“GB2890-2009
KN90 half-mask gas mask can replace KN95 filter cotton
Rubber-plastic mask + activated carbon filter box
Protective objects, dust, organic gas, toxic gas, benzene and ketone series, gasoline, acetone, carbon dioxide, ether, etc.
Applicable to paint mixing, painting, industry, chemical industry, factory, coal mine, dust and smoke prevention operations.
a) Half-mask gas mask should meet the requirements of GB2890-2009;
b) Half-mask exhalation valve air tightness: when the exhalation valve is depressurized to -1180 Pa, the time for the half-mask exhalation valve to return to normal pressure is not less than 20s;
c) Half-mask leakage rate is not more than 2%;
d) The field of view below is not less than 35 degrees;
e) Mask inhalation resistance is not more than 20Pa; exhalation resistance is not more than 50Pa;
f) Headband strength: It should be able to withstand a tensile force of 50N for 10s without breaking;”
Safety protection equipment
