Replacement Of Threaded Connector; Replacement Of Speech Module; Replacement Of Exhalation Valve Assembly; Replacement Of Exhalation Valve For - Dpi Sekur SFERA Manuel D'utilisation Et D'entretien

attention to the three o-ring gaskets. In order to reassemble easily the visor, moisten the
rubber seal of the visor and the frame with water. For a correct positioning make reference to
the two small circles visible on the upper part of the visor. While reassembling the frame keep
in mind that the screws have to placed from the upper part of the frame.
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
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