Replacement Of Exhalation Valve Assembly; Replacement Of Exhalation Valves For Negative Pressure Models Only; Replacement Of Inhalation Valve; C607 Twin Model Only - DPI Sekur C607 Serie Manuel D'utilisation Et D'entretien

properly replaced. Note that the threaded connector is complete of exhalation valve
assembly.

10.5 Replacement of exhalation valve assembly

Remove the inner mask from the housing of the exhalation valve assembly. Remove the
clamping ring without damaging the faceblank. Remove from the faceblank both valve
assemblies to be replaced. Make sure that the groove housing the valve is not dirty or
damaged and clean it, if necessary. Insert the new spare parts, connecting them carefully
to the inner half mask. Assemble again the clamping rings and tighten with a special tool
in order to insure a perfect leak tightness.

10.5.1 Replacement of exhalation valves for negative pressure models only

Remove the cap from the exhalation valve assembly. Remove the valve from the housing
pulling it with thumb and forefinger. Check that the valve holder and the housing are not
dirty or damaged, clean them, if necessary. Insert the valve-stem in the central hole of
the housing and pull it strongly from the inside of the faceblank until a click is heard.
Replace the cap.

10.6 Replacement of inhalation valve

10.6.1 C607 E, C607 SP/A, C607 CL3, C607 SELECTA, C607 SP/A ESA, C607
SP/A ATEX, C607 SP/A TP, C607 MD, C607 TP models
Remove the inner mask from the internal part of the full face. Hold with your thumb and
forefinger the valve and pull it so that the inhalation valve is free and can be easily
removed from the pin Assemble the new valve on the pin. Replace the inner mask. .
Check the black gasket on the inhalation valve threaded connector from the outside of
the faceblank, if it's worn-out or damaged, it must be replaced.
10.6.2 for C607 TWIN model only
Remove the yellow rubber disks on the filter connectors from the inside of the mask.
Place the new ones taking care that they are correctly positioned.

10.7 Replacement of Inner mask

Remove the inner mask from the internal part of the full face. Take the new inner mask,
complete with check valves, and insert the edge of the central hole in the internal groove
of the threaded connector. After checking the correct centred position of the inner mask
itself, insert the edge of the side holes in the grooves on the exhalation valve housings in
order to insure a perfect leak tightness.

10.8 Replacement of check valves

Remove both the check valve assemblies from the inner mask, and afterwards the valves
from their seats; check their integrity and that they are clean. If necessary clean or
replace. Assemble the valves on their seats first, checking the disk of the valves remains
flat. Afterwards replace the seats onto the inner mask paying attention that the rubber
stems of the valves are directed outwards the inner mask.
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