DuPont Tychem TK Instrucciones De Uso página 24

5. As the material stretches the pressure will drop. For 10 min-
utes keep adding sufficient air to keep the liquid in the Yellow
area (1750 ± 50) Pa. After 10 minutes adjust the fluid level to
the top of the Green area (1650 ± 50) Pa. Allow a further 6 min-
utes to elapse and record the drop in pascals. The pressure
drop must not exceed 300 Pa to comply with EN 943-1:2002 for
gas-tight suits.
Note
Gas-tight suits that have a non-return
valve fitted to the swivelling pass-thru
must be inflated and tested through one
of the exhalation valves by carrying out
the following procedure.
1. Using a 2 mm hexagon key loosen the
screw from the center of the exhalation
valve and remove the cap.
2. Carefully stretch the diaphragm over
the center spigot to remove from the
exhalation valve body.
3. Push the inflation & test plug into the
exhalation valve body until sealed (see
Figure 17).
4. Connect the inflation hose from the test
rig onto the coupling fitted to the plug.
5. Now carry out test procedures as pre-
viously described.
6. After completing the test remove the
inflation hose from the inflation & test
plug.
7. Remove the inflation & test plug from
the exhalation valve and any other
plugs that may have been fitted.
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8. Carefully stretch the diaphragm over
the center spigot making sure that it is
correctly orientated and that the hole in
the diaphragm is located under the
shoulder of the spigot.
9. Replace the exhalation valve cap
making sure that the location channel
on the cap is located over the location
key on the exhalation valve body (the
lettering should be at the top).
10. Replace the center screw and hand
tighten using a 2 mm hexagon key.
If you are performing leak-tightness
tests using the electrically operated
automatic test unit please refer to the
instructions supplied with the unit.
If you currently use a manual test
rig but are interested in purchasing an
automatic test unit please contact our
customer services department: Ph.:
(00352) 3666 5742