What are the advantages of FFU filter unit
With the continuous sublimation of production requirements, our requirements for the production environment are also increasingly high, so our demand for FFU is also increased, not only our clean shed needs to use FFU, now a lot of our automation equipment is also used FFU, today Xiaobian to introduce the advantages of FFU.
The FFU can be used in modular connection, so that the FFU is widely used in dust-free room, dust-free operating table, dust-free production line, assembled dust-free room and local 100-level applications. FFU is equipped with primary and high efficiency two-stage filter. The fan inhales the empty T from the top of the FFU and filters it through the primary and high efficiency filters. The filtered clean air is sent out at a uniform speed of 0.45m /S+20% on the whole air outlet surface. It provides high quality clean air for clean rooms and microenvironments of different sizes and levels of cleanliness. In the reconstruction and renovation of new clean rooms and clean workshops, the cleanliness level can be improved, the noise and vibration can be reduced, and the cost can be greatly reduced. Easy to install and maintain, it is an ideal part for clean environment.
The flexibility of FFU and the high filling rate are very important for IC factories to have the flexibility of cleaning system. If the cleanliness of the workshop needs regional adjustment with the change of process, the cleanliness of the local area can be changed by changing the FU air volume or replacing the speech plate. When it’s densely packed,
Full rate can reach 85.5%.
FFU_ upper ceiling is negative pressure, can play the role of negative pressure sealing ceiling is negative pressure, cleanliness in the air pressure is greater than the pressure in the ceiling space. If there is a gap between the FFU and the bracket seal, the negative pressure makes the empty ring without the HEPA filter can enter the room, which is beneficial to ensure the cleanliness of the clean room.
FFU wind system resistance is small, outlet wind speed is low FFU windward area is large, empty = flow resistance is about 50Pa: return duct cross-sectional area is large. The resistance of the return duct is within 15Pa; The resistance of porous floor and grid is small. The total resistance of return air (including the resistance of porous floor, grid air duct, FFU and final filter) is within 250Pa. FFU outlet wind speed – generally 0.38~0.45m/s.
FFU Low energy consumption per unit air volume After the FFU is used, there is no need to add a pressurized fan, no special equipment room, and avoid the resistance of air supply pipes. When DC/EC(electronic rectifier) motor is used in FFU, the efficiency of the motor can reach 75% to 80%. Each motor can be controlled according to the filter pressure drop to save energy consumption. Therefore, the energy consumption per unit air volume is generally lower than that of the centralized system of a large centrifugal fan.
Post time: Aug-03-2022