English
The actual protective effect of gas masks in painting, chemical, laboratory operations, emergency rescue and other scenarios largely depends on the small filter box at the front end. Choosing the right model is often more crucial than simply focusing on the mask body.
Taking the Fangdun5000 series as an example, the filter box is divided into multiple models according to the protection object: 5101 corresponds to A1 level, used for protecting organic gases or vapors, such as benzene, carbon tetrachloride, nitrobenzene, cyclohexane, etc; 5103 corresponds to E1 level, targeting sulfur dioxide and other acidic gases or vapor gases; 5105 corresponds to K1 level, suitable for ammonia and organic derivatives of ammonia environments; 5106 corresponds to CO1 level, used for protecting against carbon monoxide; 5107 belongs to the comprehensive protection model, suitable for mixed gas environments with complex components, including organic vapors or inorganic gases, chlorine gas, chlorine dioxide, cyanide chloride, sulfur dioxide, hydrogen fluoride, hydrogen sulfide, ammonia, methylamine, and formaldehyde. 5108 is an A1E1 composite grade that can simultaneously handle organic gases or vapors, sulfur dioxide, and other acidic gases or vapors; When selecting, it is recommended to first clarify the types of pollutants in the work environment, and then match the corresponding levels.
In terms of structural design, this series adopts a dual filter box layout, which results in a more even distribution of respiratory resistance. When worn, the forces on both sides of the face are more balanced, and the comfort of long-term work has been improved to some extent. The box body adopts ABS material trapezoidal groove structure, matched with three-stage interface, with clear positioning and proper clamping during installation. The interior is a grid structure filled with coconut shell activated carbon blocks, which are soaked in chemical solution and treated with special carbon technology. When gas passes through, the contact area with the filter material is larger, the adsorption process is more complete, and the overall service life of the filter box is correspondingly extended.
If dust and harmful gases coexist in the work environment, a 5101N filter cotton cover and 5101N filter cotton can be installed at the front end of the filter box to form a dust and toxin combination protection: the filter cotton is responsible for intercepting particulate matter, and the filter box is responsible for adsorbing gases, with clear division of labor between the two.
Finally, there are two usage reminders: the filter box is a consumable item, and it should be replaced in a timely manner when you smell an odor or feel obvious difficulty breathing; Before each use, it is necessary to check the fit between the mask and the face, and confirm that the filter cartridge model matches the working environment. The value of protective equipment lies in choosing it correctly, wearing it properly, and changing it in a timely manner.
