There are various kinds of disposable dust masks, and the selection must be based on different operating needs and working conditions.
First of all, it should be selected according to the concentration and toxicity of the dust. According to GB/T18664 "Selection, Use and Maintenance of Respiratory Protective Equipment", as a half face mask, all dust masks are suitable for environments where the concentration of harmful substances does not exceed 10 times the occupational exposure limit, otherwise a full face mask or protection level should be used Higher respirators.
If the particulate matter is highly toxic, carcinogenic and radioactive, the filter material with the highest filtration efficiency should be selected.
If the particulate matter is oily, be sure to select a suitable filter material.
If the particles are needle-like fibers, such as slag wool, asbestos, glass fibers, etc., since the dust mask cannot be washed with water, the mask with tiny fibers may cause facial irritation at the facial seal and is not suitable for use.
For high-temperature and high-humidity environments, it is more comfortable to choose a mask with an exhalation valve. Choosing a mask that can remove ozone for welding can provide additional protection, but if the ozone concentration is higher than 10 times the occupational health standard, the mask can be replaced. Poison combination filter element. For environments where there is no particulate matter, but only some odors, choosing a dust mask with an activated carbon layer is much lighter than wearing a gas mask, such as some laboratory environments, but due to national standards, such masks are not subject to technical performance specifications. .
