The Weighing Hood provides a ertical unidirectional airflow, some clean air circulation in the work area, partly discharged to the nearby area, so that the work area produce negative pressure to prevent cross contamination in order to ensure the high clean class level of the working area.
Negative pressure weighing room is a kind of local purification equipment used in pharmaceutical, microbiological research and scientific experiments. It provides a vertical one-way airflow. Part of the clean air circulates in the working area, and part is discharged to the nearby area, so that the working area generates negative pressure. Weighing and packaging dust and reagents in the equipment can control the overflow and rise of dust and reagents, prevent the harm of dust and reagents to human body by inhalation, and avoid cross contamination of dust and reagents, protecting the external environment and the safety of indoor personnel.
1. Long working life with high quality materials.
2. Flexible and compact Structure..
3. Unique designed air duct effectively controls the noise.
4. Uniform flow designed for main working area can protects the operators and remove environmental pollution and cross contamination of products away.
5. With intelligent monitoring of HEPA filter life, it is easy for maintenance and replacement, it is cost effective.
6. Smooth transitions of wall and ground can eliminate the blind angle.
7. High clean class level of the working environment with the continuous negative pressure to prevent cross contamination.
8. The overall welding combined with the special sealant.
9. Double overheat protection of the fan.
The equipment consists of several parts: work area, return air box, fan box, air outlet box and outer box. The control panel is located in front of the working area inside the equipment. The control panel uses a touch-type LED control panel, which can control the start and stop of the fan, adjust the fan working conditions, and adjust the wind speed required in the working area. There is a differential pressure gauge next to it to test the resistance of the filter. There is also an exhaust adjustment plate inside the air supply box, which can adjust the exhaust volume of the equipment within a reasonable range.
| Model | BAC-NPWR-A01 | BAC-NPWR-A02 | BAC-NPWR-A03 | BAC-NPWR-A04 |
| Cabinet Size (mm) | 1200*1300*2350 | 1500*1300*2350 | 1800*1300*2350 | 2000*1300*2350 |
| Internal Size (mm) | 1100*800*1950 | 1400*800*1950 | 1700*800*1950 | 1900*800*1950 |
| Air flow(m³/h) | 1400 | 1800 | 2200 | 2500 |
| Power supply(V/Hz) | 380/50 220/50 | |||
| Cabinet material | stainless steel | |||
| Power(W) | 300 | 300 | 600 | 600 |
| Filter efficiency | PRE filter/Medium filter/HEPA filter | |||
| Noise dB(Near from HEPA filter) | <67 | |||
The equipment adopts vertical unidirectional airflow. The return air is first pre-filtered through the primary filter to remove large dust particles in the airflow. The pre-treated air is then filtered through the medium-efficiency filter for secondary filtration to fully protect the high-efficiency filter. Under the pressure provided by the centrifugal fan, it passes through the high-efficiency filter to meet the cleanliness requirements. The operation area and the external environment form a relative negative pressure, thereby ensuring that the dust in this area will not spread to the outdoors, playing a role in protecting the external environment.
It is widely used in local purification equipment for pharmacy, microbiology research and scientific experiments. It also can be used in some workshops for sampling,weighing, analysis and other industries and so on.
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