MSA 3S - Maintenance Intervals; Exhalation Valve Maintenance; Speech Diaphragm Replacement

3S Full Face Mask – Positive Pressure
14
Maintenance
GB
5.2 Maintenance Intervals
*)
For a 2-year interval cleaned and disinfected masks have to be stored airtight. Otherwise masks
should be cleaned and disinfected at least semi-annually. After each cleaning and disinfection the
facepiece must be checked.
**)
For airtightly packed facepieces, which are not exposed to increased climatic and mechanical stress
[for example transport on vehicles], this interval can be extended to 2 years.
***)
Only applicable for PS and PS-ESA
5.3 Maintenance of the Exhalation Valve
In case of a leak remove the exhalation valve disc and replace it with a new one as follows:
(1) Unscrew the threaded socket from the mask inside with the special tool.
(2) Remove the exhalation valve disc or the complete exhalation valve assembly.
(3) Replace the defective components.
(4) Reassemble the parts in reverse order.
(5) Perform a tightness test [ chapter 5.5].
5.4 Replacing the Speech Diaphragm
(1) Unbutton the nose cup.
(2) Unscrew the threaded socket from the mask inside with the special tool.
(3) Remove the speech diaphragm.
(4) Assemble the new speech diaphragm with the gasket towards the connector.
(5) Perform a tightness test [ chapter 5.5].
Work to be
Performed
Maximal Intervals
Before use After Use 6-monthly
Two
years
Four
years
Six
years
Cleaning and Disin-
fection
*)
XX
*)
Visual, Functional
and Tightness
Check
**)
XX
**)
Replacement of the
exhalation valve
disc
X
Replacement of the
Speech Diaphragm
X
Replacement of the
O-ring for connector
XX
***)
User check X
The year of manufacture is located on the valve disc.
The year of manufacture is located on the speech diaphragm.