Mestra 030420 Mode D'emploi page 7

PNEUMATIC POLYMERISING KETTLE
The Ref. 030420 is a practical stainless steel pneumatic
polymerising kettle, used mainly to polymerise dentures
and associated items in dentistry. To get the best per-
formance from the unit, use it as follows:
USING THE UNIT
1. Pour 3 or 4 litres of hot water (50-60 °C) into the
kettle.
Do not heat the polymerising water in the kettle,
especially with pressurised air in it.
2. Put in the dentures to be polymerised and close the
lid of the kettle, matching the thread on the top of the
kettle body to that on the lid and turning clockwise
until the handles meet. A slight click indicates that
the kettle is hermetically sealed.
3. Pull the ring on the end of the safety valve (A) and
check that the piston slides easily trough the inside of
the sleeve. If it sticks or is hard to move, do not use
the kettle. Consult your dealer.
4. Connect the connector (E) to a compressor outlet.
5. Fit the blower nozzle of the connector (E) to the air
inlet valve (B). During this operation, watch the nee-
dle of the pressure gauge (C). The optimum pressure
for polymerising is 1.5-2 atmospheres. A green strip
on the pressure gauge scale marks this area. Pressures
of more than 2 atmospheres are indicated in red.
Above 2 atmospheres the safety valve begins to lose
air, and it opens completely at between 2.3 and 2.6
atmospheres.
6. Polymerisation takes between 5 and 20 minutes, de-
pending on the type of resin used. After this time,
pull the ring at the end of the safety valve (A) to re-
lease the air inside the kettle.
7. Once all the air is removed, open the lid by sliding
the red bolt (D) on the handle towards the centre of
the kettle, and then turning the lid anticlockwise.
8. Remove the work pieces from the inside of the kettle.
PRECAUTIONS
▪
Read the
instructions in full.
▪ Never exceed a pressure of 2.5 atmospheres.
▪ Ensure that the air outlet used is properly protected
by at least one discharge valve. Consult your
installer.
▪ Do not use the kettle for anything except
polymerising (e.g. cooking).
▪ While cleaning the unit, never immerse the lid in
liquid.
▪ Each time the unit is used, check first that the safety
valve piston slides easily by gently pulling the ring.
▪ Do not heat the polymerising water in the kettle,
especially with pressurised air in it.
▪ Do not pour water into the kettle at more than 90 °C,
as this could damage the pressure gauge and other
components.
▪ Do not attempt to open the lid of the unit while there
is still pressure inside. Release pressurised air by
pulling the safety valve ring.
▪ If air leaks through the edges of the lid, replace the
rubber seal as soon as possible.
▪ Do not attempt to override the kettle's safety
measures.
▪ Do not allow children near the pressure cookers when
in use.
▪ Do not place the pressure cooker in proximity to a
source of heat.
▪ Extreme care should be exercised moving the unit
when it is pressurised. The handles and grips must be
used. Protect yourself where necessary.
▪ Never force the pressure cooker open. Do not open
until you are sure the pressure has been completely
released.
▪ Never use the pressure cooker without water.
▪ Keep these instructions.
MAINTENANCE AND CLEANING
▪ After each use, clean any residues of wax or resin off
the inside of the kettle with an ordinary detergent for
dishes. Clean the lid with a moist cloth.
▪ Replace the rubber seal in the lid regularly, using
original MESTRA spares.
▪
the lid, take care not to knock it,
While cleaning
especially around the pressure gauge and safety
valve.
▪
If the lid is very reluctant to turn or bad closing,
the rubber seal can be cleaned and slightly lubri-
cated with talcum powder.
▪ If the air inlet valve is
leaking, it may just
have come loose. Use
a tire valve wrench or
similar to tighten it.

EN
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