Instrument introduction
The automatic filter material tester can simulate the actual use environment of the mask or filter material, and test the filtration efficiency and resistance based on the oil mist and salt mist methods required by the standard.
The test parameters meet the requirements of NIOSH 42 CFR Part 84 and GB / T 2626.
In addition, the automatic filter material tester can also test the permeability of the filter material, the test aperture: 1 / 1, 1 / 2, 1 / 4, 1 / 8; test material: layer mask or filter material;
Test method: salt spray test
The dry oil-free compressed air enters the aerosol generator at a certain flow rate to produce aerosol with a certain particle distribution. After screening by the cascade impactor, the particles with a particle size distribution meeting the standard requirements are discharged from the aerosol outlet and enter the test pipeline.
Due to the static electricity generated by the salt aerosol, it is necessary to neutralize the salt aerosol. And for the salt aerosol, it needs to be heated to produce salt particles.
The method is to mix the aerosol which meets the particle size requirements with the heating gas, and then the water in the aerosol is evaporated to produce salt particles.
And reach to the filter material. Differential pressure sensors are installed on both sides of the filter material. During the test, the number of particles upstream and downstream of the filter material is monitored; the whole test process is conducted with a certain flow or air volume
Test parameters:
Filtration efficiency, filtration resistance, etc;
The automatic filter material tester can accurately evaluate the filter performance of the mask or filter material, provide data basis for the research and development of new filter material, product quality control, material performance verification, etc., and is the best choice for product performance verification in scientific research, testing, industrial production and other fields.
technical parameter
1. Applicable filter material: ⑴ glass fiber filter material ⑵ PP filter material ⑶ membrane filter material; etc
2. Particle size grade: 0.3, 0.5, 1.0, 2.0, 5.0, 10.0 μ m (Grade 6)
3. Flow range: 0-150 L / min
4. Detection resistance range: 0-1000 pa
5. Dust source:
(1) aerosol (dehs)
Middle diameter of quantity: 0.18um; middle diameter of quality: 0.3um; geometric deviation: less than 1.8;
(2) sodium salt (2% NaCl solution)
Middle diameter of quantity: 0.075um; middle diameter of quality: 0.26um; geometric deviation: less than 1.6;
6. Standard test area: 100 cm2
7. Power supply: 220V / 50Hz
8. System power consumption: ＜ 1500W
9. Boundary dimension: 850mm ╳ 770mm ╳ 1624mm
The instrument structure includes:
Spray pump, electrostatic neutralizer, cylinder, flowmeter, PLC industrial control system, fan, exhaust gas filter, flow transmitter, differential pressure sensor, touch screen computer, oil mist aerosol generator, salt spray aerosol generator, etc.
Product Tags:
|
|
Particle filter performance tester Images
|
