Replacing The Suit Valves; Tightness Test Of The Valves - MSA Vautex Elite S Operating Manual

MAINTENANCE
5.3.

Replacing the Suit Valves

3
2
1
Suit Valve
Fig 2
1 Ring nut
2 Slip ring
3 Gasket
Removing the suit valves
(1) Pull off the angled prechamber of the valve to be removed.
(2) Open the suit and lay out the inside to allow access to the valve.
(3) Use one hand to grip the valve housing from the outside and the other to unscrew the ring
nut from the valve housing inwards using a valve spanner.
Reassembling the suit valves
(1) Insert the ring nut with the slip ring correctly fitted from inside through the head strap hole,
the gasket opening and the valve hole on the suit shell.
(2) Screw the valve housing onto the ring nut from the outside.
(3) Use one hand to grip the valve housing from the outside and the other to screw on the ring
nut from the inside to the valve housing using a valve spanner.
The torque must be 250 Ncm.
(4) Fit the valve disc
(5) Mount the prechamber by overstretching whereby the angled part is pointing in the
direction of the boot.
5.4.

Tightness Test of the Valves

After each use and cleaning / disinfection and after each maintenance / repair task or every half-
year, a tightness test of the suit valves must be carried out. The tightness of the suit valves is to
be checked using e.g. the MSA valve leak test adapter in connection with the compensation
container and the mask tightness test instrument ( Section 8):
 create a negative pressure of 10 mbar.
 max. pressure change within one minute must not exceed 1 mbar.
If a leak is detected, either the valve disc or the entire suit valve assembly must be replaced
( Section 5.3).
The valve discs and gaskets must be replaced every two years ( Section 5.1).
16
6
5
4
4
5
6
Vautex Elite S
Valve housing
Valve disc
Prechamber
MSA
GB