3.568.5275.226

© Copyright 2016E X P E R T I S E S O L U T I O N S S U S T A I N A B I L I T Y

IM-P343-16CH Issue 7 - 2016

1. Safety information

2. Introduction

3. Installation

4. Commissioning

5. Maintenance

6. Spare parts

7. Faultfinding

EP5 and ISP5 SeriesElectropneumatic PositionersInstallation and Maintenance Instructions

Attention: Additional instructions are required when a ATEX intrisically safety instrument ISP5 is used in an explosion risk area.

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1. Safety informationSafe operation of these products can only be guaranteed if they are properly installed, commissioned, usedandmaintainedbyqualifiedpersonnel(seeparagraph1.11)incompliancewiththeoperatinginstructions.Generalinstallationandsafetyinstructionsforpipelineandplantconstruction,aswellastheproperuseoftoolsandsafetyequipmentmustalsobecompliedwith.

WARNING: Themaximumprocessfluid temperaturemustbesuitable foruse if theunit is to be used in any potential explosive atmosphere. For the device maintenance inapotentiallyexplosiveatmosphere,werecommendtheusageoftoolswhichdonotproduce and / or propagate sparks.

1.1 Intended useReferring to the Installation and Maintenance Instructions, name-plate and Technical Information Sheet, check that the product is suitable for the intended use / application. The products comply withtherequirementsoftheEuropeanDirective2014/34/EU(ATEX).

1.2 AccessEnsuresafeaccessandifnecessaryasafeworkingplatform(suitablyguarded)beforeattemptingtoworkontheproduct.Arrangesuitableliftinggearifrequired.

1.3 LightingEnsureadequatelighting,particularlywheredetailedorintricateworkisrequired.

1.4 Hazardous liquids or gases in the pipelineConsiderwhat is in thepipelineorwhatmayhavebeen in thepipelineatsomeprevious time.Consider:flammablematerials,substanceshazardoustohealth,extremesoftemperature.

1.5 Hazardous environment around the productConsider:explosion riskareas, lackofoxygen (e.g. tanks,pits),dangerousgases,extremesoftemperature,hotsurfaces,firehazard(e.g.duringwelding),excessivenoise,movingmachinery.

1.6 The systemConsidertheeffectonthecompletesystemoftheworkproposed.Willanyproposedaction(e.g.closingisolationvalves,electricalisolation)putanyotherpartofthesystemoranypersonnelatrisk?Dangersmightincludeisolationofventsorprotectivedevicesortherenderingineffectiveofcontrolsoralarms.Ensureisolationvalvesareturnedonandoffinagradualwaytoavoidsystemshocks.

1.7 Pressure systems Ensurethatanypressureisisolatedandsafelyventedtoatmosphericpressure.Considerdoubleisolation(doubleblockandbleed)andthelockingorlabellingofclosedvalves.Donotassumethatthesystemhasdepressurisedevenwhenthepressuregaugeindicateszero.

1.8 TemperatureAllowtimefortemperaturetonormaliseafterisolationtoavoiddangerofburns.

1.9 Tools and consumablesBeforestartingworkensurethatyouhavesuitabletoolsand/orconsumablesavailable.Useonlygenuine Spirax Sarco replacement parts.

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1.10 Protective clothingConsiderwhetheryouand/orothersinthevicinityrequireanyprotectiveclothingtoprotectagainstthehazardsof,forexample,chemicals,high/lowtemperature,radiation,noise,fallingobjects,anddangers to eyes and face.

1.11 Permits to workAllworkmustbecarriedoutorbesupervisedbyasuitablycompetentperson.Installation and operating personnel should be trained in the correct use of the product according to the Installation and Maintenance Instructions.Whereaformal'permittowork'systemisinforceitmustbecompliedwith.Wherethereisnosuchsystem,itisrecommendedthataresponsiblepersonshouldknowwhatworkisgoingonand,wherenecessary,arrangetohaveanassistantwhoseprimaryresponsibilityissafety.Post'warningnotices'ifnecessary.

1.12 HandlingManualhandlingoflargeand/orheavyproductsmaypresentariskofinjury.Lifting,pushing,pulling,carryingorsupportingaloadbybodilyforcecancauseinjuryparticularlytotheback.Youareadvisedtoassesstheriskstakingintoaccountthetask,theindividual,theloadandtheworkingenvironmentandusetheappropriatehandlingmethoddependingonthecircumstancesoftheworkbeingdone.

1.13 Residual hazardsIn normal use the external surface of the product may be very hot. If used at the maximum permitted operating conditions the surface temperature of some products may reach temperatures of 176°F.Manyproductsarenotself-draining.Takeduecarewhendismantlingorremovingtheproductfromaninstallation(referto'Maintenanceinstructions').

1.14 FreezingProvisionmustbemadetoprotectproductswhicharenotself-drainingagainst frostdamageinenvironmentswheretheymaybeexposedtotemperaturesbelowfreezingpoint.

1.15 DisposalUnlessotherwisestatedintheInstallationandMaintenanceInstructions,thisproductisrecyclableandnoecologicalhazardisanticipatedwithitsdisposalprovidingduecareistaken.

1.16 Returning productsCustomersandstockistsareremindedthatunderECHealth,SafetyandEnvironmentLaw,whenreturningproductstoSpiraxSarcotheymustprovideinformationonanyhazardsandtheprecautionstobetakenduetocontaminationresiduesormechanicaldamagewhichmaypresentahealth,safetyorenvironmentalrisk.ThisinformationmustbeprovidedinwritingincludingHealthandSafetydatasheetsrelatingtoanysubstancesidentifiedashazardousorpotentiallyhazardous.

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2. Introduction

1 =Receiver0.2to1bar(3to15psi)2 =Amplifierrelay3 =Adjustableorifice:sensitivitysetting4 =Damping:outletairflowadjustment5 = Flapper6 = Reaction spring7 =Zeroscrew8 = Positioner lever9 =Lock-nut10 = Slider11 = Sector lever

A = Control signalI = I /P converter outputS =AirsupplyO = Positioner outputU1 = IncreaseactionnozzleU2 =Decreaseactionnozzle

87

9

65

U1 U2

1

S2

O

I+-

11

10

A

43

2.1 IntroductionTheEP5isa2wirelooppoweredpositionerrequiringa4-20mAcontrolsignal,andisdesignedforusewithlinearpneumaticvalveactuators.Thepositionercomparestheelectricalsignalfroma controllerwith theactual valvepositionand variesapneumatic output signal to theactuatoraccordingly.Thedesiredvalvepositionisthereforemaintainedforanycontrolsignalandtheeffectsofvaryingdifferentialpressure,stemfrictionandhysterisisareovercome.AmountingkitissuppliedtosuitallNAMURstandardcolumnsoryokes.Note:A0-10VdcinputsignalandanintrinsicallysafeversionISP5arealsoavailable.

2.2 Operating principleTheEP5operatesonaforcebalanceprinciplebymeansofanozzle/flappermechanismandafeedbackspring(refertoFigure1).

The electrical control signal (A) is converted into a proportional air pressure (I). This pressure is appliedtotheflapper(5) via the receiver (1),causingadeflectionoftheflapperrelativetothenozzlesU1/U2. From the air supply (S)areducedbleedofairisfedtotheamplifierrelay(2) and into one ofthenozzlesU1/U2.Astheflappermovesthepressuredropthroughthenozzleissensedbytheamplifierrelay.Theamplifierrelayoutputsasignal(O)totheactuatorwhichisproportionaltothepressuredropthroughthenozzle.

Astheactuatormoves,connectinglever(8) causes a change in tension of the reaction spring (6). Thistensionisappliedtotheflappercausingittomovetoanewpositionatwhichtheforcesappliedby the spring and the applied pressure (I) balance.

Important:This instrumentbleedsair innormaloperationatarateofapproximately0.7Nm³ / hour at a supply pressure of 6 bar.

Fig. 1

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3. InstallationNote: Before starting any installation observe the 'Safety information' in Section 1.This publication is provided as a guide and it is recommended that it is read thoroughly prior to installation.AlsorefertotheseparateInstallationandMaintenanceInstructionsforthecontrolvalveand actuator.

3.1 LocationThepositionershouldbemountedinsufficientspacetoallowremovalof thecoverandprovideaccesstoconnections.Whenfittingtoanactuator,ensurethepositionerwillnotbeexposedtoanambient temperature outside the range -15°C to +65°C. The positioner enclosure is rated to IP54 seeBSEN60534-6-11998.Connectionofairsupplypressure(1.4to6barg)andcontrolsignal(4-20mAor0-10Vdc)shouldbe considered prior to choice of location.

3.2 Mounting the positioner onto the actuatorTheEP5positionermayhavebeensuppliedalreadyfactoryfittedontothevalveactuator.However,using the mounting kit provided it can be attached retrospectively onto any other type of valve and actuatorconformingtoNAMURstandards.

Step 1 Identify actuator typeForcorrectoperationitisimportanttoknowtwofactorswhichwillaffectoptimummovementofthepositioner feedback mechanism:

- Thedistancebetweentheaxesofthevalve/actuatorstemandthepositionerslidepin.

- The travel of the valve actuator. To ensure these are set correctly, please note the following:

- WhenattachinganEP5toanySpiraxSarcovalveactuator,ignoreStep3.

- For non-Spirax Sarco actuators, ignore Step 2.

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Step 2 For attachment to Spirax Sarco actuatorsUsingthe2offM6panheadscrews,securelyattachthe'T'shapedslidingpinholdertothevalveactuatorcouplingblock(Figure2).ApplyLoctitetotheslidingpinandscrewintohole'Y'(asshown)on the sliding pin holder and tighten.

Usingthe2offM8x15hexheadscrewsand8mmspringwashers,attachthemountingplatetothebackofthepositioner,utilisingholesNo.2inthebracket(Figure3).Takecarenottoover-tightenthesescrewsandstripthethreads.

Step 3 For attachment to non-Spirax Sarco actuatorsUsingthe2offM6panheadscrews,securelyattachthe'T'shapedslidingpinholdertothevalveactuatorcouplingblock(Figure2).Dependingonthetravelofthevalveactuator,applyLoctitetoslidingpinandscrewintothecorrectholeontheslidingpinholderandtighten.UseFigure2andTable 1 to determine the correct hole to use.

Fig. 2Close-up of sliding pin holder fitted to valve coupling.

Fig. 3

Valve travel Hole to be used 8-15mm X 15-30mm Y above30mm Z

Table 1

Usingthe2offM8x15hexheadscrewsand8mmspringwashers,attachthemountingplateto the back of the positioner. The correct fixing hole may be determined by reference to Figure 3, Table 2 and Figure 4. Take care not to over-tighten these screws and strip the threads.

Z

X YValveactuator coupling

block

'T'shapedsliding pin holder

134 2Positioner

Mounting plate

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Fig. 5

Table 2 D Hole to be used Upto125mm 1 125to150mm 2 150to175mm 3 above 175 mm 4

Fig. 4 Pillar/yoke spacing, showing 50 % travel.

Actuatorspindle

Actuatorpillaror yoke

100%

50%

0%

D

Valvepositionindicator

Slide pin

Step 4 Temporarily apply adequate air pressure directly into the actuator so that the valve is at50%oftravel(Figure5).

Step 5 Engagetheslidepin intothepositioner lever(seeFigure5,notingthepositionofthespring,abovethepin)andlooselyfixthepositionertotheactuator.Foryokeactuatorsusethesin-gleelongatedscrewholewiththeM8x20screwandspringwasher,forpillarsusetheU-clamps.

Important:Slidepositionerverticallyupordowntheyoke/pillarssothepositionerleverishorizontalat50%travel,andtheindicatoratLHSisaligned(Figure5).Securethetighteningscrews/nuts.

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Step 6Fittheangledprotectionplatetotherearofthepositionerusingthe2offcaptiveM3panheadscrews.Accesstothesecaptivescrewsisfrominsidethepositioner.

Step 7 Adjusttheairsupplypressuretostroketheactuatorfrom0%to100%andensurethepositioner lever rotates freely. Remove the temporary air supply from the actuator.

Step 8 Fitting a gauge block (optional)ToaidcommissioningitisrecommendedtofitagaugeblockandpressuregaugestoallEP5s.Pleasenote that gauges and gauge block can be supplied as spare parts if required.

FitgaugestotheblockbeforeattachingtheblocktotheEP5.Usethreadsealanttoensureairtightconnections.TheuppergaugedisplaystheoutputoftheI/Pconverter,andisnormally0-2barg.Thelowergaugedisplaysthepositioneroutputpressure,sothegaugerangewilldependontheactuator.

RemoveanyairfittingsandblankingplugfromtheEP5,thenattachtheassembledblocktotheEP5usingthe2offsocketheadcapscrewssupplied.Ensurethesealing'O'ringsarecorrectlyfittedtosealthejointsbetweentheEP5bodyandthegaugeblock.Replacethefittingsandblankingpluginto the corresponding ports on the gauge block.

3.3 Connecting up

3.3.1 Pneumatic connections (with or without a gauge block)Warning:Airsupplymustbedry,oilanddustfreetoISO8573-1:class2:3:1.AcoalescingfilterregulatorsuchasaSpiraxSarcoMPC2will removeoilanddirt tomeetthisstandard ifpro-perlyfittedandmaintained.Dirtyairsupplymaydamagetheproductandinvalidatewarranty.The supply air pressure must not exceed the maximum allowable air pressure of the actuator.

AvoiduseofferrouspipeworkaftertheMPC2.Forbestperformance,settheairsupplypressuretoabout0.5bargabovethepressurerequiredtofullytraveltheactuator.

Checkallconnectionsforleaks.PleasenotehoweverthattheEP5bleedsairinnormaloperationatarateofapproximately0.7Nm³/hour at 6 bar supply pressure.

Pneumaticconnectionsarelocatedattherighthandendofthepositionerandidentified I, S and Oasfollows:I - NotusedonEP5,fit¼" NPT plug.

S - Airsupply-1.4bargto6barg,dependinguponrequiredactuatorspringrange.

O - Outputsignaltotheactuator.

Connections are ¼"NPT female. Interconnectionbetweenpositionerandactuatorshouldbeatleast6mmODtube.

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3.3.2 Electrical connectionsCablingshouldbeinstalledinaccordancewithBS6739-InstrumentationinProcessControlSy-stems: Installation design and practice or local equivalent.

TheEP5onlyrequiresa4-20mA(standard)or2-10Vdc(ifrequested)signal.Removethefrontcoverandlocatetheterminalblockandearthterminalpost(Figure6).

Note:Ensureresistancefromearthposttolocalearth(e.g.pipework)islessthan1Ω.

ConnectiontotheunitisthroughthePg13.5cablegland(assupplied),whichwhenusedwithsuitablecablewillensuretheIP54protectionrating.Appropriateconduitconnectionsmaybeusedinstead.

Connectconductors(0.5to2mm²)totheterminalblockandearthpost(3mm²)notingthepolarity+/-showninFigure6.

InhazardousareasusemodelISP5withintrinsicprotection(typeEExiallCT6,T5,T4)ensuringthepowersupplyfromadjoiningequipmentiscertifiedinaccordancewithEN50.014andEN50.020standards,inrespectofthelimitsofelectricfeaturesshownatapprovalstage.RefertoapprovalcertificatesuppliedwitheachISP5product.

Fig. 6

Cablegland

Terminalblock-+

Earthterminalpost

I

S

O

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4. CommissioningOnce the positioner has been mounted and connected up, proceeed as follows.

Step 1 Set the valve actionEstablishingthecorrectactionofthevalveisdoneby:

a. ConnectiontoeitherU1orU2nozzles(seeFigure7)and

b. Settingthesliderintheupperorlowerportionofthecrescentshapedsectorlever(Figure8).

U1 = Increase action = Withincreasingelectricalcontrolsignaltheairpressuretotheactuatorwillincrease.

U2 = Decreaseaction = Withincreasingelectricalcontrolsignaltheairpressuretotheactuatorwilldecrease.

To change the working nozzle connections (U1 or U2):Disconnecttheairsupply.Loosentheretainingplateandrotateitclearofthetubeholder.Pullthe tube holder clear of its seat and re-insert the tube holder into the alternative seat location. Lockinplacewithalternativeretainingplate(lockunusedretainingplatetopreventlossofplate).Reconnect air supply.

Fig. 7

Connection tonozzleU2

Connection tonozzleU1

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To change the slider location:RefertoFigure8todeterminethecorrectportion.Tochangethesliderslackenthescrewandslideit into the correct portion of the arm.

*Thearrowshowsthestemmovementdirectionwhentheinputcontrolsignalincreases.

Fig. 8a Increase action and spring extend

Fig. 8b Increase action and spring retract

Fig. 8c Decrease action and spring extend

Fig. 8d Decrease action and spring retract

Uppersector

Uppersector

Lowersector

Lowersector

U1nozzle* U2nozzle*

U2nozzle*

U1nozzle*

I

OS

I

OS

I

OS

I

OS

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Step 2 Set sensitivityThepositionersensitivityisadjustedusingthesensitivityscrew(Xp%,seeFigure10).Itissetde-pending on air supply pressure. Before the commissioning stage it is essential to set the sensitivity withinaproportionalbandof(3%to6%).UseFigure10toadjustthesensitivityscrewbyfirstlyfullyclosingthescrew(clockwise),thenreopenthescrew:-

Supply pressure (S) 1.4 bar - Screwopen¾ of a turn4.0bar - Screwopen¼ of a turn6.0bar - Screwopen of a turn

Note: AdjustmentoftheXp%screwcausesachangeofpositioner'zero'point,anditisthereforeimportanttorepeatthezeroingandtravelsettingprocedures(Steps4and5)afteranychanges.

Toincreasepositionersensitivityclosetheadjustingscrew,todecreasesensitivityopenthescrew.Do notopenthescrewbeyondthemechanicallock.

Fig. 9

Fig. 10

Xpcorrectvalue

Openingdegree ¾

½¼

0 3 6

1.4 bar

4.0bar

6.0bar

(Xp%)

Supply pressure

Sensitivityscrew

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Step 3 Set dampingThefinaladjustmentofdampingscrewshouldbeperformedwithplant inoperation, inorder tolimit,ifnecessary,theactuationspeed.Duringthecommissioningsetthedampscrewflushwiththe body see Figure 11.

Thereductionofairflowratecapacitytotheactuatorwillslowdownthevalvemovementtolimittheeffectofcyclinghunting.Closingthescrew(clockwise)increasesdamping,andviceversa.

Step 4 Set zero pointCheck all air and electrical connections are in place. Check air supply pressure (S)iscorrect(seeSection3.3.2).Checkelectricalcontrolsignal(A)(seeSection3.3.3)isattheminimumrequired(normally4mAor0V),buttheapplicationmayrequireadifferentsetting.Itmayalsobeadvisabletoincreasetheminimumby0.5mAor0.25Vtoensurethevalveiscompletelyclosed.For3-portvalves(oriftheactionhasbeenreversedfor2-portvalves)ahigherelectricalsignalcorrespondstotheclosedvalveposition,itmaybebeneficialtodecreasethemaximumelectricalcontrolsignalto19.5mAor9.75V.Thiswillensurethatthevalveisfirmlyseatedwhenthefullelectricalsignalof20mAor10Visapplied.

Locatezeropointadjustmentscrew(seeFigure12)andreleasethelockingring.Adjustscrewuntilthevalvestartstomoveandlocktheadjusterinplace.

Checkthezeropointbyreducingtheelectricalcontrolsignal(A)(seeSection3.3.3)tozero.Slowlyincreasetheelectricalcontrolsignaltowardstheminimumlevelwhilstmonitoringvalvemovement.Shouldmovementtakeplacebeforeoraftertheminimumcontrolsignalthenrepeatadjustmentuntilmovementcoincideswithminimumcontrolsignal.

Fig. 11

Dampscrew

Fig. 12

SliderLockingring

Zero pointadjustmentscrew

Sector lever

Centrallockingscrew

Note:Positionersfittedwithagaugeblockhavethebenefitofanticipatingvalvemovementbyindicating increases of output air pressure.

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Step 5 Set travelIncreasetheelectricalcontrolsignaltotheuppervalue(normally20mAor10V,butthisdependsontheapplication)andnowcheckthetravelofthevalve.Ifrequired,slackenthecentrallockingscrew(seeFigure12)andadjustthesliderupordowntheupperorlowerportionofthecrescentshapedsectorlever.Movingthesliderawayfromthepivotwillreducethetravel,andviceversa.Normally,exceptwith3-portvalves,thefullyopenpositionisachievedbeforethevalveplughitstheuppermechanicalstopofthevalve/actuator.Avoidsettingsofthepositionerthatallowcontactwiththismechanicalstop.Varytheelectricalcontrolsignalaroundtheuppervaluetoverifythetravelsetting,andifnecessaryrepeattheadjustmentoftheslideruntiltherequiredtraveloccursattheuppervalue.

Important:ZeroandtravelsettingsonEP5arenotindependentofeachother,sore-checkthezerosetting as described in Step 4. It may prove necessary to repeat Steps 4 and 5 several times until acceptablezeroandtravelsettingsareachieved.Forfineadjustmentofthetravel,thepotentiometershowninFigure13canbeused.Thisshouldonlybeusedforfinaladjustmentof+/-5%.

Whencomplete,lockbothzeroandtraveladjustments.

Split range operationEP5maybesplitrangedtosequentiallyactuatetwovalvesfromonecontrolsignal(Forexample:valve1setto4-12mAandvalve2setto12-20mA).SplitrangingisachievedbyadjustmentofthezeroandtravelsettingsrefertoSteps4and5.

Fig. 13

Traveladjustmentpotentiometer

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5. Maintenance5.1 Regular maintenance1. Drainanybuild-upwithintheairsupplyfiltersetasimpuritiessuchasoil,wateranddirt willcauseinconsistentoperation.

2. Ensureairsupplyisatthecorrectpressure(seeSection3.3.2andrefertoactuatorTI).

3. Make visual checks to ensure the valve is operating correctly. 5.2 Corrective maintenance

5.2.1 Removal and cleaning of sensitivity adjuster (see Figure 14):

- Loosenandremovelock.

- Notesettingthenremovesensitivityscrew.

- Washadjusterwithsolvent,checkingconditionoftheconeandensuring0.35mmside hole is clear.

- Drywithcleancompressedairtoensurenoremainingcontaminants.

- Refitthecleanedadjusterandunscrewit1turnfromitsstop.

- Refitthelocktotouchtheadjustertopandsecurewithlock-nut.

- Set sensitivity see Step 2, Section 4, Commissioning.

- Resetzeroandspanifrequired.

Fig. 14

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5.2.3 Check damping grease:- Ensuregapof1mmexistsbetweenfacesofdamper.Adjustifnecessary.

- Verifygreaseispresentbetweenfaces.

- Replacegreaseifnecessary(contactSpiraxSarcofordetails).

5.2.2 Removalandcleaningofcapillaryorifice (see Figure 15):- Loosenlockingplatescrew.

- Rotatelockingplatetoexposecapillaryorifice.

- Usingsuppliedextractor/cleanerpulltheorificefromthebody.

- Cleanthesmallorificeandcrossdrillingusingonlythespecialcleaningwiresupplied.

- Reassembletheorificeensuringboth'O'ringsareinplaceandthelockplatecoverstheorifice.

Fig. 16

LockingplateCapillary orifice

Dampingfaces

Capillary extractor /cleaner

Fig. 15

Extractingthread

Cleaningwire

Extractor/cleaner

Capillary orifice

Spare'O'ring

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6. Spare partsAvailable sparesGaugeblock(withoutgauges) 1Gauge0-2bar 2Gauge0-4bar 3Gauge0-7bar 4Springs and tubes 5Set of gaskets, diaphragms and orifice 6Amplifyingrelayset 7

How to order spares and accessoriesAlways order spares by using the description in the column headed 'Available spares' and adescriptionoftheproduct,togetherwiththeTAGnumber.Example:1offGauge0-2barforaSpiraxSarcoEP5positioner,TAG907.

Product return procedurePleaseprovidethefollowinginformationwithanyequipmentbeingreturned:-1. Yourname,Companyname,addressandtelephonenumber,ordernumberandinvoice and return delivery address.2. Descriptionofequipmentbeingreturned.3. Descriptionofthefault.4. Iftheequipmentisbeingreturnedunderwarranty,pleaseindicate:

i. Dateofpurchaseii.Originalordernumber

Please return all items to:ReturnsInvestigationsDepartmentRunnings Road,KingsditchTradingEstateCheltenhamGlos,GL519NXUnitedKingdom

Alternatively, please return any items to your local Spirax Sarco branch.Pleaseensureallitemsaresuitablypackedfortransit(preferablyintheoriginalcartons).

Fig. 17

1

2

3 or 4

76 5

TAGnumber

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7.FaultfindingOutput pressure too low or zero

Cause Remedya. No control signal a.RestoremAsignalb.Lowairsupplypressure b.Verifyactuatorairpressurerequirementc.Cloggedordirtysensitivityadjuster c.CleanadjusterseeSection5.2.1d. Clogged or dirty capillary orifice d. Clean orifice see Section 5.2.2

e. Incorrect set-up e. Recalibrate see Section 4, Steps 1 to 5

f.Damagedpneumaticactuatororpiping f.Verifyreplaceasnecessary g. Port I not blanked or leaking g. Insert ¼" NPT blank in port I

Output pressure too high Cause Remedya.Sensitivityadjusteropentoofar a. Recalibrate see Section 4, Step 2

Actuator movement too slow Cause Remedya.Lowairsupplycapacity a.Checksupplycapacityandpipesizesb.Dampingscrewclosedtoofarorclogged b. Recalibrate see Section 4, Step 3

Actuator failing to close Cause Remedya.Outputpressuretoolow a. Refer to previous fault

b.Incorrectzeropoint b. Recalibrate see Section 4, Step 4

c.Dampingscrewclosedorclogged c.CleanscrewandrecalibrateseeSection4,Step3d.Valve /actuatorcouplingincorrect d.Reset(refertovalve/actuatorIMIs)e.Actuatortoosmall e. Fit correct actuator

Actuator failing to fully open valve Cause Remedya.Outputpressuretoolow a. Refer to previous fault

b.Incorrecttraveladjustment b. Recalibrate see Section 4, Step 5

c.Dampingscrewclosedorclogged c.CleanscrewandrecalibrateseeSection4,Step3d.Valve /actuatorcouplingincorrect d.Reset(refertovalve/actuatorIMIs)e.Actuatortoosmall e. Fit correct actuator

Hunting Cause Remedya.Incorrectcontrollersetup(P, I, and D) a.Verifyandadjustaccording toprocessrequirementb. Sensitivity orifice closed too far b.Adjustbyopeningsensitivityscrew see Section 4, Step 2

c.Excessivevalvefriction c.VerifyandmaintainasvalveIMId.Controlvalveover-sizing d.Verifyoperatingconditionsagainstvalvecapacity.Note:Theeffectsofhuntingcausedbyvalveover-sizingorunstableprocessconditionscanbereducedbyadjustmentofdampingscrewseeSection4,Step3.

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3.568.5275.226 CH Issue 7 - 2016.09

Spirax-Sarco S.r.l. - Via per Cinisello, 18 - 20834 Nova Milanese (MB) - Tel.: 0362 49 17.1 - Fax: 0362 49 17 307

SERVICEFortechnicalsupport,pleasecontactourlocalSalesEngineerorourHeadOfficedirectly:

Spirax Sarco S.r.l.-TechnicalAssistanceViaperCinisello,18-20834NovaMilanese(MB)-ItalyTel.:(+39)03624917257-(+39)03624917211-Fax:(+39)03624917315E-mail:support@it.spiraxsarco.com

LOSS OF GUARANTEETotal or partial disregard of above instructions involves loss of any rights to guarantee.