Compact HEPA filter for Laminar Flow has a relative low sectional air Flow velocity around 0.36m/s~ 0.45m/s. With features of high efficiency, low resistance ,uniform wind speed and long service life. They normally apply to purification equipment such as self-purification pass box,Negative Pressure Weighing Hood ,Laminar Flow Hood ,Laminar Trolley ,clean work bench and so on.Mechanical sealing or gel sealing for option.