Mocom SUPREME 17 - 1 st Vacuum Phase

Sterilizers SUPREME - FUTURA - CLASSIC (17-22-28)
- TECHNICAL MANUAL
EN
FUNCTIONING
17
4.3. 1st VACUUM PHASE
This phase represents the actual start of the sterilization cycle; with the activation of the vacuum pump it is possible
to reach the maximum level of vacuum inside the chamber at - 0.80 bar.
During the whole phase, the chamber tube bundle heating element and the generator heating element are activated
to allow for a correct management of the following steam generation.
The 1
st
VACUUM PHASE must ensure the maximum removal of air from the chamber; during the pressure decrease,
steam injections are carried out to achieve this result and improve the elimination of residual air.
Steam injections are managed automatically, based on the pressure value in the chamber, as follows:
SINGLE VACUUM CYCLE:
- injection activation
- injection end
> chamber pressure detection – 0.40
> chamber pressure detection – 0.20
FRACTIONATED VACUUM CYCLE:
- injection activation
- injection end
> chamber pressure detection – 0.70
> chamber pressure detection – 0.60
The sequence is repeated 3 times, with a subsequent pressure decrease until the vacuum level set at - 0.80 bar is
achieved; this value determines the start of the following phase - 1st PRESSURE RISE.
The control system allows managing any activation of the solenoid valve EV2 (air inlet) and a better operation of the
vacuum pump, in particular during the last phase of pressure decrease.
1
st
VACUUM PHASE - component activation status
STATUS
EV1
High drain
(N.O.)
EV2
Air inlet
(N.C.)
EV3
Low drain
(N.C.)
EV4
Drain
deflector
(3V)
EV5
Chamber
air inlet
(N.C.)
FAN
WATER
PUMP
- EV6
VACUUM
PUMP
CHAMBER TUBE
BUNDLE
HEATING ELEMENT
GENERATOR
HEATING ELEMENT
Vacuum
decrease
On
closed
Off
closed
On
open
On (1)
Off
closed
ON
OFF
ON
ON
ON
Steam
injection
Off
open
Off
closed
Off
closed
On (1)
Off
closed
ON
ON
ON
ON
ON