English
In the underground working environment of coal mines, rock dust and coal dust exist for a long time, and respiratory protection for workers has always been a key focus of on-site management. Choosing the right set of protective face masks that fit the working conditions of the working face is an essential equipment for long-term underground workers to deal with every day.
The Fangdun 2000 series filter elements achieve a KN100 protection level and are compatible with two face masks, 2102N and 2202N. KN100 is a higher level of protection against non oil particles in the national standard GB 2626, with a corresponding filtration efficiency of ≥ 99.97%. It can cover common coal dust, rock dust, as well as non oil particles such as welding fumes and fiberglass dust generated during operations in coal mines.
From the perspective of protection mechanism, this set of filter elements adopts a three-layer collaborative structure: the first layer mechanically blocks larger particles over 20 microns; The second layer intercepts respiratory dust larger than 5 microns; The third layer captures fine particles at the 0.075 micron level through electrostatic adsorption. The smaller the particle size, the easier it is to enter the respiratory tract with respiration. With the combination of three layers, the filtration efficiency of ultrafine dust can reach over 99.97%, which is consistent with the requirements of KN100 grade.
A shift of underground work often takes eight or nine hours, and the comfort of wearing directly affects whether one can persist in wearing it. The Fangdun 2102N/2202N face mask adopts a concentric high altar three-point buckle design. The filter element can be locked in place with just one buckle on the face mask. Replacing the filter cotton does not require repeated alignment or tightening of nuts. When changing shifts or feeling increased respiratory resistance, it can be completed in a few seconds, reducing waiting time. The filter cotton is tightly attached to the face mask, and the respiratory resistance is controlled at a low level. It is not easy to have a significant feeling of holding breath when worn for a long time.
A few suggestions for practical use: Firstly, conduct an air tightness check before using the new face mask. After wearing it, cover the air inlet with your hand and inhale. If the face mask slightly collapses, it indicates a good fit; The second is to replace the filter cotton in a timely manner when there is obvious dirt and difficulty breathing, and do not wait for breakdown; The third is to regularly wipe and dry the mask body with neutral soapy water to avoid exposure to sunlight and baking.
The working conditions in coal mines are complex, and choosing a set of transparent parameters, easy replacement, and wearable protective equipment is more practical than anything else. This set of KN100 filter elements has parameters that are higher than the national standard, and the buckle design fits the rhythm of on-site shift changes. It is suitable as a daily respiratory protection solution for dusty positions such as coal mines, building materials, and welding.
