What is the FFU? FFU (Fan Filter Unit) is a combination of fans and filters, also known as "Cabin Fan filtration equipment." FFU are usually installed in the end of cleanroom air, usually placed on the lifting of the "dry" gasket seal keel framework. FFU upper part of the fan module, the lower part of the filter. According to the requirements of cleanliness, filters for different levels of efficiency (HEPA) or ultra-efficient (ULPA) filters to provide clean air for clean rooms. Fan modules in addition to the lower part of FFU to overcome the resistance of the filter efficiency, but also to overcome the resistance of the entire cycle of wind all parts of the channel, in order to maintain the set of operating wind speed. Design and construction of FFU system is simple, flexible speed adjustment, easy to clean area changes and other features, it has become one of the popular system in the form of industrial clean room. FFU having characteristics: First: flexibility. Because FFU is to limit self-powered, it is not the region. In a huge clean room where, according to need, zoning control. Moreover, with the trends in the semiconductor manufacturing process, plant layout is bound to be adjusted accordingly, the flexibility of FFU makes this adjustment easier, and will not bring secondary investments. Second: reusability. Theoretically, sometimes without the FFU equipment, can be removed, sealed, safekeeping, left the next use. Third: The negative pressure ventilation. This is a unique feature of FFU. Because it itself can provide static pressure so that the clean air plenum with respect to plant negative. Thus, the static pressure inside the particles will not be pressure on the role of the leak to the clean area, so that the seal becomes very simple and safe. Fourth: shorten the construction period. Eliminating the need for the use of FFU duct fabrication and installation, because the wind pipe in a clean project, takes up a lot of construction period, any investor wants to invest can bring benefits as soon as possible, the choice of FFU become a possibility. Fifth: to reduce operating costs. While the selection of FFU, the initial investment than using high ventilation duct, but it is running late, outstanding performance energy-saving, maintenance-free characteristics. With a 40% reduction in cycle operating costs. FFU combination of key performance parameters: modulus size (ceiling modular size): installing ceiling keel centerline spacing, FFU commonly used standard modulus size is 1200X600 (4'X2 '), 1200X900 (4'X3'), 1200X1200 ( 4'X4 '). Actual size (actual size): Actual Size FFU filter = modulus size - (keel section width -25mm), the actual size of the fan module is slightly larger than the filter 4mm. For example, commonly used in the end face of the ceiling of the keel width is 55mm, the size of the modulus corresponding to the actual size of the FFU 1200,900,600 1170,870,570 filters, the actual size of the fan module is 1174,874,574. FFU machine outside the residual pressure (ESP): Under a certain set speed, the total static pressure fan module (TSP) deductions HEPA / ULPA filter resistance, namely machine outside the residual pressure (ESP), the unit is Pa. ESP is the ability to overcome the clean room FFU whole cycle of wind resistance, whether it is labeled total static pressure TSP FFU machine outside the residual pressure or fan modules are essential named blowing wind speed or wind, otherwise it does not make sense. Energy input (input power consumption): FFU input voltage and the normal operation of the product of the input current, the unit is W. Obviously, FFU operating conditions in different points, that is, when different operating air volume and total static pressure, enter a different energy. Therefore, if you do not specify operating conditions point, enter energy value does not make sense. Monomer noise (noise level): According to the standard IES-RP-CC002, when the normal operation of FFU at a distance of a wind noise values ??at the center of the surface just below 1.2mm, the unit is dB (A). FFU at different operating point, that run at different air volume and total static pressure, different noise. Therefore, if you do not specify the operating point, the noise level does not make sense. FFU fretting (micro vibration): According to the standard IES-RP-CC002, FFU vibration amplitude and vibration rate at the maximum operating conditions point units are mm and mm / s. Uniformity of air (air uniformity): According to the standard IES-RP-CC002, when the normal operation of FFU, point by point distance measuring surface wind direction 150mm (6 ") of the horizontal surface wind speed, average wind speed values ??derived average wind speed. and the maximum wind speed and minimum wind speed deviation ratio is the uniformity of air, the unit is + / -% standard IES-RP-CC002 FFU required at any point of blowing wind speed and its average wind speed deviation should be within +/- .. within 20% filter efficiency rating (filter grade): based on European standards EN1822, filter rating from H10-H14, U15-U17, or according to the American standard MIL-282 (HEPA), the efficiency value for 0.3um; according to the US Standard IES-RP-CC007.1, the efficiency value for 0.12um FFU fan module has the following features: reliable performance: the use of domestic exports of branded internal rotor motors and straight blades and electrical components expelled heart model is complete: The motor AC (AC) and brushless DC (EC); according to the output HIP has standard and high static pressure type; according modulus sizes 1200X600,1200X900,1200X1200,1500X750; according to cabinet materials are zinc-aluminum coated steel ( standard), stainless steel type, aluminum excellent uniformity of the wind: and better than the international standard IES-RP-CC-002 +/- 20% in the low-noise requirements: Science fan motor speed selection and design, unique sound deadening material diversion and application of reasonable size box design, the noise level is lower than similar products FFU low vibration: vibration rate of the total is less than 1mm / s, amplitude does not exceed 4um low power consumption and low heat dissipation the amount of first-class quality and balancing the fan design, and the box itself is zero pressure loss, so creating FFU running at the same output power and cooling conditions less than similar products Flexible Control Options:. AC type can be single independent or grouped transformer governor governor, and both alarm indicator FFU main technical parameters: Model FFU-2 × 2 FFU-2 × 3 FFU-2 × 4 FFU-3 × 4 FFU- 3 × 4 FFU-4 × 4 Dimensions (mm) (WXDXH) 575 × 575 × 320 575 × 875 × 320 575 × 1175 × 320 875 × 875 × 320 875 × 1175 × 320 1175 × 1175 × 320 surface wind speed 0.45 ± 20% noise dB (A) (wind speed 0.45m / s, from the outlet side 0.5m) 48 48 48 48 52 52 HEPA filtration efficiency ≥99.99%@0.3um HEPA standard 570 × 870 × 90 570 × 870 × 90 570 × 1170 × 90 870 × 870 × 90 870 × 1170 × 90 1170 × 1170 × 90 Power AC single phase, 220V / 50Hz power (W) (wind speed 0.45m / s) 120 125 140 180 240 280 machine outside the residual pressure ( Pa) 50 ~ 130 vibration ≤4um Cabinet Material Galvalume / stainless steel / aluminum / cold plate Note: The company's products continue to improve, some of the performance parameters may be modified without notice FFU FFU as a centralized monitoring system seed cleaning equipment, is currently widely used in a variety of clean project. FFU centralized monitoring system is put dozens, hundreds or even thousands of FFU FFU monitored by the host to link up and monitored, and can be uploaded to a computer, computer system easily achieved by partitioning the fan stops, fault alarm, History and other functions. When the computer is turned off, the host can independently monitor 24-hour surveillance. Because this system for FFU power small, but the number of units and more occasions, so the use of a computer to facilitate centralized monitoring, the system consists of the following four parts:? A drag two intelligence unit (using capacitors, transformers, surge-type or motor tapped speed)? ? 32 FFU control of the host computer hub centralized monitoring system and low voltage control cabinet FFU control system diagram as shown below:?? FFU System features: The control system also enables the following functions:? AC voltage mode control system can guarantee under normal conditions of use for a long time trouble-free continuous operation;? the entire control system layout is reasonable, simple wiring;? in meeting the requirements of the premise of clean, wind speed speed can be set according to actual situation, to minimize fan power consumption, save energy;? the fan speed to work / duty control, in the non-working hours, reducing the fan speed automatically to maintain