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Site: Home > Related Articles > What are the parameters of the meltblown cloth bacterial filtration efficiency (BFE) tester

What are the parameters of the meltblown cloth bacterial filtration efficiency (BFE) tester

Author: Released in:2021-04-02 Click:15

What are the parameters of the meltblown cloth bacterial filtration efficiency (BFE) tester

Applicable standards:

   YY0469-2011 "Technical Requirements for Medical Surgical Masks" Appendix B Bacterial Filtration Efficiency (BFE) Test Method Section B.1.1.1

  Q/0212 ZRB003-2011 Bacteria filtration efficiency of medical surgical masks

  ASTMF2100, ASTMF2101, European EN14683

The main parameters:

  1. Sampling flow rate of channel A: parameter range, 28.3L/min; resolution, 0.1L/min; allowable error: better than ±2.5%;

   Channel B sampling flow: parameter range, 28.3L/min; resolution, 0.1L/min; allowable error: better than ±2.5%;

  2. Spray flow rate: parameter range, (8~10)L/min; resolution, 0.1L/min; allowable error: better than ±5.0%;

  3. Peristaltic pump flow: parameter range, (0.006~3.0)mL/min; resolution, 0.001ml/min; allowable error: better than ±2.5%;

  4. Pressure in front of the A-channel flowmeter: parameter range, (-20~0)kPa; resolution, 0.01kPa; allowable error: better than ±2.5%;

  The pressure before the B-channel flowmeter: parameter range, (-20~0)kPa; resolution, 0.01kPa; allowable error: better than ±2.5%;

  5. Pressure before spray flowmeter: parameter range, (0~300)kPa; resolution, 0.1kPa; allowable error: better than ±2.5%;

  6. ​​Negative pressure of the aerosol chamber: parameter range, (-90~-120)Pa; resolution, 0.1Pa; allowable error: better than ±2.0%;

  7. Data storage capacity: >100,000 groups;

   8. High-efficiency air filter characteristics: filtration efficiency for particles above 0.3um is ≥99.99%;

   9. Mass median diameter of aerosol generator: average particle diameter (3.0 ± 0.3) μm, geometric standard deviation ≤ 1.5.

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