Various Types of Filters Used in Gas Masks

There are many types of gas mask filters based on the nature of gases and vapors. Each type of filter is labeled with a number and a color code specific to each gas or gas group according to the EN14687 standard. It is possible that there are three respiratory protection efficiency levels for each gas family, as per the EN143/A1 standards.

The maximum allowed concentrations (gas or liquid) of toxic substances will vary depending on the type of mask (half mask or complete face mask). 50 times the OEL For a half-mask respirator, the occupational exposure limit is 2000 times the OEL For a full-face respirator. For full-face protection, you can check out m 15 gas mask on that is designed with a special Israeli M 15 filter system.

– Class 1Filter canister(A1 or ABEK1): Lower capacity efficiency, a lower gas rate below 0,1%Volume

– Class 2Cartridge filter(A2B2 and ABEK2) – Intermediate capacity, gas rate below 0.5%Volume

– Class 3: For a gas rate below 1% volume

Filter for particles

The following three categories are made up of particles filters:

– P1 Class – Lower efficiency, blocking m inimum 80%(penetration less than 20%)

– P2 Class – Intermediate Efficiency, Blocking Minimum 94% of the substance (penetration less than 6%).

– P3 Class – Higher efficiency, blocking Minimum 99,95%The substance (penetration less than 0,05%)


Gas and particles combined respirator cartridge

As suggested by their name, combined filters block both gases and particles. Air first enters the particle filter and then goes through the gas filter (composed of activated carbon). Their codification remains the same with letters (for gases), figures (for the efficiency class), and the particle class level: example ABEK2-P3.