The five-fold safety of your Sicomatic
®
-D
40
The Sicomatic
®
-D you acquired is a technically fully deve-
loped appliance. It is the result of decades of experience
in the development and production of pressure cookers.
1. Working valve
If on the desired cooking level the foreseen pressure is
exceeded, the working valve (grey valve plug) at the top
of the lid handle opening opens up releasing excessive
steam and reducing any overpressure automatically.
2. Safety valve with automatic venting
a) Automatic venting function
The safety valve comprises two chambers (see fig. on
page 42), one beneath and one on top of the lid.
There is a metal ball in the lower chamber. When not
under pressure, this ball lies low enough to give the ven-
ting openings free and so the pot is still unsealed. While
the closed Sicomatic
®
-D is being heated up, superfluous
oxygen, which only spoils the flavour of the food, is auto-
matically expelled (automatic venting).
b) Function as a safety valve
If steam has built up to such an extent that due to the air-
flow the ball is pushed towards the sealing edge of the
lower chamber, the valve automatically seals. Beside the
working valve, this valve helps to increase safety.
In
normal use it is not triggered off, only when the
pressure continues to rise after the working valve failed.
If the metal ball is pushed into the upper chamber (see
fig. on page 42), the safety valve opens up and the pres-
sure decreases. A new pressure build-up is possible only
after the ball has been pushed back into the lower cham-
ber. Make sure not damage valve then (see page 36).
3. Safety slot
Only in case the working and the safety valve should fail,
there is this so-called „emergency exit“ on the lid rim. As
soon as excessive pressure has built up, the lid gasket is
being pushed out in such a way that steam is released.
4. Safety bolt
If lid and cooker handles are not aligned correctly with
each other, this red safety bolt on the lid handle prevents
any pressure build-up and steam is released.
5. Residual pressure valve
As soon as the slightest amount of pressure builds up,
the residual pressure valve rises (the pressure indica-
tor becomes visible). Not until the residual pressure
valve has disappeared completely inside the handle
can the pot be unlocked and opened, preventing any
risk of inadvertently opening the pot while it is under
pressure.
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