Class B2
CLASS B2 Inorganic gas and vapour filter
The B2 Filter combined with appropriate face piece provided with a threaded DIN Rd 40x 1/7" connector, is used for protection against inorganic compounds when the voulmetric concentration in the air does not exceed 0.5%.
Protective and utility feature
| FEATURE | Value permissible to EN-141 Std. | Test value obtained |
| Mass of filter / absorber (grams) | < 300 | 210 |
| Flow resistance (Pa): - continuous flow 30 dm³/min - continuous flow 95 dm³/min | < 140 < 560 | 80 300 |
| Minimal repture time (minutes) with concentration of 0.5% vol: - chloride - hydrogen sulphide - hydrogen cyanide | 20 40 25 | 25 > 63 30 |