ENI822-3:2009 Laboratory Automated EN 143 Particle filtration efficiency tester (PFE) 

Scope of application:

PFE tester is used to detect the filtration efficiency of particulate matter such as daily masks and filters. Factory direct sales, mask inhalation and exhalation filter or filtration efficiency tester automated filter tester.

Standards:

EN 149

BS EN143:2000

YY/T 2626-2019 respiratory protection products

ENI822-3:2009

NIOSH 42 CFR 84

Instrument structure:

Including 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.

Technical Parameters:

Oil mist method:

The dry oil-free compressed air enters the aerosol generator at a certain flow rate to produce the aerosol with a certain particle distribution. After screening by the cascade impactor, the particles with the particle distribution meeting the standard requirements are discharged from the aerosol outlet and enter the test pipeline.
During the test, the number of particles in the upstream and downstream of the filter material is monitored, and the whole test process is conducted with a certain flow rate or air volume.

Salt spray method:

The dry oil-free compressed air enters the aerosol generator at a certain flow rate to produce the aerosol with a certain particle distribution. After screening by the cascade impactor, the particles with the particle distribution meeting the standard requirements are discharged from the aerosol outlet and enter the test pipeline.
Because the salt aerosol has static electricity, 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 as follows: mixing the aerosol with heating gas, and then evaporating the water in the aerosol to produce salt particles;