Selecta 4002429 - Introduction to the Autoclave; Temperature Control System

MANUAL DE INSTRUCCIONES CODIGO 80342 REV O 11/2021 Pag.: 35
J.P. SELECTA s.a.u. Autovía A-2 Km 585.1 Abrera 08630 (Barcelona) España Tel 34 937 700 877 Fax 34 937 702 362
e-mail: selecta@jpselecta.es - website: http://www.grupo-selecta.com
4. Introduction
The “STERIL-FOOD” autoclave has been designed to perform thermal treatments
of pasteurization or sterilization of containers (metal, glass, plastic) with food
content. The autoclave has the capacity to store 10 heat treatment programs
with 6 steps each.
All programs can be programmed by the user.
The autoclave works by spraying superheated water to transmit the heat (tem-
perature) on the containers subjected to heat treatment (except 20L model that
works by steam)
4.1 Temperature control
The autoclave uses two temperature probes:
•Watertemperatureprobe:
It indicates the water temperature of the autoclave. Located at the bottom of
the autoclave.
•Producttemperatureor“heart”probe:
Indicates the temperature of the product.
The F
0
value is calculated by the autoclave software from the temperature recorded
by the heart probe inserted in a container and the thermoresistance characteristics
of four types of microorganism according to the thermal treatment to which the
product is subjected:
In case of a sterilization process: Clostridium Botulinum; in case of pasteurization:
Bacillus coagulans, Streptococcus faecalis D or user denable.
The F
0
value is therefore subjected to time and temperature to which the products
are submitted during the respective thermal treatment (above 100ºC in sterilization
processes and above 67ºC and 55ºC respectively in pasteurization processes).
Product probe
also called «Heart probe»
cloSiNg pRobe
jaR lid
pRodUct
heaRt pRobe
caN
Fig 1. Temperature prole.
T
a
FINAL
T
a
Maintenance
P
Contrapressure
(bar)
(ºC)
(ºC)
(minutes)
HEATING MAINTENANCE COOLING DE-PRESSPRE-HEA-
TING-
Temperature
Pressure