Clean pass box and laminar flow pass box

Both clean pass boxes and laminar flow pass boxes are important equipment in clean rooms, used to transfer items between different clean areas to reduce the number of times the clean room door is opened and reduce the risk of contamination.
A clean pass box is usually made of a stainless steel plate, which is flat and smooth. It has electronic or mechanical interlocking devices to prevent cross-contamination and is equipped with ultraviolet germicidal lamps to disinfect the transferred items. It is generally divided into two types: mechanical interlock and electronic interlock, with the characteristics of flexible opening and durability. The box body and liner are made of stainless steel plate, which is smooth and dust-free. It adopts a new type of ozone-free ultraviolet lamp with high strength and long life. The overall appearance is beautiful, generous, and corrosion-resistant. The overall design is rigorous, the structural layout is reasonable, and it is easy to use.
A Laminar flow pass box is mainly used in biological clean areas for the transfer of items. The main application places include biopharmaceuticals, scientific research units, disease control centers, large hospitals, university scientific research, biological clean, and various clean areas of application. The basic requirements for its performance are relatively high, such as the cleanliness requirement of Class B; double-layer shell inside and outside, arc treatment around the inside to ensure seamless connection; laminar flow design, airflow direction adopts up-send and down-return mode, the bottom adopts 304 stainless steel cold-rolled plate punching design, and is equipped with reinforcing ribs; the filter adopts G4 for primary efficiency and H14 for high efficiency; the wind speed after passing through the high-efficiency filter is controlled at 0.38-0.57m/s; it has a pressure difference function, displays the filter pressure difference, and the accuracy is ±5Pa; it has rich control functions, including fan start/stop button, built-in electronic door interlock, separate switch control of ultraviolet lamp and lighting lamp, etc. In terms of material requirements, the inner and outer surfaces and frames, visual windows, fillets, HEPA filter frames, and outlet surface flow equalizers of the laminar flow pass box have strict material and specification requirements. In addition, laminar flow pass boxes have specific requirements and GMP requirements, such as all sensors must be calibrated by a legally qualified calibration unit and provide records and certificates, on-site testing must be carried out after the equipment is installed and a test report must be provided, the equipment surface must be smooth and easy to clean, all wires must be hidden, and the instruments must be calibrated by the legal department. The verification of the laminar flow pass box includes seven major categories: introduction, implementation plan, verification team members, instruments and utensils, strains and culture media, installation confirmation, and operation confirmation, covering the confirmation content of various aspects such as equipment installation, operation, and performance.