Product Description:

What is laminar flow transfer window?

Application of laminar flow transfer window:
It is mainly used for the transfer of items in biological clean areas, and is mainly applied in various clean areas such as biopharmaceuticals, research institutions, disease control centers, large hospitals, university research, biological cleanliness, and applications.

Introduction to laminar flow transfer window:
Laminar flow transfer window is an auxiliary equipment in clean rooms, mainly used for the transfer of small items between clean areas and between clean areas and non clean areas, in order to reduce the number of door openings in clean rooms and minimize pollution to the clean room. The laminar flow transfer window is made of stainless steel plate, which is flat and smooth. The two doors are interlocked to effectively prevent cross contamination, equipped with electronic or mechanical interlocking devices and equipped with ultraviolet sterilization lamps.

Basic performance requirements for laminar flow transfer windows:
1. Cleanliness requirements for laminar flow transfer windows: Class B;
2. Double layered inner and outer shell, with circular arc treatment around the inside to ensure seamless connection;
3. Adopting laminar flow design, the airflow direction adopts an upward return mode, and the bottom adopts a 304 stainless steel cold-rolled plate punching design with reinforcing ribs;
4. Filters: G4 is used for the initial efficiency filter, and H14 is used for the high-efficiency filter;
5. Wind speed: After passing through the high-efficiency filter, the outlet wind speed is controlled at 0.38-0.57m/s (tested 150mm below the high-efficiency outlet flow plate);
6. Differential pressure function: display filter differential pressure (range high efficiency 0-500Pa/medium efficiency 0-250Pa), accuracy ± 5Pa;
7. Control function: Fan start/stop button, equipped with built-in electronic door interlock; Set up UV lights and design separate switches. When both doors are closed, the UV lights should be in the on state; Set up lighting fixtures and design separate switches;
8. The high-efficiency filter can be disassembled and installed separately from the upper box, making it easy to maintain and replace the filter;
9. Set up an inspection port at the bottom of the transfer window for the maintenance of the fan;
10. Noise: During normal operation of the transmission window, there is noise. 11. High efficiency air distribution plate: made of 304 stainless steel mesh plate.

Material selection requirements for laminar flow transfer windows:
1. The inner and outer surfaces as well as the frame of the laminar flow transfer window are made of 304 stainless steel cold-rolled plates with a thickness of ≥ 1.5mm. The surface is polished and the surface smoothness should not be lower than RA1.2;
2. The frame of the laminar flow transfer window is made of 304 stainless steel, with a thickness of ≥ 1.2mm, and the surface is polished with a surface finish of not less than RA1.2;
3. The visual window of laminar flow transfer window adopts tempered glass, and the thickness of tempered glass is ≥ 8mm;
4. Rounded corners: Made of 304 stainless steel, with a thickness of ≥ 1.2mm, the surface finish after polishing treatment should not be lower than RA1.2;
5. The high-efficiency filter frame is made of aluminum alloy;
6. The uniform flow plate on the outlet surface of the high-efficiency filter is made of 304 stainless steel mesh plate, with a thickness of ≥ 1.0mm and no burrs.

Installation method of laminar flow transfer window:
Choose a convenient location on the wall, then open a hole that is generally about 10mm larger than the diameter of the transfer window. Place the transfer window into the wall, usually installed in the middle of the wall, to maintain balance and fixation. Use rounded corners or other decorative strips to decorate the gap between the transfer window and the wall, and seal it with glue for decoration.

Environment and conditions for using laminar flow transfer windows:
>>Temperature: 5 ℃~35 ℃
>>Relative humidity: not greater than 85% [+35 ° C]
>>Atmospheric pressure: 86kPa to 106kPa

Verification and installation confirmation of laminar flow transfer window:
The supplier's technical personnel serve as the main installation personnel, and the engineering department personnel assist in the installation. Check the device and its working status during the installation process. If it is found during the confirmation process that the deviation is caused by the UV lamp tube not meeting the requirements, the engineering department personnel are responsible for the purchase and replacement of the UV lamp tube. Record the installation confirmation results in Attachment 1 and Attachment 2.

Confirm project description
The work environment confirmation transfer window should be installed between the non clean area (cultivation room) and the clean area (clean corridor). The temperature in the non clean area should be between 18 ℃ and 27 ℃; The relative humidity should be between 40% and 80%.
The power supply of the power confirmation device should be connected correctly, and the working power supply is AC (220 ± 22) V.
Confirm the power of the ultraviolet lamp tube through device confirmation.
The UV lamp tube should be normal, undamaged, matched, and tightly connected.
The door gasket on the side of the transfer window should be matched, tightly fitted, and intact.
The interior of the transmission window and the surface of the ultraviolet lamp should be clean and free of dust.
The material of the inner surface of the transfer window should be stainless steel, smooth, polished and wear-resistant.
Confirm if there are spare UV lamps of the same model and specifications available.

Verification and operation confirmation of laminar flow transfer window
Operation confirmation is carried out after installation confirmation. If there are deviations in installation confirmation, they must be resolved before proceeding. By conducting trial runs on the transmission window, it is demonstrated that the technical parameters and functions of the equipment can meet the requirements set by our company. Record the operation confirmation results in Attachment 3 and Attachment 4.
7.1 SOP Confirmation: Confirm whether there is an SOP for the use of the transfer window as technical support and guidance for the operation of the transfer window. The entire verification process must strictly follow this SOP to operate the transfer window.
7.2 Equipment operation function confirmation: Confirm each operation function item by item, and the results should meet the requirements.
7.3 Interlock Confirmation: Interlocking devices are installed on both sides of the doors to ensure that they cannot be opened simultaneously.
7.4 Radiation intensity measurement: After turning on the UV lamp for 5 minutes, use a UV intensity meter with a center wavelength of 253.7nm to measure the irradiance value (uW/cm2) at the vertical center operating surface below the lamp tube. For ordinary or low ozone straight tube ultraviolet lamps, the irradiance value of the new lamp tube should be: power 10W, ≥ 65 uW/cm2; Power 15W, ≥ 145 uW/cm2. The irradiance value of the lamp in use: power of 10W, ≥ 45 uW/cm2; Power of 15W, ≥ 100 uW/cm2, those below this value should be replaced.
7.5 UV intensity distribution: After turning on the UV lamp for 5 minutes, measure the UV intensity (uW/cm2) at 5 positions in the center and four corners at the bottom of the transfer window to determine the weakest position of UV intensity. The time when the weakest position of ultraviolet intensity reaches the required irradiation dose is taken as the qualified disinfection time.

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Original product source: Primary filter http://www.chuxiaofilter.com/