- Prolongs the life of filters
- Suitable for SR900 masks
- Supplied in packs of 5
These pre-filters extend the life of Sundström gas filters. The SR221 pre-filter ensures that the main filter will not be prematurely clogged by large particles. The pre-filter is easily installed in the pre-filter holder. See the schematic picture of all parts.
Explanation of photo (the pre-filter is part J):
A. Mask body
B. Filter attachment
D. Valve for exhalation membrane
E. Exhalation membrane
F. Valve for inhalation membrane
G. Inhalation membrane
H. Protective cap
K. Pre-filter holder
We recommend to replace the pre-filter regularly (daily in case of daily use). The Sundström SR 221 (pre-filter) is suitable for Sundström SR 900 face masks and the corresponding gas filters.
Package contents: 5 filters
Thickness: 1 mm
Diameter: 102 mm
Weight: 1.1 grams
Pressure drop: 2 Pa (at 30 l/min)
Approved: CE Category I
Suitable face mask: Sundström SR900
We have a number of recommendations for working safely with polymers. At Polyestershoppen you will not only find the polymers themselves, but you can also purchase all the protective equipment you need from us. If you have any doubts or questions, please contact our customer service. We can give you advice on how to work safely with polymers.