German
French
Italian
Portuguese
Japanese
Korrean
Russian
HEPA filter replacement time in theatre air supply ceiling
HEPA filter replacement time in theatre air supply ceilingThe replacement time for high-efficiency filters in the ceiling of the operating theatre supply is based on the number of dust particles with a particle size greater than or equal to 0.5 microns in the cleaned air. Clean laminar flow operating theatres can be divided into four levels: Class 100,000, Class 10,000, Class 1,000, and Class 100. Of these, the higher the number, the lower the level of cleanliness. The main sources of contamination in an operating theatre are people, objects, equipment, etc. People are the largest source of contamination, accounting for approximately 90%. Filtration methods are widely used because of their high capture rate and economy. It is possible to filter out particles or most of the particles in the air. As a result, normal operating theatres are virtually sterile or up to standard. The HEPA filter resistance has exceeded the rated initial resistance of 60 Pa or is equal to 2 x the designed or operated initial resistance for 3-6 months and can be replaced at any time when the criteria are exceeded. The medium efficiency filter resistance has exceeded the rated initial resistance of 80 Pa, or equal to 2 x the designed or operating initial resistance for 6-12 months, and can be replaced at any time when the criteria are exceeded. |
