The transfer window serves as an essential tool within cleanroom environments, designed to facilitate the movement of small items between different cleanliness zones—both within the clean area and between clean and non-clean areas. Its primary purpose is to minimize the frequency of opening the cleanroom doors, thereby reducing the risk of bacterial contamination. While the transfer window helps in sterilization, it's important to note that if not cleaned regularly, bacteria can accumulate inside, potentially leading to further contamination of the items being transferred. Therefore, maintaining cleanliness is crucial for ensuring the integrity of the cleanroom environment.
Constructed from high-quality stainless steel, the transfer window features a smooth, easy-to-clean surface with rounded internal corners to prevent dirt buildup. The design also allows for efficient and convenient material handling. To prevent cross-contamination, the two doors are equipped with an electronic interlock system, ensuring that only one door can be opened at a time. Additionally, an ultraviolet (UV) germicidal lamp is installed inside to help eliminate any remaining microorganisms on the surfaces of the items being transferred.
During the transfer process, the top section of the window releases high-speed, filtered air that helps remove dust particles from the surface of the materials. Once the cleaning process is complete, the second door can be opened to retrieve the item. This airflow acts as an air lock, preventing outside air from entering the cleanroom and compromising its sterility. The electronic interlocking mechanism ensures that both doors cannot be opened simultaneously, and special sealing strips are installed on the inner sides to maintain airtightness.
Materials entering or leaving the clean area must follow a strict separation protocol. They should only pass through designated material channels within the production area. Upon entry, raw materials are unpacked or cleaned by the responsible personnel before being transported via the transfer window to the workshop’s temporary storage room. Similarly, inner packaging materials are removed from their outer packaging in the temporary storage area and then passed through the transfer window into the clean zone. All material transfers must strictly follow the “open and close†procedure: open the outer door, place the item inside, close it, then open the inner door to retrieve the material. This process is reversed when moving materials out of the clean area.
Semi-finished products are transported through the transfer window to an external temporary storage area and then moved to the outer packaging room via the logistics channel. Materials and waste that are highly susceptible to contamination should be handled through dedicated transfer windows leading to non-clean areas. After each use, the transfer window and surrounding area must be cleaned thoroughly, and both doors should be closed to ensure proper disinfection.
To maintain hygiene, it is recommended to use a specialized cleaning cloth and disinfectant to clean the interior walls, ceiling, UV lamp, and doors of the transfer window. For stubborn dirt, a brush and disinfectant can be used. Regular cleaning and disinfection of the stainless steel transfer window are essential practices. It is advisable to disinfect both the inside and outside of the window weekly. After professional inspection and cleaning, a "cleaned" status indicator card is placed on the window to confirm it is ready for normal use.
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