FFU installation conditions and seven steps (FFU high efficiency filter)
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Temperature: 5 ° C ~ 45 ° C
Relative humidity: no more than 85% (+35 ° C)
Atmospheric pressure: 86Kpa~106Kpa
Zui big dust concentration: 3500 grains / liter (dust particle size is not more than 0.5um)
Power: 220V 50HZ
FFU installation conditions and seven major steps:
1. The clean room must be sealed when it is installed. It takes about 3 days for the fresh air conditioner to send clean air, and the room is kept clean and free of dust. All keels have been installed and leveled.
2. Installers must be equipped with clean clothes and clean gloves to prevent artificial contamination of the FFU cabinet and high efficiency filters.
3. It is recommended that the number of installed personnel in each group be 6 people.
4. Since the high-efficiency filter uses ultra-fine glass fiber filter paper, the filter material is easily broken and damaged, resulting in leakage. Therefore, handling, unpacking, and installation must not fall or collide with the filter during installation. It is strictly forbidden to touch the filter material with fingers or other objects.
Explain the FFU installation conditions and seven steps:
*Step: The tools required to install the FFU and the aluminum ladder are all ready. The 2 installers on the ceiling are ready, the pedal keel, the hand-suspended bolt screw, pay attention to safety!
Step 2: Two additional personnel are required to place the FFU on the table, and the high-efficiency filter needs to be ready for installation;
The third step: the personnel are ready, the clean room personnel will send the FFU to the ceiling, and the staff on the ceiling will meet;
The fourth step: the FFU box needs to be tilted and sent;
Step 5: The ceiling personnel lift the FFU box, and the clean room personnel install the high-efficiency filter from the bottom. See the sixth step shown in the figure below: the filter needs to be installed obliquely (note the direction of the high-efficiency filter in the windward direction);
Step 7: After the high-efficiency filter is installed at a stable level, the direction of the FFU box is checked to see if all the sides are pressed against the high-efficiency filter.
The fan filter unit (FFU) has been widely used in clean engineering due to its many advantages such as simple construction, flexible change, space saving and negative pressure sealing. However, in practical applications, due to the large area of ​​the clean plant, the number of FFUs used is large, and there are some corresponding disadvantages, such as high overall noise, large power consumption, and uneven wind speed.
There are more and more manufacturers of FFU on the market, but there are big differences in product performance between different manufacturers. Due to the lack of uniform testing standards, each manufacturer gave. The performance parameters in the FFU sample are obtained by the internal detection method, which results in a large difference in the actual performance of the same size FFU of different manufacturers, and the rationality of the detection method is yet to be verified. Although some scholars at home and abroad have conducted corresponding research on the detection methods of FFU performance, they have not formed a unified standard.
Generally, only FFRUs can be used for products that have been certified for safety. FFU tests can be provided by the company. Test equipment can also be used by third parties to test the air volume, wind speed, and filtration efficiency of the FFU. Durability is the basic of Zui. The important point is that the quality of important parts selected by the product is reliable (through certification), and the other is that the production process/quality management of the manufacturer should be strict.
The use and functional tests are definitely subjective. In our FFU department, most of the engineers are technical engineers for many years. He will judge the use and function of this product according to the habits of foreigners. fulfil requirements. For the FFU test requirements, different organizations have their own different test plans, or from another source, your product buyers provide the corresponding test requirements to their designated test organization to do so.
Before the FFU test report is issued, the test organization will open a technical meeting with the manufacturer to further discuss the test results.
The Fan Filter Unit (FFU) is a combination of a fan and a filter to form a self-powered end purification device. FFU has been widely used in clean rooms for more than ten years. At present, there are many FFU manufacturers on the market, and the performance of FFU products is uneven. Through sample collection, experimental research, data analysis, and CFD software, this paper studies the performance of FFU and its influencing factors. By collecting samples from different manufacturers, we can understand the problem that the FFU product performance evaluation indicators are not uniform, the performance test methods are not standard, and the sample data is monotonous. In this paper, the FFU performance test method and performance evaluation index conforming to the IEST standard are adopted. The performance of the FFU samples of five different manufacturers is tested. The test results show that the performance of different FFU products on the market (including aerodynamics, energy consumption, noise... The Fan Filter Unit (FFU) is a combination of a fan and a filter to form a self-powered end purification device.
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