Regada ST 1-Ex Manual

Explosion-proofelectriclinearthrust
actuatorsST1-Ex
INSTALLATION,SERVICEAND
MAINTENANCEINSTRUCTIONS
74072407

1026

TESTCERTIFICATE
COMPLETENESS CERTIFICATE
INSTALLATIONCERTIFICATE
EXPLOSION-PROOFELECTRICLINEAR THRUSTACTUATORST 1-Ex
Type number411............................................. Powersupply..........................................V .............Hz
Serialnumber................................................. Set switch-off thrust......................................................N
Production year............................................... Operating speed.................................................mm/min
Wiring diagram................................................ Operating stroke........................................................mm
....................................................................... Transmitter.......................................................................
Warrantyperiod ..................................months Inputoperating signal......................................................
Serialnumberofelectricmotor...........................................................................................................................
Serialnumberoftransmitter...............................................................................................................................
Serialnumberofcontroller..................................................................................................................................
Explosion-proofversion: c Ex db ebIIB T6Gb and Ex tb IIIC T85°C Db
Finalreport No.:FTZÚ 03 ATEX0273X
Designand type testsarein accordance with the followingstandards:
EN 60 079-0–Electrical apparatusfor explosivegasatmospheres–Part0: General requirement
EN 60 079-1–Electrical apparatusfor explosivegasatmospheres–Part1: Flameproof enclosures“d”
EN 60 079-7–ExplosiveatmospheresPart 7: Equipment protection byincreased safety“e”
EN/IEC 60 079-31: Explosiveatmospheres–Part 31: Equipment dust inition protectionbyenclosure„t“.
Testsmade in accordance with TP74 0905 00
Testsmade by....................................................................................................................................................
Date ................................................................ Signature and stamp......................................................
Used valve.........................................................................................................................................................
Assembled by:Firm...........................................................................................................................................
Name...........................................................................................................................................
Warrantyperiod ................................months
Date .............................................................. Signature and stamp.......................................................
Location ............................................................................................................................................................
Installedby: Firm..............................................................................................................................................
Name..............................................................................................................................................
Warrantyperiod.................................months
Date .............................................................. Signature and stamp.......................................................
II 2G II 2D

Please read these instructionscarefullybeforemounting and operating the actuator!
Contents
1. Generaldata......................................................................................................................................................2
1.1 Purposeand applications............................................................................................................................2
1.2 Safetyinstructions.......................................................................................................................................2
1.3 Productinfluence to environment................................................................................................................2
1.4 Data specified on electricactuator..............................................................................................................3
1.5 Terminology.................................................................................................................................................4
1.6 Instructionsforstuff training........................................................................................................................5
1.7 Warning forsafetyuse................................................................................................................................5
1.8 Warrantyconditions.....................................................................................................................................5
1.9 Under-guarantee and after-guaranteeservice............................................................................................5
1.10 Operation conditions...................................................................................................................................6
1.11 Packing, transport, storing and unpacking..................................................................................................7
1.12 Appreciation ofthe productand packing.....................................................................................................8
2. Description, function and specifications............................................................................................................8
2.1 Description and function..............................................................................................................................8
2.2 Basicspecifications.....................................................................................................................................9
3. Installationand dismantlingofactuator...........................................................................................................12
3.1 Mechanicalconnection..............................................................................................................................12
3.2 Electricconnectionand checking offunction............................................................................................13
3.3 Dismantling................................................................................................................................................15
4. Adjusting ofactuator........................................................................................................................................15
4.1 Gearunit adjustment.................................................................................................................................16
4.2 Adjustment ofposition-indicating unit (Fig.4)............................................................................................16
4.3 Adjustment ofresistant transmitter(Fig. 5)...............................................................................................16
4.4 Adjustment ofthe Electronic Position Transmitter(EPV)-the ResistiveTransmitter(Potentiometer) with
the ConverterPTK1............................................................................................................................................17
4.5 Adjustment ofthe Capacitive TransmitterCPT1/A(Fig.8)........................................................................18
4.6 Adjustment ofposition controller(Fig. 9)...................................................................................................19
5. Service, maintenanceand troubleshooting.....................................................................................................21
5.1 Service.......................................................................................................................................................21
5.2 Maintenance -extent and periodicity........................................................................................................21
5.3 Maintenanceto assureinexplosiveness...................................................................................................22
5.4 Troubleshooting.........................................................................................................................................23
6. Accessories.....................................................................................................................................................23
7. Enclosures.......................................................................................................................................................24
7.1 Wiring diagrams.........................................................................................................................................24
7.2 Dimensionaldrawings...............................................................................................................................28
7.3 List ofcontractualafter-salesservice centres...........................................................................................29
Edition: 03/2019
The rightofchangesreserved! Ev. Nr.:74 0724 07

2 ST1-Ex
The Installation, ServiceandMaintenance Instructionsare drawn upaccording to requirementsof ECExecutive
Nr. 89/392/EEC "Uniform requirementsformachinesand devicesfrom the point of viewof safetyand health
care", to save lifeand health of users and to avoidmaterialdamagesand exposure environment to danger.
1.Generaldata
1.1Purpose andapplications
Explosion-proofelectriclinearactuators (hereinafterEA)types ST1-Ex resp.EA withcontrollertypes
arehigh-powered electric-mechanicalproducts,designedfordirectinstallationsontocontrolleddevices
(regulatingbodies-valves,etc.).EAof ST1-Ex typesareprovided forremote controlofclosingbodies,andEA
with controllerforautomotivecontrolofregulating bodiesinbothdirectionsoftheirmovement. Theycanbe
equipped withmeansofmeasuring andcontroloftechnologicalprocesseswhereanunifiedanaloguedirect
current orvoltagesignalis an information bearerontheirinputand/oroutput.Theycan be usedinheating,
energy,gas,air-conditioning and othertechnologicalsystems,whichtheyaresuitablefor,regardingtheir
features.Theyareconnected with controlleddeviceswith aflange accordingto, EN 15714-2 orusing pillars
and flanges.
1. Donot count with tight closing performedby control signalsof EAST1-Exwith controller.
2. Itis forbiddento use EA as a lifting mechanism!
3. Switching of actuatorbya semiconductorswitches haveto be consultedwith producer.
1.2Safetyinstructions
Product characteristics fromrisk point of view
EA typeST1-Exisbased oncharacteristics statedinpart„Operatingconditions“ and fromthe riskpoint of
viewthereservedtechnicaldevice with highrisk, whileitiselectricdeviceofAgroup (see RegulationofMPSvR
SR no. 508/2009 Statute, §2 and Attachment no. l, III. part, section A– valid forterritoryofSR).
EA are according to EN 61010-1:2010 dedicated to installation category(overload category)II.
In orderto demonstrate thecompliancewiththe requirementsofthe EuropeanCouncildirectiveon machinery
2006/42/EC,European Parliament andCouncil Directive 2014/34/EÚ on equipment and protectivesystems
intendedforuseinpotentiallyexplosiveenvironment (designated asDirectiveATEX100a),directiveofthe
Council2014/35/EUon LVDand Council Directive2014/30/EUonEMC, the electricactuators aresubjectto
certification byauthorized certification facilities.
The productmeetsthe essentialsafetyrequirementsaccordingtoEN 60204-1and isincompliance with
EN 55011/A1withinvalidedition.
1.3Productinfluencetoenvironment
Electromagneticcompatibility(EMC): the productcomplieswiththe requirementsoftheDirective2014/30/EU
ofthe European Parliamentandofthe Councilon theapproximation ofthelawsthe MemberStatesrelating to
the electromagneticcompatibilityandwiththerequirementsofstandardsaswellEN/IEC61000-6-4+A1, EN/IEC
61000-6-2, EN/IEC61000-3-2 and EN/IEC 61000-3-3withinvalid edition.
Vibrations causedbythe product: productinfluenceisnegligible.
Noise producedbytheproduct: The maximumallowablenoicelevel(A)ofthe productmeasured inaplaceof
operation is80dB(A).
Electricactuators are made inexplosion-proofversion cExdb eb II BT6Gb and
Extb IIIC T85°C Db, pursuant to:
EN/IEC 60079-0: Explosiveatmospheres– Part 0 : Equipment generalrequirements– Generalrequirements
EN/IEC 60079-1: Explosiveatmospheres– Part 1 : Equipment protection byflameproofenclosures“d”
EN/IEC 60079-7: Explosive atmospheres-Part7: Equipment protection byincreased safety"e".
EN/IEC 60079-31:Explosive atmospheres– Part 31: Equipment dust initionprotectionbyenclosure „t“,within
validedition.
ElectricpartsEA areproposed:
- as devices ofthe group II for othersthreatened areas (excluding mines)
- ofthe category 2 withdemanding requirementsforsafety
- for use max. inzone 1
- for atmospheres G (gases, vaporsor mists) or D (combustibleconductivedusts)
- topressurerange from0.8to1.1bar.
II 2G II 2D

ST1-Ex 3
Designversion is:
- flameproofenclosures“d“, increased safety “e” orleveldustignitionprotection byenclosure “tb”
-with explosionprotectiongroup IIB or IIIC
-and temperature class T6 (max. permissible surface temperature +85°C.
Zonesforinstallation ofexplosion-proofelectricactuators and conditionsforequipment installation are defined in
the following standards:
IEC/ EN60079-10: Electricalapparatusforexplosivegasatmospheres
Part 10: Classification ofhazardousareas
IEC/ EN60079-14: Electricalapparatusforexplosivegasatmospheres
Part 14: Electricalinstallationsinhazardousareas
Non-electricpartsofelectric actuators aredesigned, engineered, manufactured, tested and identifiedin
compliancewith the requirementsforsafetyofmachineryaccording to the following standards:
EN 1127-1: Explosive atmospheres– Explosion prevention and protection
Part 1: Basicconceptsand methodology
EN 13463-1: Non –electricalequipment potentiallyexplosive atmospheres
Part 1: Basicmethod and requirements
EN 13463-5: Non –electricalequipment potentiallyexplosive atmospheres
Part 5: Protection byconstructionalsafety“c”
Equipment identification consistsofthe following characters:
Ex -electricequipment complieswith standard EN/IEC 60 079-0.and related standardsforthe corresponding
typesofexplosion protection.
d -identification ofthe explosion protectiontype -"flameproofenclosure"accordingto EN/IEC 60079-1.
e-identification ofthe explosion protection type – „increased safety"according to EN/IEC 60 079-7.
tb -identification ofdust ignition protection byenclosure„t“according toEN/IEC 60079-31.
II orIII -identification ofthe class ofnon-explosive electricdeviceaccording tothestandard EN/IEC60 079-0.
B or C-identification ofthe sub-class II orIII ofnon-explosiveelectricdevicesaccording to the standardEN/IEC
60 079-0.
T6 orT85°C -identificationofthe temperature class ofnon-explosive electricdevice class II orIII accordingto
the EN/IEC 60 079-0.
Gb -(EPL Gb)-identification oftheequipment designated forexplosivegaseousatmospheres, with "high"level
ofprotection, whichisnotasource ofinitiation in standard operation orincase ofexpected failures.
Db - (EPLDb) - identificationofthe equipment designated forexplosive dustatmospheres, having a “high”
levelofprotection, which isnot asource o ignitioninnormaloperation orduring expected malfuctions.
1.4Dataspecifiedon electricactuator
NameplateforWarningplate:
Nameplate containsthe basicdata concerning identification, performance and electricity:indication ofproducer,
type, serialnumber,max. load thrust and switching-off thrust, operatingspeed, protection code, operating stroke,
supplyvoltage and current.
Warninglabel:
-with identification ofthe waitingtime and requirementsforstrength ofscrews.

4 ST1-Ex
Non-explosive label: identifying the manufacturer, certificate number, typeidentification, versionidentification,
serialnumberand version forambient temperature:from-25°C upto +55°Corfrom-50°C upto +40°Cor–from
50°Cup to+55°C orfrom-60°Cup to+40°C
Graphicsymbolson electricactuator
The graphicsymbolsused on electricactuator substitutethe text messages. Someofthemareinaccordance
withENISO 7010, ISO 7000 and IEC60417withinvalidedition.
Dangerous voltage (EN ISO 7010-W012)
Strokeofthe electriclinear actuator
Switching-offthrust
Manualcontrol(0096 ISO 7000)
Protection terminal(5019 IEC 60417)
1.5Terminology
Potentially explosive environment -an environment where explosive atmosphere can occur.
Explosivegasatmosphere -amixtureofflammablesubstances(informofgases,vapors ormist)with air
underatmosphericconditions,whichupon initiationenablesthe propagation ofthe combustion inunconsumed
mixture.
Maximum surfacetemperature -maximumtemperatureoccurringduring operationinmostadverseconditions
(but within accepted tolerance limits) at anypart ofthe surface ofthe electricdevice,
that couldresultinignitionofthe surrounding atmosphere.
Enclosure -allwalls,doors,covers,cableglands,shafts,rods,drawbars,etc.,thatcontributetothelevelof
protection against explosion orto the levelofprotection (IP)oftheelectricdevice.
Flameproof enclosure"d"-typeofprotection whereinthepartscapableofignitinganexplosiveatmosphere
arelocated withinthe enclosure, incaseofexplosion ofan explosivemixturewithinthe enclosure,such
enclosurewillwithstand the pressureoftheexplosion andprevent the propagationofexplosionto the
surrounding atmosphere.
Increasedsafety“e” -type ofprotectionappliedtoelectricalapparatusinwhichadditionalmeasuresare
appliedsoastogiveincreased securityagainstthepossibilityofexcessivetemperaturesand ofthe occurrence
ofarcs and sparksin normalserviceorunderspecified abnormalconditions.
Dustignition protection byenclosure“t” –type ofprotection forexplosivedustatmosphereswhereelectrical
equipment isprovided withan enclosureproviding dustingress protection and ameansto limitsurface
temperatures.
Combustible dust -finelydivided solid particles,500 morless innominalsize,which maybe suspended
in air, maysettle out ofthe atmosphere undertheirown weight, mayburnorglowin air, and mayform
explosivemixtureswith airat atmosphericpressure and normaltemperatures´.
Conductive dust-combustible dustwith electricalresistivityequalto orless than 103Ω· m.
Combustible flyings -solid particles,including fibres,greaterthan 500 min nominalsizewhich may
be suspended in airand could settle out ofthe atmosphere undertheirown weight.

ST1-Ex 5
!
1.6Instructionsfor stuff training
Requirementsforspecializedskillsof personsperformingassembly, operation and maintenance
Electric connection can beperformed onlybyan acquaintedperson, i.e. an electricalengineerwith
professionaleducationofelectricalengineering atan apprenticeschooloratechnicalschool
(secondary,complete secondary oruniversityeducation)and whosequalificationwasverifiedbyan
educationalfacilityauthorised toverifyprofessionalqualification.
Servicecan beperformed onlybyworkers professionallyqualified and trainedbythe produceror
contracted service centre!
1.7Warning for safetyuse
Productsareassignedforoperationinenvironment consistofgas,steamand vapours,withtemperaturerange
from–25°Cupto+55°C; and specialversionforultralowtemperaturesfrom–50°Cupto+40°C,
from-50°Cupto +55°Corfrom-60°Cupto+40°C, topressurerangefrom0.8 to 1.1bar.EAcanbe
installed atareasspecified max. aszone 1.
It matters about followingproductsare designated forenviroment:
-group II
-the category 2
-fortype ofthe atmospheres G or D
-subgroup B
-temperature class T6.
1. Productsaredesigned accordingto standardsforelectricalandnon-electricaldevicesassignedforareas
with dangerofexplosion:
-forelectricparts:EN/IEC 60079-0, EN/IEC 60079-1 and EN/IEC 60079-7 and EN/IEC60079-31.
-fornon-electricparts:EN 1127-1 ,EN13463-1and EN 13463-5.
2. The maximumsurface temperatureofthe actuatorforgiven group T6 isnot allowed toexceed +85°C.
3. Ifthe actuatorisplacedondevicewhichregulate mediumwith highertemperaturethan +55°C, protectthe
actuatorbyadditionalconstruction inorderto maintainambient temperaturemax.+55°Cand alsoto stop
temperature transmitting through junction component!
4. Cableglandsblindsareassigned onlyfortransportand storageperiod, i.e. forperiod tillthe actuatoris
builded into operation with dangerofexplosion, than blindsmust be replacebyconnecting cable.
5. Ifanyofthecable glandsare not used to installacable, it must be replacedwith certified Explug ofthe
approved type,secured with Loctite 243 adhesive.
6. Temperature on entrycablesismax. 90°C.
7. ATTENTION:THE COVER CANBEREMOVED 30 MIN.AFTERPOWER SUPPLYIS
SWITCHED OFF!USE SCREWSWITHATENSILE STRENGTH 800 N/mm2.
8. WARNING– POTENTIALELECTROSTATIC CHARGINGHAZARD.
During operation ofEA it must be prevented anyprocess with intensive formation ofelectrostaticcharge
strongerthan manualfriction ofhissurface.
Productprotection
EAdoesnothaveown short-circuitprotection, thereforetheremustbe included suitableprotective device
intothesupplypower(circuit breaker, orfuse), which servesatthesame time asmain switch.
Typeof equipment fromaconnection point of view: The equipment isdesignedforpermanent
connection.
1.8Warrantyconditions
The supplierisresponsibleforcompleteness ofthe deliveryand guaranteesthesespecificationsofthe
productwhichare stated inthe Contract.
The supplierisnotresponsibleforanydeterioration ofparameters caused bythe customerduring storage,
unauthorised installation orimproperoperation.
1.9Under-guarantee andafter-guarantee service
Ourcustomersareprovidedwithprofessionalserviceofourfirmininstallation,operation, service, maintenance,
revision andhelpin troubleshooting forall ourproducts.
Trained professionalswait foryou also in ourcontracted servicecentres.
!
!

6 ST1-Ex
Under-guarantee serviceis performed bytheservicedepartment ofthe productionplant, orbya
contracted service centreaccording to a written claim.
In case ofoccurring ofanyfault pleaseletusknowitand state:
•type code
•serialnumber
•ambient parameters (temperature, humidity...)
•dutycycle including frequencyofswitching
•type ofswitching-off (position orthrust)
•set switching-off thrust
•type offault -description ofclaimed fault
•it isrecommended to placealso Installationcertificate.
It isrecommended to have after-guarantee service performed bythe servicedepartment ofthe
production plant, orbya contracted service centre.
1.10Operation conditions
1.10.1Productlocation and operation position
EA can beinstalled and operated atsheltered areasofindustrialplantswithout temperatureand humidity
regulation, protectedagainstclimate effects(e.g. directsunshine),also atareas with explosion dangerof
inflammable gasesand steam,specifiedas zone2 and 1,i.e. atareaswhere is possibilityof originating
explosive vapouratmosphere withinstandardoperation (according to EN/IEC60079-10).
Installation and operationof EA ispossiblein anyposition. Verticalposition ofoutput partaxisandwith
the controlpart above the valveisusual.
Warning:
Actuatorinstalledontheopen placemustbe protected againstadirectclimate effectsbyshelter.
Actuatorinstalledintheplacewith relativehumidityover80%andon theopenplaceundershelter
have tohavepermanentlyconnected spaceheaterwithout thermalswitch.
1.10.2Working enviroment
According tovalidstandardIEC60 721-2-1, therearedeliveredtheseversionsof electricactuators:
1)Version „temperate“ forclimate temperate.
2)Version „cold“- forclimate cold.
(Inaccordance withIEC 60 364-1, IEC60 364-5-51and IEC60364-5-55 withinvalidedition)
EA have to resist externalinfluencesand workfora certainty:
In conditionsofexternalenvironment marked as:
•warmmild to veryhot drywith temperatures-25°Cto +55°C.....................................................................AA 7*
•cold, warmmild to hot drywith temperatures-50°Cto +40°C....................................................................AA 8*
•with relativehumidity10÷100%,includingcondensation with maximumcontent 0,028kgofwater
in 1kg ofdryairattemperature 27°C, with temperatures-25°C to+55°C..................................................AB 7*
•with relativehumidity15÷100%,including condensationwith maximumcontent 0,036kg ofwaterin 1kg ofdry
airat temperature 33°Cwith possibilityofaerialcollisionsactivity, with temperatures
-50°C to +40°..............................................................................................................................................AB 8*
•with elevation up to2000 m, with barometricpressure rangefrom86 kPa up to108 kPa........................AC 1*
•with shallowdive– (product inprotection IPx7)....................................................................................AD 7*
•withstrongdustiness –with apossibilityofinfluencesofinflammable, non-conductedand non-explosive
dust; the middle layerofdust;the dustdrop more than350 but notmore than 1000 mg/m2perday(products
with protectionenclosure ofIP6x) ............................................................................................................AE 6*
•with occasionalorcasualappearance ofcorroding andpolluting substances(occasionalorcasual
exposeto corrodingorpollute chemicalsubstancesduring producing orusing ofthese
substances);atplaceswhereishandled with small quantityofchemicalproductsand thesecan
accidentallyget in contact with an electricdevice.......................................................................................AF3*
•with a possibilityofinfluencesofmechanicalstress:
•mediumsinusoidvibrationswithfrequencyin range from10 up to 150 Hz,with shift amplitude of0,15
mm forf<fp and acceleration amplitude 9.8 m/s2forf>fp (transitionfrequencyfp isfrom57 up to 62Hz)AH 2*
•mediumimpacts, shocks and vibrations..............................................................................................AG2*
•with seriousdangerofplantsand mouldgrowing.......................................................................................AK 2*

ST1-Ex 7
•with seriousdangerofanimaloccurrence (insects, birds, small animals)..................................................AL 2*
•with detrimentalinfluenceof radiation:
•ofstraycurrent with intensityofmagneticfield (direct oralternate,ofmainsfrequency)up to 400A.m-1 .....
..................................................................................................................................................................AM2-2*
•ofsun radiation with intensity>500 and < 700W/m2.......................................................................... AN2*
•with effectsofmediumseismicactivitywith acceleration >300Gal< 600 Gal..........................................AP 3*
•with indirectendangerbystorm..................................................................................................................AQ2*
•with quickairmovement and strong wind.......................................................................................AR 3 , AS3*
•stand on a conductive bottom)...................................................................................................................BC 3*
•with a dangerofinflammable gasesand vapours explosion -forExofversion....................................BE 3N2*
•firerisks...............................................................................................................................................BE 2*
*Marking inaccordance with IEC60364-1, IEC 60 364-5-51 and IEC 60 364-5-55 within valid edition
1.10.3Powersupplyand dutycycle
Powersupply:
electricmotor..............................................230 VAC ±10%, 3x400 VAC±10%, resp. 24 VAC/DC ±10%
control.............................................................................................230 VAC±10%,resp.24 VAC ±10%
potentiometertransmitter........................................................................................max. PxR VDC/AC
electronicpositionaltransmitter(EPV)without powersupply......................15up to 30VDC, or24 VDC
capacitive transmitterwithout powersupply...................................................................18 upto 28 VDC
powersupplyfrequency..........................................................................................50 Hz,or60*Hz±2 %
*Note: At frequency of60 Hzclosingtime isreducedby1.2 timest.
Dutycycle -according to EN/IEC 60034-1, 8:
EAST1-Ex aredesigned for remotecontrol:
•short-time operation S2-10min
•intermitted operation S4-25%, max. 90 cyclesperhour
EAST1-Ex with controller aredesigned for automotive regulation:
•intermitted operation S4-25%, 90 up to 1200 cyclesperhour
Note:
1. Dutycycle consist of load type, load factorand switching rate.
2. EA ST1-Exispossibleconnectwithan externalcontrollerand usethisEA ascontrolled EA,forthisEA
standsdutycycleand powerparameters asfortype ST1-Exwith built-incontroller.ForEA withcontrollerwe
do not suggest operatingspeed63 and80 mm permin.
1.11Packing, transport,storing and unpacking
Plochybezpovrchovejúpravysú predzabalenímošetrené konzervačnýmprípravkomMOGUL LV2-3.
Preservation isnot necessaryifthe following storage conditionsare compliedwith:
• Storage temperature: -10 to +50 °C
• Relativeairhumiditymax.80 %
•Electricactuators andtheiraccessoriesmustbe stored indry,wellventilatedcoveredspaces,
protectedagainstimpurities,dust, soilhumidity(byplacement to racks,oron palettes),chemicals
and foreign interventions
• There shallbeno corrosive gasespresent in the storage areas
The of EA ST1-Ex are deliveredinsolidpackagesguaranteeing resistancein accordancewith
EN/IEC 60 654.
Package isa box.Productsinboxesispossible toloadon the pallets(pallet isreturnable). On the outerside of
the package isstated:
•manufacturerlabel,
•name and typeofproduct,
•numberofpieces,
•otherdata – noticesand stickers.
The forwarderisobliged to securepacked products,loadedontransportationmeans,againstself-motion;
ifopen transportation meansareused, to securetheirprotectionagainstatmosphericprecipitationsand
splashing water.Displacement and securing ofproductsintransportation meansmustprovidetheirstable
position,exclude the possibilityoftheirinter-collision and theircollision with the vehiclewalls.
Transportation canbeexecuted byheatless and non hermeticspacesoftransportationvehicleswith influences
within the range:

8 ST1-Ex
-temperature: -25°C upto +70°C (a strange version –45 °C upto +45 °C)
-humidity:5 up to100 %,with max. watercontent0.028 kg/kg ofdryair
-barometricpressure 86 up to 108 kPa
Afterreceiving EAcheckwhetherduring transportorstoragetheactuatorwas not damaged.
Comparealsowhethertheparameterson theirnameplatesareinaccordance with accompanying
documentation orthe Contract. Ifany discrepancyorfaultoccurinformimmediatelyyoursupplier.
If the actuators and accessoriesarenot immediatelyinstalled, theyhaveto be stored indry,well-
ventilated sheltered rooms,protected against dirt, dust, soilhumidity(with placing onto shelvesoronto pallets),
chemicalimpactsand encroachment, at ambient temperaturefrom-10°Cup to+50°Cand relativehumidity
max. 80%.
Itis not allowedto storeEAintheopenairorinareasnot protectedagainstdirectimpactof
climate!
If anyscratchon the surfacefinishing occurs removeitimmediately-you protectthiswayactuators
against damaging with corrosion.
1.12 Appreciation oftheproductand packing
The productand itspackage aremade of recyclingmaterials.Do not throwthesinglepartsof the package
and ofthe productaftertheirlifebut sortthemaccording to instructionsincorresponding executivesor
regulationsofenvironment protection, andallow theirrecycling.
The productanditspacking arenot asourceofanyenvironment pollution orcontamination and do not
contain anydangerouswaste.
2.Description, function and specifications
2.1Description and function
The explosion-proof ST1-Ex,ST1-Exwith controller electricactuators consistofthreepartsdiffering in
theirfunction. The gearpartisplaced inthe bottom and covered with aboard(2)(Fig.3)wherethe controlpartis
located. Afterremovingofthe uppercoveronlythecontrolpartisvisible.The terminalboard(6))(Fig.3)is
locatedseparately,inthe terminalboardcasewithbushings(12))(Fig.3)connected withthe controlpartusing
the 12-corebushing(16))(Fig.3).The actuatorlinearmovement andconnectionto thevalveisprovidedbythe
gearpart fastenedon the gearpartoutput.
The poweroutputofthe reversibleasynchronousmotorisled through thetwo-stage spurgearingwith a
brake, the planet gearingwith Wolformtearteeth to the motion screwwheretheoutput screwismoving along.
Forvariousspeed valuesvariousnumbers ofgearwheelsinthe input gearing areused. In the planet gearthe
movement fromthe wormgearing used forthe manualcontrol(11))(Fig.3)themovement neededforthrust
switching (4))(Fig.3)isderived. The switching thrust iscontinuouslyadjustable.
In thecountershaftthepinionsaremade ofmetal,wheelsareofplastics,what resultsinreducedactuator
noisiness.The splined shaftconnected with the controlcentralwheelleadsfromthe crown gear.The central
wheelisplaced in the board bearing removable afterloosening the fixing screws.
The boardiscompact and consistsof:
•the position-indication unit,
•the gearunit,
•the transmitterunit,
•the electricmotorwith a capacitor,
•the spaceheaterwith the thermalswitch.
The position-indicationand transmitterunitsaredrivenwiththe gearunit.The position-indicationunit(3)
(Fig. 3)consistsofthecamsystem(24, 25, 26 and27)(Fig.4).The camsarelocked centrallywiththenuts(23)
whilethe camsthemselvesareadjustableusing friction washers.The cam systemallowsadjustingof permanent
indication from0up to100%oftheoperationstroke. Remote position watchingorcontrolisprovided bythe
position transmitter(potentiometer) (5)(Fig.3).The enlarged partofthe lowercaseisdesignedforthe terminal
board case.With removing ofthe terminalboardcase the composed terminalboard (6)isvisible.
Additional accessories:
Manual control:made up bya hand wheelwith awormgearing.
The ST1-Ex with controller version isequipped with an electronic controller.