Experimental parameters of meltblown cloth bacterial filtration efficiency tester
Medical surgical masks can effectively prevent the spread of pathogens and protect healthy people. The bacterial filtration efficiency is the percentage of aerosols filtered out by the medical surgical mask filter material at a specified flow rate, which is an important parameter for evaluating the performance of medical surgical masks. The BFE system generates bioaerosols in an artificially controllable environment and evaluates the protective performance and safety of medical surgical masks by calculating the microbial aerosol filtration efficiency. The system program has three modes: purification, maintenance, and experiment, which not only ensures the accuracy of the experimental results, but also ensures the safety of the experimenters, experimental samples, and experimental environment.
The meltblown cloth bacterial filtration efficiency (BFE) tester adopts a dual-gas-path simultaneous comparison sampling method to improve the accuracy of sampling. It is suitable for performance testing of mask bacterial filtration efficiency by metrology and verification departments, scientific research institutes, mask manufacturers, and other relevant departments.
Shanghai Qianshi Precision Electromechanical Technology Co., Ltd. was established in 2012. It focuses on the research and development, design, and production of textile testing instruments, and provides textile testing instruments and services for academic research units and testing institutions. Shanghai Qianshi is one of the most competitive and R&D-capable textile testing instrument manufacturers in China. The R&D team is composed of a group of experienced engineers. We are committed to serving customers wholeheartedly and working hard to promote technological innovation in textile testing instruments.
Experimental parameters:
1. Sampling flow rate of A channel: 28.3L/min, resolution: 0.1L/min
2. Sampling flow rate of B channel: 28.3L/min, resolution: 0.1L/min
3. Spray flow rate: (8~10)L/min, resolution: 0.1L/min
4. Peristaltic pump flow rate: (0.006~3.0)ml/min, resolution: 0.001ml/min
5. Pressure before flow meter of A channel: (-20~0)KPa resolution: 0.01KPa
6. Pressure before flow meter of B channel: (-20~0)KPa resolution: 0.01KPa
7 . Pressure before spray flowmeter: (0~300)KPa, resolution: 0.1KPa
8.Ambient temperature: (-40~99)℃, resolution: 0.1℃
9. Aerosol chamber negative pressure: (-90~-120)Pa, resolution: 0.1Pa
10. Cabinet negative pressure: -50~-200Pa
11. Data storage capacity: >100000 groups
12. Vortex mixer test tube specifications and quantity: Φ16×150mm test tube, eight pieces
13. High efficiency air filter characteristics: Filtration efficiency for particles above 0.3um ≥99.99%
14. Aerosol generator mass median diameter: 3.0± 0.3μm, geometric standard deviation ≤1.5
15. Dual-channel 6-level Andersen: Level I>7μm, Level II 4.7-7μm,
16. Sampler capture particle size: Level III 3.3-4.7μm, Level IV 2.1-3.3μm, Level V 1.1-2.1μm, Level VI 0.6-1.1μm
17. Aerosol chamber specifications: 60cm (length) × 8.5 cm (diameter) × 3cm (thickness)
18. Total number of positive quality control sampler particles: 2200±500c
19. Negative pressure cabinet ventilation flow: ≥5m3/min
2024-12-24 10:37