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ApplicationsThe design of screening equipment has,over theyears, argely been determinedbyexperience and the need to provide goodscreening capacity and effrciency whilstusing the smallest possible screeningsurface or area. Our standard range ofvibrat ing screens represents theculmination of many yearsof experiencein the handling of a wide range of bulkmaterials n a diverserange of industries.In addition o the standard angeof screensoutlined in this datasheet, here are alsomany special screenswhich have beendesigned and manufactured to suitcustomersspecial equirements.All the screensare designed o give a longworking life with minimal maintenanceandeasy eplacementofthe screendecks.Screening,extraction and separation areamongst some of the most i mportantfunctions n processingechnologyand canbe divided into severaldiscretecategories,and generallydefined as:-Coarsegrading - Where bulk materials aredivided into coarsegranulation angesandwhere in some casesextreme siz ingaccuracys not required-Fine grading - Normally associatedwithparticle sizes ess than 3mm down to 50microns and where a hig h degree ofaccuracy s required.De-dusting und the extraction ofundersizeparticles - The cleaning up ofbulk materials by the removal of particlesless than the granulation range which, inthemain, havebeencaused y degradation.Protective screening and the extraction ofoversize particles - The removal ofimpurities, oreign bodiesand umps whichgreatly exceed the required granulationrange.Separation - The removal of coarsematerial from fines.Dewatering - The recovery of solids froma washingmedia, usually water.Extraction - The removal of non solubleimpurities from washing water or carrierliquids.

Electromagnetic drive feeders and twin motor drive vibrating screensor handlinggranular fertiliser at a rate of 7 tonnes/hr

Twin deck electromagneticdrive vibrating screen,electromagneticdrive feeder andbuffer hopper or separation and sizing offood product.

APPLIEDVIBRATIONLIMITEDINDU STRIAL V BRATION EQU PM ENT

6,7 &8 SANDYWAYAMINGTON NDUSTRIIqL STATETAMWORTHSTAFFORDSHIRE877 4DSENGI.AND

Telephone: L827 2772Intemational: M L827 52172

Fax:0182751059International:+44 t827 51059

Designed by Enterprise Marketing Serui@s Limitedo and printed in England. (04i97) DataSheetVS/1 Page 1 Isue No 97ll

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Mode of OperationUnlike systemsusing circular or ellipticalmotion which have o be declined o imparta conveying component into the productbeing screened,our range of vibratingscreens have a predominately lineardisplacementwhich, due o its angle o thescreeningplane, imparts a conveyingcomponent nto theproduct. This not onlyallows this type of screen o be installedand operatedhorizontally, but also offersthe following significant advantages:-O High screeningcapacityI Practically no wear on the screening

deckI Excellent separationeffectI Minimal peggingandblindingI Shallow constructionConstructionThere are wo basic ypes of body designs.An openconstructionwhere the undersizeproduct discharges directly through thescreeningdeck nto eithera storagehopperor onto collection conveyor, and anenclosedconstructionwhere he undersizeproduct falls onto a conveying pan builtinto the screen structureand is conveyedand discharged hrough a spigottedoutleton the undersideofthe screen.The screen bodies are general lymanufactured n either carbon steel orstainlesssteel or a combination of both.They are designed to be l ight inconstruction while still possessing hestrengthand wear resistancenecessary ora long working life.Screeningdecks are suppliedaccording oth e requirements of each specificapplication from a wide variety ofconstructional esigns sing he wide rangeof proprietaryscreeningsurfaces unentlyavailable.Bolted or quick release dust tight coverscan be f i t ted where dust emissions,atmospheric pollut ion or productcontaminationare to be prevented.The complete range of screenscan bemanufactured in accordance with the

hygiene and egislative equirements f thefood andpharmaceutical ndustries.A range of equipment inishes are available,which includes spraying,powder coating,polishing ndbeadblasting.Drive UnitsThese are either vibrator motors orelectromagnetic ibrators,but as screeningperformance s greatly influenced by thedynamic characteristics an d controlparametersof the drive system, he choicebetween vibrator motors or electromagneticvibrator drive is very important. The meritsof both typesof drive systemsare givenbelow.Vibrator MotorsI Linear or elliptical displacement

dependingon the number of drives't) High output force/weight ratiol I wide range of fixed frequenciesI A wide range of amplitudesI Simple and nexpensiveconnection o

the mains electrical supplyBlectromagnetic VibratorsI Easy and steplessadjustmentof the

oscillation amplitudeI Accurate andrepeatablesettingof theoscillation amplitude

I ttre units have no rotating parts andthereforehave a long service ife withlittle or no maintenance

I Putt performance is virtuallyinstantaneouswhen switching on andstops in a fraction of a secondwhenswitchedoff

SuspensionMountsThese can take one of four forms, bondedrubber mounts, hollow rubber mounts,helical coil compressionspringsor helicalcoil tension springs. The type of mount isselected to suit the requirements of theinstallation and to provide a minimumisolation efficiency of 957o.

Totally enclosedelectromagneticdrivevibrating screenand eeder or the oodindustry. Fitted with quickly removeabledust tight covers.

Product PresentationIt is alwaysrecommended hat screensarefed with a sui tably designedelectromagneticdrive feeder as he outputcan be steplesslyadjusted. This ensuresthat the screendeck can be fed over itsentire width with a oose curtain of materialat an optimum flow rate, resulting inefficient screeningand even wear.Product TestingIt is not always possible o select he typeof screen best suited to a particularapplication from the description of thematerial and the performance criteriarequired. Therefore. in many casesoptimum sizing of equipmentcan only bedetermined by performing testson a sampleof material using our purpose built testunits.

VIBRATIONLIMITEDINDU STRIALV BRAT ON EQU PM ENT

6,7 &SSANDYWAYAMINGTON NDUSTRIALESTATETAMWORTHSTAFFORDSHIRE877 4DSENGTAND

Telephone: 182752772Intemational: M 182752L72

Fax 0182751059Intemational:+M 1827 5IO59

Designed by Enterprise Marketing Seruices Limitedo and printed in England. (04/97) Data Sheet VS/l Page 2 lsue No 9711