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In working environments with dust, smoke, oil mist, etc., self-priming filter type half face mask is a type of respiratory protective equipment that balances convenience of use and protective effect. Fangdun has provided matching solutions for this category, including covers, valve plates, filter cotton, and dust filter boxes. Below is a summary of the parameters.
In terms of the cover, the 1105C/1105K body is made of food grade liquid silicone, which feels close to the skin and is not prone to significant pressure marks when attached to the face; The appearance is designed ergonomically based on the shape of the Chinese face, with an adjustable headband to accommodate different head circumferences. The components are mainly made of ABS material, which is resistant to chemical corrosion, heat resistance, and has a certain degree of toughness. Implement standards GB2626-2019 and GB2890-2022. Some models come with easy to fasten devices, which allow for the removal and installation of the face mask while wearing a safety helmet, reducing the need for repeated wearing and removal.
In terms of respiratory performance, the exhalation resistance of the mask is less than 50Pa and the inhalation resistance is less than 20Pa; the exhalation valve plate adopts a door curtain structure, which helps to expel humid and hot gases and reduce stuffiness. The 7000 series single filter element face mask has been subdivided based on this: the 7200B valve seat is made of PC material, the filter cotton clip is made of ABS material and equipped with a 45 ° knob interface and double-sided buckle, making it easier to install and remove the filter cotton; 7105E is equipped with a cold flow exhalation valve and an enlarged air inlet; The valve seat of 7100F can be separated from the silicone cover for easy cleaning, and the head frame is made of PE soft material. All three models have a single filter element structure, providing a relatively wide field of view.
Filter elements are selected according to the properties of particulate matter: 2102N/2202N is KN100 grade, with a filtration efficiency of not less than 99.97% (GB2626-2019), suitable for non oily particulate matter, with a diameter of 105mm, designed with concentric three-point buckles, and can be installed without distinguishing angles. The materials used are non-woven fabric, electrostatic cotton, and meltblown fabric; 2907P is of KP100 grade and contains 150 grams of remelted spray activated carbon cloth, which balances oily and non oily particles and helps reduce organic vapor odor. It is suitable for welding, machinery manufacturing, coal mining, chemical and other scenarios. If there are sparks or liquid splashes on site, waterproof covers or waterproof cover boxes can be installed; When it is necessary to simultaneously prevent toxic gases, the FJ-35 receiver can be paired with a 5000 series filter box.
Selection prompt: First confirm whether the particulate matter is oily or non oily, whether it is accompanied by organic vapor, and then determine the filter cotton grade; The cover focuses on fit and headband adjustment. Filter cotton is a consumable item, and it is recommended to establish replacement records based on frequency of use.
