한국필터시험원에서

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Performance Test of Medical and Asbestos Negative Pressure Instrument

Negative pressure instruments at industrial and medical sites maintain indoor pressure at negative pressure to block the outflow of harmful substances such as indoor viruses (corona, SARS, Mers, etc.) and asbestos.

HEPA filter (HEPA Filter) is installed in the negative pressure instruments to prevent the leakage of such pollutants and its stability must be guaranteed through performance tests accordingly.

1. HEPA filter Test

When tested with fine aerosol (DOP, PAO, etc.) particles of 0.3 μm size, the removal efficiency shall be 99.97% or higher.

2. Aerosol Leak Test (0.3 μm particles) for Negative pressure Instrument

When tested with fine aerosol (DOP, PAO, etc.) particles, the removal efficiency at the rated flow rate shall be 99.95% or higher.

3. Negative Pressure Performance Test

Medical facilities equipped with negative pressure shall have a differential pressure not less than -2.5 Pa between internal and external pressures