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