CE Standard Pharmaceutical Stainless Steel Weighing Booth

Weighing booth is also called sampling booth and dispensing booth, which use vertical single-direction laminar flow. Return air is prefiltered by prefilter first to sort out big particle in airflow. Then air is filtered by medium filter for the second time in order to protect HEPA filter. Finally, clean air can enter working area via HEPA filter under the pressure of centrifugal fan to achieve high cleanliness requirement. Clean air is delivered to supply fan box, 90% air become uniform vertical supply air via supply air screen board while 10% air is exhausted out via airflow adjusting board. All air is handled by HEPA filter, so all supply and exhaust air don’t carry remaining dust to avoid twice contamination. Due to stable single-direction airflow in working area, dust particle is handled by prefilter and medium filter. The unit has 10% exhaust air that cause negative pressure compare to outside environment, which ensure dust in working area not to spread to outside to some extent and protect outside environment.