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Protection Type
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Protected Substances
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Breakthrough
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Required Duration
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Tested Duration
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A2 (Organic Gases)
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Boiling point ＞65℃ organic vapors (cyclohexane, toluene, gasoline)
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10ppm (cyclohexane)
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35min
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48-53min
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B2 (Inorganic Gases)
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Cl2, H2S, HCN
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Cl2=0.5ppm; H2S=10ppm; HCN=10ppm
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Cl2=20min; H2S=40min; HCN=25min
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Cl2=25-32min; H2S=46-＞70min; HCN=28-35min
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E2 (Acid Gases)
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SO2, hydrochloric acid vapor, HF
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5ppm (SO2)
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20min
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22-28min
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K2 (Ammonia/Derivatives)
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NH3, methylamine, ethylamine
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25ppm (NH3)
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40min
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45-52min
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Test Aerosol
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Max Penetration
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Measured Penetration
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Test Flow
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NaCl Aerosol
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0.05%
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0.0008%-0.003%
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95L/min
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Paraffin Oil Aerosol
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0.05%
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0.0007%-0.0038%
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95L/min
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Breathing Condition
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Flow Rate
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Inhalation Resistance
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Normal Breathing
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30L/min
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1.4-1.8mbar
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High Breathing
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95L/min
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5.7-6.6mbar
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Standard Type
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Details
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EU Standard
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EN 14387:2004 + A1:2008 (replaced by EN 14387:2021)
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Interface Standard
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EN 148-1 (latest: EN 148-1:2018)
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EU Regulation
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2016/425 (PPE Regulation)
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Chinese Standard
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GB 2890-2009
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Item
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Requirement
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Ambient Temperature
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0℃ – 60℃
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Relative Humidity
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20% – 95%
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Oxygen Concentration
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≥17% (volume); prohibited if lower
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Prohibition
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Unlisted hazardous gas environments
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Item
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Requirement
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Temperature
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-20℃ – 50℃
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Relative Humidity
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＜80%
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Storage Environment
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Cool, dry, ventilated; away from high temperature, fire, corrosives; no direct sunlight
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Shelf Life
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5 years (sealed original packaging); marked on label/packaging
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Industry/Scenario
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Protected Against
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Chemical Industry
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Organic/inorganic/acid gases, ammonia leaks
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Laboratories
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Harmful gases, dust from chemical experiments
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Construction
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Dust, sandy environments, decoration processes
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Machining
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Dust, fumes from machining operations
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