Средства индивидуальной защиты Hoffmann Group 2026 - страница 129

GBP 57 Pictograms: Silicone- R free All-round Configurable Adjustable Re-usable Silicone-free sealing lip nose clip headbands An important fundamental condition for breathing by humans is that at least 17 % oxygen by volume is present in the air. Oxygen concentrations less than this quickly lead to loss of consciousness, followed by death. Even when there is sufficient oxygen and normal breathing conditions, the lungs can be damaged by many different substances: Aerosols Gases and vapours Dust Gases is the collective term for finely divided solid fragments (particles) always fill the totality of the available suspended in gases, especially in the air. space completely and uniformly. Mists Vapours consist of finely distributed are gaseous materials which however at 20 °C droplets of liquid in the air. and 1 bar pressure are liquid or solid. Protection against particles Protection against gases, vapours and particles Disposable respirators Re-usable respirators Breathing support systems For short periods of use, For frequent use For wearing for long periods or frequent interchange of personnel. and for wearing for long periods. in demanding environments. Foldable Pre-formed Compressed air Half-face masks Full-face masks Powered air systems systems Filtering the Handy for carrying around due to Easy to use due to Sturdy mask body which Respirator Clean air supply ambient air without flat foldable mask body. pre-formed mask body. covers the mouth and with additional face if there is lack of oxygen respiratory resistance nose. protection. (oxygen content ≥ 17%) (oxygen content > 17%) Powered air support up to 3 kg / 3–5 kg without with with with Fittings: Combi- Combi- with exhalation valve exhalation valve P1/P2 P3/gas P1/P2 P3/gas full- half- Devices Devices nation nation hood or filter filter filter filter face face over 5 kg up to 5 kg filter filter helmet mask mask Duration of use function- 75 150 150 135 120 135 120 105 150/120 180/150 ∞/180 60 (in minutes): related Recovery time 30 30 30 30 30 30 30 30 30/30 30/30 –/30 30 10 (in minutes): Duration of use 360* 420 420 420 360 420 360 300 420/420 450/450 –/450 240* 420 per shift: *If the device is used for the maximum permissible period per shift, the device should not be worn on more than two consecutive working days and not more than four days per week. If respiratory protection is necessary against gases or vapours, the use of a half-face or full-face mask The correct filter class is determined by the concentration of particles present with the appropriate gas filter may provide a solution. Gas filters are selected according to the relevant in the ambient air. The critical value for this is the relevant “general dust limit substance group, and are applied to the body of the mask. If simultaneous protection against gases, value (AGSW)”. This is 1.25 mg/m³. If a specific limit value is specified for a vapours and particles is required, a combination filter must be used. Depending on their absorption substance, a multiple of this applies accordingly. capacity, gas filters are divided into different classes. The higher the class, the higher the pollutant concentration for which a filter can be used. 129