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Gas mask and dust mask

Precautions and maintenance of gas mask

Before using the gas mask, the nature and concentration of poisons in the working environment and the oxygen content in the air must be clarified. It is absolutely prohibited to use the gas mask before clarifying the working environmental conditions. When the concentration of toxic gas is greater than the specified use range or the oxygen content in the air is lower than 18%, the self-priming filter gas mask (or gas mask) cannot be used. The direct gas mask is required to withstand the volume concentration of toxic gas greater than 0.5%, and the catheter type shall be used. Before use, check the air tightness of parts and joints, and find out the cause in case of air leakage. Check whether all parts are intact, whether the air duct is blocked or damaged, whether the metal parts are rusted, deformed and whether the rubber is aged. Whether the threaded joint is rusted, deformed and tightly connected. Check whether the surface of the poison filter tank is cracked, crushed, whether the threads are intact, whether the tank cover and bottom pistons are complete, whether there are gaskets in the tank cover, and whether there is noise when shaking. Check whether the belt and buckle fastening the gas filter tank in the mask bag are complete and intact. Air tightness inspection of the whole set of gas masks after connection. After checking all parts, it is important to check the air tightness of the overall gas mask. The simple inspection method is: open the rubber bottom plug to inhale. At this time, if there is no air, it is proved that the connection is correct. If there is air leakage, check whether each part is connected correctly. Different types of gas masks shall be selected according to the labor intensity and the concentration of harmful substances in the air of the working environment. For example, the gas mask of small gas filter tank can be used in low concentration operation environment. The effective time of the canister shall be strictly observed. In the process of use, the used time, poison properties, concentration, etc. of the filter tank must be recorded. If the accumulated use time on the record card reaches the specified time of the poison filter tank, it shall be stopped immediately. During use, it is strictly prohibited to unscrew the cover of the poison filter tank (box) at will, and prevent water or other liquids from entering the tank (box). The product must not be in 65. C. if the canister is used in the above environment or stored in high temperature environment, the anti-virus ability will be reduced after moisture absorption. Usually, the canister cover shall be tightened and the bottom plug shall be fastened to prevent water from entering. The eye lens of gas respirator shall be scratch resistant and friction resistant to keep the vision clear. Anti poison respiratory products shall be used and kept by special personnel, and shall be cleaned and disinfected after use. During cleaning and disinfection, attention shall be paid to the temperature, and the rubber and other parts shall not be qualitatively damaged due to the influence of temperature.

Use method of disposable dust mask

First place the headband every 2-4cm, put your hand through the mask headband, and put the metal nose forward. Put on the mask and stick to the face, put the top of the mask on the head, then pull the head over the head, place it behind the neck, and adjust it to a comfortable position. Slowly press the fingertips of both hands along the metal strip of the bridge of the nose from the middle to both sides until they are close to the bridge of the nose. Try to cover the mask with both hands and conduct positive and negative pressure tests. (positive pressure test: cover the mask with both hands and exhale vigorously. If the air overflows from the edge of the mask, it is improper to wear it. Adjust the headband and nose bridge again.)