CERTIFICATES OF CONFORMITY

Filter classification

Type

Code Color

Main Applications

A

Brown

Organic gases and vapours with boiling point greater then 65 degrees ┬░C

B

Grey

Inorganic gases and vapours, e.g. chlorine, hydrogen sulphide, hydrogen cyanide, but not carbon monoxide

E

Yellow

Sulphur dioxide, hydrogen chloride and other acid gases

K

Green

Ammonia and organic ammonia derivatives

P

White

Particles, mist, fumes and dust

Filter Class

Max. permissiable concentration

1

2

3

1000 ppm (0,1 % by vol.)

5000 ppm (0,5 % by vol.)

10000 ppm (1,0 % by vol.)