning function?

uncertain. Electronic interlocking is a door control method, and self-purification is an air treatment function. They need to be configured separately.

Q4: Are all stainless steel transfer windows made of 304 material?

A: You cannot judge based on the name alone. The material grade should be clarified, as well as the specific material range of the inner liner, outer box, door frame, bottom plate and edge.

Q5: Which structure should be chosen for large items and carts?

A: It can be evaluated from the floor-to-ceiling transfer window, but the effective opening, bottom plate, wheel pressure, sill and ground interface need to be confirmed separately.

Q6: Can the transfer window be connected to the existing automatic production line? ?

A: It can be evaluated based on existing equipment data. It is necessary to jointly check the materials, conveying elevation, transition gaps, door movements, control interfaces and exception handling.

Q7: Can sterilization be achieved after configuring a filter or UV lamp?

A: This cannot be determined directly. Air particle control and sterilization have different goals, and appropriate processes should be adopted and verified according to actual requirements.

Q8: Can we only provide on-site drawings and let Aili Industrial assist in model selection?

A: You can first evaluate the layout and openings, then add materials, loads, operating procedures and functional objectives, and gradually confirm the plan.

Q9: Can Aili Industrial customize the transfer window according to site conditions?

A: Yes. Aili Industrial can confirm the inner cavity, door body, material, load-bearing and installation interface of the transfer window based on material size, weight, transfer frequency, wall openings, wall thickness and operating space on both sides. When self-purification, air shower or automatic conveying functions are required, the filtration configuration, air flow organization and control linkage can also be confirmed in conjunction with the process flow. If we already have on-site drawings or material information, we can further communicate on the non-standard customized delivery window solution. .


Not sure which transfer window is right for your application?

Customized delivery window solutions for your special needs

Provide your installation dimensions, air volume/wind speed requirements and usage environment, and the Aili industrial engineering team can assist you in matching the solution.

Still want to know more about the technical issues of the transfer window?

View more transfer window selection and technical issues to obtain more complete air filter knowledge and solutions.
Aili Industrial develops and manufactures FFU, EFU, HEPA/ULPA air filters, high-efficiency air supply vents, fan boxes and other clean air equipment. Relying on motors, fans, control systems, filters and complete machine supporting capabilities, we provide selection and customization support for clean room and production equipment projects.

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