Filters and absorbers for masks and respirators
As we mentioned elsewhere, there is no universal mask that will provide protection against all agents and in all conditions. The same is true of filters that make the mask do its job. In our store you will find filters for masks and canisters, allowing you to protect your respiratory tract from harmful substances - dust and gases.
Safe filters for masks
In order for a mask to provide protection for the respiratory tract, it should be equipped with a filter, which is replaced at intervals recommended by the manufacturer. Filters for dust masks are divided by class into:
P1 - filtration efficiency in them is 80% for particulates with an NDS (maximum permissible concentration) of greater than or equal to 2mg per cubic meter. Applies to substances of low toxicity.
P2 - filtration efficiency is 94%, such a filter provides protection against solid and liquid particles with an NDS of more than or equal to 0.05mg per cubic meter. It applies to medium and low toxic substances.
P3 - filtration efficiency is as high as 99.95% for particles with a concentration of less than 0.05mg per cubic meter, applies to solid and liquid particles of high toxicity.
We have arranged the same parameters in a clear table:
|
Class designation |
Filtration efficiency |
NDS |
Type of particles |
Toxicity |
|
P1 |
80% |
≥2 mg/m3 |
solid |
low |
|
P2 |
94% |
≥0.05 mg/m3 |
solid, liquid |
low, medium |
|
P3 |
99.95% |
≤0.05 mg/m3 |
solid, liquid |
high |
Semi-filtering protective masks
Many people who are not familiar with the standards also refer to as masks half-filter respirators, which are increasingly seen even on city streets in recent times. They are equipped with filters that provide protection against various agents.
The additional designation FF- preceding the filter class P1, P2, P3 is used in the designation of half-masks, which resemble ordinary masks, but are equipped with a filter. They do not protect the eyes or face from harmful substances, but only the respiratory tract.
Additional letter designations in half-filter masks can specify the scope of protection:
- S are masks designed to protect only against solid particles
- SL protect against both solid and liquid particles
- D stands for increased dust absorption, tested in dolomite dust testing
- C - additional dust absorption tested with coal dust
What range of protection do gas canisters give?
Mask gas canisters, interchangeable components that provide protection against gases, are also used in masks. Designation symbols refer to the type of gases or their nature:
- P - white - dust and liquid aerosols
- A - brown - gases and organic vapors with a boiling point above 65°C
- AX - brown - organic gases and vapors with a boiling point below 65°C
- B - gray - inorganic gases and vapors, except carbon monoxide, e.g. chlorine, hydrogen sulfide
- E - yellow - acid gases and vapors, e.g., sulfur dioxide
- K - green - ammonia and organic derivatives of ammonia
- SX - purple - substances specified by the manufacturer, the so-called special absorber
- NO - blue - nitrogen oxides
- Hg - red - mercury vapors
Each absorber is also assigned a class on a scale of 1 to 3, corresponding to the amount of gas concentration in the air from which it protects. Class 3 protects against concentrations up to 1% and is the highest class. In the offer of BHP Gabi we offer gas canisters in different classes - some models are also equipped with a wear indicator, which is an extremely important addition not only for the comfort of use, but above all for the safety of the person wearing the mask.
In the offer of our store you will find respirators, as well as filters and gas absorbers packaged in larger quantities, from a few to several dozen pieces. Thanks to cooperation with reputable manufacturers such as 3M, ABEK or Jupiter and others, we offer filters and absorbers that allow you to function safely in adverse conditions.