5
Replacing the exhalation valve
• Pull the valve cover from the valve and remove the disc.
• Insert a new disc ensuring that it lies flat on the seat.
• Align the valve cover with the slots and snap it in its place.
Replacing the pivot arms
• Use side clip to release pivot arm and withdraw arm from pivot post. Slide new pivot arm into
pivot post and secure with side clip.
Replacing the brim trim
• Release the elastic loops from the head harness. Untie the retaining cord of the old brim trim and
remove it from the helmet.
• Locate the rectangular slots in the new brim trim over the airducts at the front of the helmet,
arrange the brim trim around the brim of the helmet with the sponge pads tucked under the
helmet brim. Tie the retaining cord.
Replacing the head harness
• Tilt the visor to the fully-up position. By using both thumbs, press down on the white retaining tabs
to release the head harness from the helmet.
• When mounting, insert the white retaining tabs into the slots in the rim of the helmet, and press
down until they clik into place.
• Tilt the visor to the required position.
Replacing the sweatband
• Pull the old sweatband from the head harness hooks.
• Fit the new sweatband onto the four hooks in the lower front of the headband, fold across the
headband, then clip on to the two hooks at the top of the headband.
5. Selection of blower-assisted breathing protector equipped with filter
See Instructions for Use of the blower device to be used.
APF
(Assigned protection factor)
T
ype of protective device
Values as given
in BS 4275 Values as given
in German BGR
190 - ZH1/701
Remarks, limitations
Power-assisted face shield with
particle filter
TH1P
TH2P (Flowhood 5)
TH3P
10
20
40
5
20
100
“Open” facepieces, such as helmets
or hoods, do not provide sufficient
protection in case of breakdown or
inferior output of the blower.
Therefore, devices of class TH1 must
never be used against carcinogenic,
very poisonous or radioactive gases
and vapours.
Device with combined filter The specified multiples of threshold value for the gas or particle filters are
given separately, but in all cases the lowest value applies.
Power-assisted face shield with
gas filter *)
TH1 gas filter class 1 or 2
TH2 gas filter class 1 or 2
TH3 gas filter class 1 or 2
10
20
40
5
20
100
For devices with combined filter apply
the relevant limitations of gas and
particle filters.
*) Provided that the maximum permissible detrimental gas concentration for the gas filter is not exceeded. For
power-assisted filtering devices with gas filter, concentration must not exceed 0.05 vol.% in gas filter class 1
and 0.1 vol.% in gas filter class 2 and 0.5 vol.% in gas filter class 3.