LERICA C310 - Page 87

87
EN
USER
Rev. 03 - 07/2015 - Cod. 1501151 - Instruction manual for vacuum chamber packaging machines Mod. C254-C308-C312-C412-C420
6.3 NOTIONS REGARDING VACUUM CONTAINERS
Vacuumcontainersareusefulforpreservingproductsthatcanbeeasilycrushedaswellasforpreservingliquids.
Veryrigid,speciccontainersarerequiredforprofessionaluse,whicharemadeofstainlesssteelorglassof
anadequatethickness,whichcanwithstandahighlevelofvacuum.Theyhavespecialvalvesthatpreventthe
airfromenteringonceagainafterithasbeendrawnfromthecontainer.
Thecontainerisplaced,accordingtoitsdimensions,directlyinthevacuumchamberoroutsidethemachine,
whereaircanbedrawnbymeansofaspecialdeviceconsistingofasuctionpipeandtting.
Unlessspeciedotherwisebythemanufacturer,thevacuumcontainersarenottobestoredinafreezeror
refrigeratorattemperaturesbelow3°Castheycouldbedamagedduetothecombinationofextremelylow
temperaturesandmechanicalstressduetoahighvacuuminsidethecontainer.
6.4 NOTIONS REGARDING PRESERVATION OF VACUUM PACKED FOOD
Hereareafewfundamentalrulestobecompliedwithforperfectvacuumpreservation.
Donottrytousethesystemtopreserveproductsthatarealreadyalteredorpoorfromanutritionalpointof
view:lostqualityisnotrecovered
• Foodthatiskeptfortoolongatroomtemperatureorthathasjustbeenpreparedorcooked,loseshumidity
andinitialquality(colour,smell,taste,etc.)andismorepronetobacterialcontamination.-

Thisruleisfundamentalinvacuumpackingandisalsoveryimportantforthedurationofthevacuumpump:
productsthatarenotcool,letoffasignicantamountofmoistureintheformofwatervapourthatisdrawn,
therebycausingoxidationoftheinternalsurfacesofthepump.
• Food(raworcooked)mustbedistributedevenlyinsidethebagfortheairtoescapemoreeasily.Donotll
themexcessivelysoasnottocompromisethesealingofthebagandthehermetictightness.Itisgoodpractice
tollthebagsupto3/4oftheirvolume.
• Vegetablesandfruitmustbethoroughlydriedafterhavingwashedtheminordertopreventuidstagnation,
whichcouldmakethemlimp.
• Topreservemeatforareasonablylongtime,remembertocoolitinthefridgeforatleast2hoursinorder
toslowdownbacterialgrowth.Drythemeatbeforevacuumpackingittoobtainagoodpercentageofair
absence.Ifthemeatisonthebone(spareribs,porkchops,etc),coveritwithaluminiumfoiltopreventthe
bagfrombeingtorn.Certaintypesofmeat,suchaspoultry,arenotsuitableforvacuumpreservationasthey
naturallycontainanaerobicbacteriathatcouldproliferatemoreeasilyifthemeatisvacuumpacked.
• Fish:thismustrstbewashedwell;removethescales;evisceratebyremovingthegills;dryitandcoolitwelljust
likemeat,beforevacuumpacking.Preserveitintherefrigeratoratatemperaturethatdoesnotexceed+3°C.
• Hardcheese(Parmesan,Pecorino,etc.):noparticularprecautionisrequired,otherthanwrapthehardparts
thatcouldpuncturethebagwithaluminiumfoil.Softcheese:thegasoptionorvacuumcontainersshouldbe
usedtopreventthemfrombeingcrushed.
• Coldcuts:noparticularprecautionisrequired.
• Saucesmustbepasteurisedfor12minutes.Blastchillthemto3°Candthenpourtheproductintospecial
vacuum containers.
APPROXIMATE PRESERVATION TIMES
Thepreservationtimesprovidedarepurelyindicativeanddependontheinitialqualityoftheproducttobepre-
served,thetemperatureofpreservation,thecoolingtimeinthecaseofcookedfood,thetemperatureatwhich
theproducthasbeenpacked,thelevelofvacuumreachedandthequalityofthebagusedforvacuumpacking.
upto10days
upto15days
upto5days
upto10days