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B CLASSIC / B FUTURA / S CLASSIC - TECHNICAL MANUAL
FUNCTIONING
1.6 2nd PRESSURE RISE
This phase is similar to the 1
st
PRESSURE RISE, in that pressure rises back up to 1.00 bar from the negative value
reached during the vacuum pulse.
The sequence of vacuum pulses and pressure rise phases eliminates nearly all air left inside the sterilization chamber,
as well as any air contained in any hollow bodies or porous materials included in the load.
Eliminating air ensures optimal steam diffusion and equal temperature at all points of the load.
2
nd
PRESSURE RISE - components on state
STATE
EV1
Drain
High (NO)
EV2
Air inlet
(NC)
EV3
Drain Low
(NC)
EV4
Drain
bypass
(3V)
EV5
Air inlet to
chamber
(NC)
FAN
WATER
PUMP
VACUUM
PUMP
CHAMBER
BUNDLE HTR
GENERATOR
HTNG ELMT
Step 1
from -
0.80 to
0.00
Off
open
On
open
Off
closed
On (1)
Off
closed
ON ON OFF ON ON
Step 2
from 0.00
to 1.00
Off
open
Off
closed
Off
closed
Off (2)
Off
closed
ON ON OFF ON ON
After this phase, the 3rd VACUUM PHASE is carried out in the same mode used for the 2nd VACUUM PHASE.
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