COMPLETE SAMPLING TRAIN FOR B.F.E. TEST BACTERIAL FILTRATION EFFICIENCY


The pandemic has led to the conversion of many companies to the production of surgical masks; at the same time there is a growing need in the market for a control test that can guarantee the degree of bacterial filtration of the products designed for the control of biological aerosols such as masks, surgical gowns and filters.

The main challenge of these masks is the fabric used in their manufacturing. In particular, the heart of the problem lies in the “barrier fabric”, that is, in the fabric layer of the mask which must ensure specific performance. The main purpose of a medical face mask is, in fact, to minimize the risk of infection; in the case of a respiratory virus, it is also used to reduce the so-called “viral load”.

The bacterial efficiency test becomes a real validation system that allows you to determine the percentage of particles blocked by the protection at different particle size fractions and is able to determine the resistance of a material to the penetration of bacteria.

 

COMPLETE SAMPLING TRAIN FOR B.F.E. TEST BACTERIAL FILTRATION EFFICIENCY

DATA SHEET DOWNLOAD

 

SAM_2284

The sampling train for B.F.E. test (Bacterial Filtration Efficiency) realized by Mega System is proposed as a complete solution for the analysys of filtration efficiency of surgical masks and other filter materials, in compliance
with EN 14683:2019.
Ease of use and complete control of process parameters through simple adjustments allow to save time and guarantee the repeatability of the test.
The sampling train is complete and includes: nebulizer, nebulisation chamber with air filter and removable cap, filter holder, Andersen multistage impactor 6 stages, water condenser with discharge flask, sucking pump and syringe pump
for a precise dosage. 

 

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The software is specially developed for B.F.E. test and provides features such as leak and flow test, automatic regulation of suction flow rate, export of recorded data to USB and nebulisation electronic control
through air compressed regulation and feed rate with syringe pump.

METHODOLOGY OF THE BFE TEST

La normativa che descrive i metodi di prova per le maschere facciali ad uso medico è la EN 14683.

Allegato senza titolo 00275

The procedure consists of the following stages:
– The bacterial suspension (2) is injected by the syringe pump (1)
– The compressed air (6) passes through a pressure regulator with an attached solenoid valve in the nebulizer (3)
– The pump (13) sucks in the air (28.3 lpm as required) and continue through the line
– In the chamber (5) the nebulized bacterial suspension comes into contact with the filtering material under test (7)
– The unfiltered suspension passes through the various stages of the impactor (8) where it is deposited on the Petri dishes
– The air reaches the condenser (10) where it is cooled by water
– The circuit ends with the pump (13) and its flow regulation system (12)

La linea per il test delle mascherine chirurgiche creata da Mega System è completo, semplice da usare ed efficacie.

DATA SHEET DOWNLOAD