EN 143 - Respiratory protective devices - Particle filters

EN 143:2000 Corrected 2002, 2006, Amended 2006

This standard pertains to the particle filters used as components in unassisted respiratory protective devices. The standard describes the laboratory tests used to assess the filters' compliance with the standard's requirements and the filters' suitability for use with other respiratory protective devices. Filtering face pieces and filters used in escape apparatuses are excluded from the scope of this standard.

Based on their efficiency, particle filters are divided into three categories:

• P1 – low filtration, intended for use against solid particles only
• P2 – medium filtration, subdivided according to the filters' capacity to remove both solid and liquid particles or solid particles only
• P3 – high filtration, subdivided according to the filters' capacity to remove both solid and liquid particles or solid particles only

Class Maximum filter penetration of test aerosol (%) Maximum breathing resistance (mbar*)
  Sodium chloride test at 95 l/min Paraffin oil test at 95 l/min at 30 l/min at 95 l/min
P1 20% 20% 0,6 2,1
P2 6% 6% 0,7 2,4
P3 0,05% 0,05% 1,2 4,2

* 1 bar = 105 N/m2 = 100 kPa

Markings:
• P + particle category
• R (= reusable), or NR (= not reusable /single shift)
• CE marking with approval number of notified body
• Color code: white

Additional markings:
• whether the filter is intended for use in a multi-filter device
• indication (+ expired hourglass symbol) of filter's expiration date, formatted as "yyyy/mm"