Replacement Of Threaded Connector; Replacement Of Speech Module; Replacement Of Exhalation Valve Assembly; Replacement Of Inhalation Valve - SEKUR SFERA Serie Mode D'emploi

Check that all parts, particularly the gaskets, are correctly assembled. Make sure that the inner mask is
correctly positioned on the exhalation valve and of to the tightening the sealing elements.

10.2. Replacement of threaded connector

Disconnect the inner mask from the seat of the exhalation valve assembly. Remove the protective grid from
the threaded connector, use the disassembling tool to unscrew the exhalation valve assembly from the
outside of the mask (following the direction indicated by the arrow), paying attention to the gasket. At this
point the threaded input connector can be removed by rotating it approximately 45 degrees. Before
assembling, make a visual check of the component parts, particularly checking the gasket. Replace the
damaged or worn component parts with original spare parts. Clean the component parts if necessary.
Reassemble the components in inverse order. Make sure that the gasket and the inner mask are correctly
assembled on the exhalation valve assembly and tightened.

10.3. Replacement of speech module

Use a compass spanner, easily commercially available, to unscrew the locking ring (inside the mask) of the
speech module and pull the speech diaphragm and its gasket out of the seat. Check that the components are
not dirty and, if necessary, clean them. Assemble the spare parts in the following order: Gasket - Speech
module (with the date towards the inside of the mask). Tighten the locking ring of the speech diaphragm
appropriately.

10.4. Replacement of exhalation valve assembly

Remove the protective grid from the threaded connector, thus having access from outside to the exhalation
valve assembly. Disconnect the inner mask from the seat of the exhalation valve assembly. Use the
disassembling tool to unscrew the exhalation valve assembly from the outside of the mask (following the
direction indicated by arrow) paying attention to the gasket. Check the seal of the exhalation valve assembly
seat and the inner mask seal. Make sure that the gasket and the face seals are not dirty and, if necessary,
clean them. Put the grid back.
10.4.1. Replacement of exhalation valve for SFERA and SFERA SIL only
Remove the protective grid from the threaded connector, thus having access from outside to the exhalation
valve assembly. Pull the rubber valve out of its seat with your thumb and index fingers. Make sure that the
valve housing and seat are not dirty or damaged and, if necessary, clean or replace them. Insert the valve-
stem in the central hole of the seat and pull it strongly from the inside of the facepiece until a click is heard.
Put the grid back.

10.5. Replacement of inhalation valve

Unscrew the external cap on the speech module with the disassembling tool and remove carefully the inner
mask from the exhalation valve housing. Remove the inhalation valve from its seat and make sure the
inhalation valve assembly is not dirty or damaged. Replace the spare part on the valve seat, from the inside
of the mask, check that the inhalation valve has been correctly positioned. Replace the inner mask and make
sure that it has been correctly positioned around the housing of the exhalation valve assembly (make a visual
check through the visor from outside). Check that speech module gasket and the visor seal are not damaged
or dirty and, if necessary, clean or replace the damaged parts. Insert the threaded connection of the speech
diaphragm through the hole of the visor and screw the cap by using the disassembling tool.

10.6. Replacement of inner mask

Remove the speech module as described in paragraph 10.3, check that it is clean and not damaged and apart
it together with the o-ring and the threaded locking ring. Unscrew the external cap on the speech module
with the disassembling tool and remove carefully the inner mask including the speech module from the
exhalation valve housing. Check that the groove of the exhalation valve assembly is not dirty or damaged. If
necessary, clean or replace the damaged or worn parts. Secure the inner mask on the exhalation valve
assembly and check that it has been correctly positioned, through the visor. Make sure that the speech
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