Kuhn Rikon DUROMATIC Mode D'emploi page 86

10.2 Normal pressure reduction
10.3 Fast pressure reduction
Some models also have an automatic pressure reduction function.
10.4 Normal automatic pressure reduction
10.5 Rapid automatic pressure reduction
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Press lightly on the pressure indicator
stem until no more steam escapes.
Cool the rim of the cooker under tepid
running water (but wet the rim only
to prevent water from being sucked into
the cooker).
Lift the valve cap slightly and rotate
by 75° until it engages the first time
(stage 1).
Lift the valve cap slightly and rotate
by 90° until it engages the second time
(stage 2).