Spirax Sarco EP5 Series Installation And Maintenance Instructions Manual

Brand: Spirax Sarco

Model: EP5 Series

Type: Installation And Maintenance Instructions Manual

This manual is also suitable for

ISP5 Series

3.568.5275.226

EXPER

TISE SOLUTIONS SUST

AINABILITY

IM-P343-16

CH Issue 7 - 2016

1. Safety information

2. Introduction

3. Installation

4. Commissioning

5. Maintenance

6. Spare parts

7. Faultnding

EP5 and ISP5 Series

Electropneumatic Positioners

Installation and Maintenance Instructions

Attention: Additional instructions are required when a ATEX

intrisically safety instrument ISP5 is used in an explosion risk area.

3.568.5275.226

1. Safety information

Safe operation of these products can only be guaranteed if they are properly installed, commissioned,

usedandmaintainedbyqualiedpersonnel(seeparagraph1.11)incompliancewiththeoperating

instructions.Generalinstallationandsafetyinstructionsforpipelineandplantconstruction,aswell

astheproperuseoftoolsandsafetyequipmentmustalsobecompliedwith.

WARNING: The maximum process uid temperature must be suitable for use if the

unit is to be used in any potential explosive atmosphere. For the device maintenance

inapotentiallyexplosiveatmosphere,werecommendtheusageoftoolswhichdonot

produce and / or propagate sparks.

1.1 Intended use

Referring 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

withtherequirementsoftheEuropeanDirective2014/34/EU(ATEX).

1.2 Access

Ensuresafeaccessandifnecessaryasafeworkingplatform(suitablyguarded)beforeattempting

toworkontheproduct.Arrangesuitableliftinggearifrequired.

1.3 Lighting

Ensureadequatelighting,particularlywheredetailedorintricateworkisrequired.

1.4 Hazardous liquids or gases in the pipeline

Considerwhatisin thepipeline orwhat mayhave beenin thepipeline atsome previoustime.

Consider:ammablematerials,substanceshazardoustohealth,extremesoftemperature.

1.5 Hazardous environment around the product

Consider:explosion riskareas, lack ofoxygen (e.g.tanks, pits),dangerous gases,extremes of

temperature,hotsurfaces,rehazard(e.g.duringwelding),excessivenoise,movingmachinery.

1.6 The system

Considertheeectonthecompletesystemoftheworkproposed.Willanyproposedaction(e.g.

closingisolationvalves,electricalisolation)putanyotherpartofthesystemoranypersonnelatrisk?

Dangersmightincludeisolationofventsorprotectivedevicesortherenderingineectiveofcontrols

oralarms.Ensureisolationvalvesareturnedonandoinagradualwaytoavoidsystemshocks.

1.7 Pressure systems

Ensurethatanypressureisisolatedandsafelyventedtoatmosphericpressure.Considerdouble

isolation(doubleblockandbleed)andthelockingorlabellingofclosedvalves.Donotassumethat

thesystemhasdepressurisedevenwhenthepressuregaugeindicateszero.

1.8 Temperature

Allowtimefortemperaturetonormaliseafterisolationtoavoiddangerofburns.

1.9 Tools and consumables

Beforestartingworkensurethatyouhavesuitabletoolsand/orconsumablesavailable.Useonly

genuine Spirax Sarco replacement parts.

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1.10 Protective clothing

Considerwhetheryouand/orothersinthevicinityrequireanyprotectiveclothingtoprotectagainst

thehazardsof,forexample,chemicals,high/lowtemperature,radiation,noise,fallingobjects,and

dangers to eyes and face.

1.11 Permits to work

Allworkmustbecarriedoutorbesupervisedbyasuitablycompetentperson.

Installation and operating personnel should be trained in the correct use of the product according

to the Installation and Maintenance Instructions.

Whereaformal'permittowork'systemisinforceitmustbecompliedwith.Wherethereisnosuch

system,itisrecommendedthataresponsiblepersonshouldknowwhatworkisgoingonand,where

necessary,arrangetohaveanassistantwhoseprimaryresponsibilityissafety.

Post'warningnotices'ifnecessary.

1.12 Handling

Manualhandlingoflargeand/orheavyproductsmaypresentariskofinjury.Lifting,pushing,pulling,

carryingorsupportingaloadbybodilyforcecancauseinjuryparticularlytotheback.Youareadvised

toassesstheriskstakingintoaccountthetask,theindividual,theloadandtheworkingenvironment

andusetheappropriatehandlingmethoddependingonthecircumstancesoftheworkbeingdone.

1.13 Residual hazards

In 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.

Manyproductsarenotself-draining.Takeduecarewhendismantlingorremovingtheproductfrom

aninstallation(referto'Maintenanceinstructions').

1.14 Freezing

Provisionmustbemadetoprotectproductswhicharenotself-drainingagainstfrostdamagein

environmentswheretheymaybeexposedtotemperaturesbelowfreezingpoint.

1.15 Disposal

UnlessotherwisestatedintheInstallationandMaintenanceInstructions,thisproductisrecyclable

andnoecologicalhazardisanticipatedwithitsdisposalprovidingduecareistaken.

1.16 Returning products

CustomersandstockistsareremindedthatunderECHealth,SafetyandEnvironmentLaw,when

returningproductstoSpiraxSarcotheymustprovideinformationonanyhazardsandtheprecautions

tobetakenduetocontaminationresiduesormechanicaldamagewhichmaypresentahealth,safety

orenvironmentalrisk.ThisinformationmustbeprovidedinwritingincludingHealthandSafetydata

sheetsrelatingtoanysubstancesidentiedashazardousorpotentiallyhazardous.

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2. Introduction

1 =Receiver0.2to1bar(3to15psi)

2 =Amplifierrelay

3 =Adjustableorifice:sensitivitysetting

4 =Damping:outletairflowadjustment

5 = Flapper

6 = Reaction spring

7 =Zeroscrew

8 = Positioner lever

9 =Lock-nut

10 = Slider

11 = Sector lever

A = Control signal

I = I /P converter output

S =Airsupply

O = Positioner output

U1 =Increaseactionnozzle

U2 =Decreaseactionnozzle

U1 U2

2.1 Introduction

TheEP5isa2wirelooppoweredpositionerrequiringa4-20mAcontrolsignal,andisdesigned

forusewithlinearpneumaticvalveactuators.Thepositionercomparestheelectricalsignalfrom

a controller with the actual valve position and varies a pneumatic output signal to the actuator

accordingly.Thedesiredvalvepositionisthereforemaintainedforanycontrolsignalandtheeects

ofvaryingdierentialpressure,stemfrictionandhysterisisareovercome.Amountingkitissupplied

tosuitallNAMURstandardcolumnsoryokes.

Note:A0-10VdcinputsignalandanintrinsicallysafeversionISP5arealsoavailable.

2.2 Operating principle

TheEP5operatesonaforcebalanceprinciplebymeansofanozzle/appermechanismanda

feedbackspring(refertoFigure1).

The electrical control signal (A) is converted into a proportional air pressure (I). This pressure is

appliedtotheapper(5) via the receiver (1),causingadeectionoftheapperrelativetothenozzles

U1/U2. From the air supply (S)areducedbleedofairisfedtotheamplierrelay(2) and into one

ofthenozzlesU1/U2.Astheappermovesthepressuredropthroughthenozzleissensedbythe

amplierrelay.Theamplierrelayoutputsasignal(O)totheactuatorwhichisproportionaltothe

pressuredropthroughthenozzle.

Astheactuatormoves,connectinglever(8) causes a change in tension of the reaction spring (6).

Thistensionisappliedtotheappercausingittomovetoanewpositionatwhichtheforcesapplied

by the spring and the applied pressure (I) balance.

Important:Thisinstrumentbleedsairinnormaloperationatarateofapproximately0.7N

m³ / hour at a supply pressure of 6 bar.

Fig. 1

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3. Installation

Note: 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.AlsorefertotheseparateInstallationandMaintenanceInstructionsforthecontrolvalve

and actuator.

3.1 Location

Thepositionershouldbemountedinsucientspacetoallowremovalofthecoverandprovide

accesstoconnections.Whenttingtoanactuator,ensurethepositionerwillnotbeexposedtoan

ambient temperature outside the range -15°C to +65°C. The positioner enclosure is rated to IP54

seeBSEN60534-6-11998.

Connectionofairsupplypressure(1.4to6barg)andcontrolsignal(4-20mAor0-10Vdc)should

be considered prior to choice of location.

3.2 Mounting the positioner onto the actuator

TheEP5positionermayhavebeensuppliedalreadyfactoryttedontothevalveactuator.However,

using the mounting kit provided it can be attached retrospectively onto any other type of valve and

actuatorconformingtoNAMURstandards.

Step 1 Identify actuator type

Forcorrectoperationitisimportanttoknowtwofactorswhichwillaectoptimummovementofthe

positioner feedback mechanism:

- Thedistancebetweentheaxesofthevalve/actuatorstemandthepositionerslidepin.

- The travel of the valve actuator.

To ensure these are set correctly, please note the following:

- WhenattachinganEP5toanySpiraxSarcovalveactuator,ignoreStep3.

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

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Step 2 For attachment to Spirax Sarco actuators

Usingthe2oM6panheadscrews,securelyattachthe'T'shapedslidingpinholdertothevalve

actuatorcouplingblock(Figure2).ApplyLoctitetotheslidingpinandscrewintohole'Y'(asshown)

on the sliding pin holder and tighten.

Usingthe2oM8x15hexheadscrewsand8mmspringwashers,attachthemountingplatetothe

backofthepositioner,utilisingholesNo.2inthebracket(Figure3).Takecarenottoover-tighten

thesescrewsandstripthethreads.

Step 3 For attachment to non-Spirax Sarco actuators

Usingthe2offM6panheadscrews,securelyattachthe'T'shapedslidingpinholdertothevalve

actuatorcouplingblock(Figure2).Dependingonthetravelofthevalveactuator,applyLoctiteto

slidingpinandscrewintothecorrectholeontheslidingpinholderandtighten.UseFigure2and

Table 1 to determine the correct hole to use.

Fig. 2

Close-up of

sliding pin holder

fitted to valve

coupling.

Fig. 3

Valve travel Hole to be used

 8-15mm X

 15-30mm Y

 above30mm Z

Table 1

Usingthe2offM8x15hexheadscrewsand8mmspringwashers,attachthemountingplate

to 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.

Valve

actuator

coupling

block

'T'shaped

sliding pin holder

Positioner

Mounting plate

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Fig. 5

Table 2

D Hole to be used

 Upto125mm 1

 125to150mm 2

150to175mm 3

above 175 mm 4

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

Actuator

spindle

Actuatorpillar

or yoke

100%

50%

Valve

position

indicator

Slide pin

Step 4 Temporarily apply adequate air pressure directly into the actuator so that the valve is

at50%oftravel(Figure5).

Step 5Engagetheslidepinintothepositionerlever(seeFigure5,notingthepositionofthe

spring,abovethepin)andlooselyxthepositionertotheactuator.Foryokeactuatorsusethesin-

gleelongatedscrewholewiththeM8x20screwandspringwasher,forpillarsusetheU-clamps.

Important:Slidepositionerverticallyupordowntheyoke/pillarssothepositionerleverishorizontal

at50%travel,andtheindicatoratLHSisaligned(Figure5).Securethetighteningscrews/nuts.

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Step 6Fittheangledprotectionplatetotherearofthepositionerusingthe2ocaptiveM3pan

headscrews.Accesstothesecaptivescrewsisfrominsidethepositioner.

Step 7 Adjusttheairsupplypressuretostroketheactuatorfrom0%to100%andensurethe

positioner lever rotates freely. Remove the temporary air supply from the actuator.

Step 8 Fitting a gauge block (optional)

ToaidcommissioningitisrecommendedtotagaugeblockandpressuregaugestoallEP5s.Please

note that gauges and gauge block can be supplied as spare parts if required.

FitgaugestotheblockbeforeattachingtheblocktotheEP5.Usethreadsealanttoensureairtight

connections.TheuppergaugedisplaystheoutputoftheI/Pconverter,andisnormally0-2barg.The

lowergaugedisplaysthepositioneroutputpressure,sothegaugerangewilldependontheactuator.

RemoveanyairttingsandblankingplugfromtheEP5,thenattachtheassembledblocktotheEP5

usingthe2osocketheadcapscrewssupplied.Ensurethesealing'O'ringsarecorrectlyttedto

sealthejointsbetweentheEP5bodyandthegaugeblock.Replacethettingsandblankingplug

into the corresponding ports on the gauge block.

3.3 Connecting up

3.3.1 Pneumatic connections (with or without a gauge block)

Warning:Airsupplymustbedry,oilanddustfreetoISO8573-1:class2:3:1.Acoalescinglter

regulatorsuchasaSpiraxSarcoMPC2willremoveoilanddirttomeetthisstandardifpro-

perlyttedandmaintained.Dirtyairsupplymaydamagetheproductandinvalidatewarranty.

The supply air pressure must not exceed the maximum allowable air pressure of the actuator.

Avoiduseoffer rouspipeworkaf tert heM PC2.Forbestper formanc e,settheairsupplypressure

toabout0.5bargabovethepressurerequiredtofullytraveltheactuator.

Chec kallco nnec tionsfo rleaks.Pleas en otehowevert hattheEP5blee dsairinnor maloper ation

atarateofapproximately0.7Nm³/hour at 6 bar supply pressure.

PneumaticconnectionsarelocatedattherighthandendofthepositionerandidentiedI, S

and Oasfollows:

I - NotusedonEP5,t¼" NPT plug.

S - Airsupply-1.4bargto6barg,dependinguponrequiredactuatorspringrange.

O - Outputsignaltotheactuator.

Connections are ¼"NPTfemale. Interconnectionbetweenpositioner andactuator shouldbeat

least6mmODtube.

3.568.5275.226

3.3.2 Electrical connections

CablingshouldbeinstalledinaccordancewithBS6739-InstrumentationinProcessControlSy-

stems: Installation design and practice or local equivalent.

TheEP5onlyrequiresa4-20mA(standard)or2-10Vdc(ifrequested)signal.Removethefront

coverandlocatetheterminalblockandearthterminalpost(Figure6).

Note:Ensureresistancefromearthposttolocalearth(e.g.pipework)islessthan1Ω.

ConnectiontotheunitisthroughthePg13.5cablegland(assupplied),whichwhenusedwithsuitable

cablewillensuretheIP54protectionrating.Appropriateconduitconnectionsmaybeusedinstead.

Connectconductors(0.5to2mm²)totheterminalblockandearthpost(3mm²)notingthepolarity

+/-showninFigure6.

InhazardousareasusemodelISP5withintrinsicprotection(typeEExiallCT6,T5,T4)ensuringthe

powersupplyfromadjoiningequipmentiscertiedinaccordancewithEN50.014andEN50.020

standards,inrespectofthelimitsofelectricfeaturesshownatapprovalstage.Refertoapproval

certicatesuppliedwitheachISP5product.

Fig. 6

Cable

gland

Terminal

block

Earth

terminal

post

3.568.5275.226

4. Commissioning

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

Step 1 Set the valve action

Establishingthecorrectactionofthevalveisdoneby:

a. ConnectiontoeitherU1orU2nozzles(seeFigure7)and

b. Settingthesliderintheupperorlowerportionofthecrescentshapedsectorlever(Figure8).

U1 = Increase action = Withincreasingelectricalcontrolsignaltheairpressuretotheactuator

willincrease.

U2 = Decreaseaction = Withincreasingelectricalcontrolsignaltheairpressuretotheactuator

willdecrease.

To change the working nozzle connections (U1 or U2):

Disconnecttheairsupply.Loosentheretainingplateandrotateitclearofthetubeholder.Pull

the tube holder clear of its seat and re-insert the tube holder into the alternative seat location.

Lockinplacewithalternativeretainingplate(lockunusedretainingplatetopreventlossofplate).

Reconnect air supply.

Fig. 7

Connection

tonozzleU2

Connection

tonozzleU1

3.568.5275.226

To change the slider location:

RefertoFigure8todeterminethecorrectportion.Tochangethesliderslackenthescrewandslide

it into the correct portion of the arm.

*Thearrowshowsthestemmovementdirectionwhentheinputcontrolsignalincreases.

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

Upper

sector

Upper

sector

Lower

sector

Lower

sector



U1nozzle



U2nozzle



U2nozzle*



U1nozzle

3.568.5275.226

Step 2 Set sensitivity

Thepositionersensitivityisadjustedusingthesensitivityscrew(Xp%,seeFigure10).Itissetde-

pending on air supply pressure. Before the commissioning stage it is essential to set the sensitivity

withinaproportionalbandof(3%to6%).UseFigure10toadjustthesensitivityscrewbyrstlyfully

closingthescrew(clockwise),thenreopenthescrew:-

Supply pressure (S) 1.4 bar -

Screwopen

¾ of a turn

4.0bar -

Screwopen

¼ of a turn

6.0bar - Screwopen

of a turn

Note: AdjustmentoftheXp%screwcausesachangeofpositioner'zero'point,anditistherefore

importanttorepeatthezeroingandtravelsettingprocedures(Steps4and5)afteranychanges.

Toincreasepositionersensitivityclosetheadjustingscrew,todecreasesensitivityopenthescrew.

Do notopenthescrewbeyondthemechanicallock.

Fig. 9

Fig. 10

Xpcorrectvalue

Openingdegree

1.4 bar

4.0bar

6.0bar

(Xp%)

Supply pressure

Sensitivityscrew

3.568.5275.226

Step 3 Set damping

Thenal adjustmentofdampingscrew shouldbeperformed withplantin operation,inorder to

limit,ifnecessary,theactuationspeed.Duringthecommissioningsetthedampscrewushwith

the body see Figure 11.

Thereductionofairowratecapacitytotheactuatorwillslowdownthevalvemovementtolimitthe

eectofcyclinghunting.Closingthescrew(clockwise)increasesdamping,andviceversa.

Step 4 Set zero point

Check all air and electrical connections are in place. Check air supply pressure (S)iscorrect(see

Section3.3.2).Checkelectricalcontrolsignal(A)(seeSection3.3.3)isattheminimumrequired

(normally4mAor0V),buttheapplicationmayrequireadierentsetting.Itmayalsobeadvisable

toincreasetheminimumby0.5mAor0.25Vtoensurethevalveiscompletelyclosed.For3-port

valves(oriftheactionhasbeenreversedfor2-portvalves)ahigherelectricalsignalcorresponds

totheclosedvalveposition,itmaybebenecialtodecreasethemaximumelectricalcontrolsignal

to19.5mAor9.75V.Thiswillensurethatthevalveisrmlyseatedwhenthefullelectricalsignal

of20mAor10Visapplied.

Locatezeropointadjustmentscrew(seeFigure12)andreleasethelockingring.Adjustscrewuntil

thevalvestartstomoveandlocktheadjusterinplace.

Checkthezeropointbyreducingtheelectricalcontrolsignal(A)(seeSection3.3.3)tozero.Slowly

increasetheelectricalcontrolsignaltowardstheminimumlevelwhilstmonitoringvalvemovement.

Shouldmovementtakeplacebeforeoraftertheminimumcontrolsignalthenrepeatadjustment

untilmovementcoincideswithminimumcontrolsignal.

Fig. 11

Dampscrew

Fig. 12

Slider

Lockingring

Zero point

adjustmentscrew

Sector lever

Centrallockingscrew

Note:Positionersfittedwithagaugeblockhavethebenefitofanticipatingvalvemovementby

indicating increases of output air pressure.

3.568.5275.226

Step 5 Set travel

Increasetheelectricalcontrolsignaltotheuppervalue(normally20mAor10V,butthisdependson

theapplication)andnowcheckthetravelofthevalve.Ifrequired,slackenthecentrallockingscrew

(seeFigure12)andadjustthesliderupordowntheupperorlowerportionofthecrescentshaped

sectorlever.Movingthesliderawayfromthepivotwillreducethetravel,andviceversa.Normally,

exceptwith3-portvalves,thefullyopenpositionisachievedbeforethevalveplughitstheupper

mechanicalstopofthevalve/actuator.Avoidsettingsofthepositionerthatallowcontactwiththis

mechanicalstop.Varytheelectricalcontrolsignalaroundtheuppervaluetoverifythetravelsetting,

andifnecessaryrepeattheadjustmentoftheslideruntiltherequiredtraveloccursattheuppervalue.

Important:ZeroandtravelsettingsonEP5arenotindependentofeachother,sore-checkthezero

setting as described in Step 4. It may prove necessary to repeat Steps 4 and 5 several times until

acceptablezeroandtravelsettingsareachieved.Forneadjustmentofthetravel,thepotentiometer

showninFigure13canbeused.Thisshouldonlybeusedfornaladjustmentof+/-5%.

Whencomplete,lockbothzeroandtraveladjustments.

Split range operation

EP5maybesplitrangedtosequentiallyactuatetwovalvesfromonecontrolsignal

(Forexample:valve1setto4-12mAandvalve2setto12-20mA).Splitrangingisachieved

byadjustmentofthezeroandtravelsettingsrefertoSteps4and5.

Fig. 13

Traveladjustment

potentiometer

3.568.5275.226

5. Maintenance

5.1 Regular maintenance

1. Drainanybuild-upwithintheairsupplyltersetasimpuritiessuchasoil,wateranddirt

 willcauseinconsistentoperation.

2. Ensureairsupplyisatthecorrectpressure(seeSection3.3.2andrefertoactuatorTI).

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):

- Loosenandremovelock.

- Notesettingthenremovesensitivityscrew.

- Washadjusterwithsolvent,checkingconditionoftheconeandensuring0.35mmside

hole is clear.

- Drywithcleancompressedairtoensurenoremainingcontaminants.

- Retthecleanedadjusterandunscrewit1turnfromitsstop.

- Retthelocktotouchtheadjustertopandsecurewithlock-nut.

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

- Resetzeroandspanifrequired.

Fig. 14

3.568.5275.226

5.2.3 Check damping grease:

- Ensuregapof1mmexistsbetweenfacesofdamper.Adjustifnecessary.

- Verifygreaseispresentbetweenfaces.

- Replacegreaseifnecessary(contactSpiraxSarcofordetails).

5.2.2 Removalandcleaningofcapillaryorice (see Figure 15):

- Loosenlockingplatescrew.

- Rotatelockingplatetoexposecapillaryorice.

- Usingsuppliedextractor/cleanerpulltheoricefromthebody.

- Cleanthesmalloriceandcrossdrillingusingonlythespecialcleaningwiresupplied.

- Reassembletheoriceensuringboth'O'ringsareinplaceandthelockplatecoverstheorice.

Fig. 16

Lockingplate

Capillary orifice

Dampingfaces

Capillary extractor /cleaner

Fig. 15

Extracting

thread

Cleaningwire

Extractor/cleaner

Capillary orifice

Spare'O'ring

3.568.5275.226

6. Spare parts

Available spares

Gaugeblock(withoutgauges) 1

Gauge0-2bar 2

Gauge0-4bar 3

Gauge0-7bar 4

Springs and tubes 5

Set of gaskets, diaphragms and orifice 6

Amplifyingrelayset 7

How to order spares and accessories

Always order spares by using the description in the column headed 'Available spares' and a

descriptionoftheproduct,togetherwiththeTAGnumber.

Example:1offGauge0-2barforaSpiraxSarcoEP5positioner,TAG907.

Product return procedure

Pleaseprovidethefollowinginformationwithanyequipmentbeingreturned:-

1. Yourname,Companyname,addressandtelephonenumber,ordernumberandinvoice

and return delivery address.

2. Descriptionofequipmentbeingreturned.

3. Descriptionofthefault.

4. Iftheequipmentisbeingreturnedunderwarranty,pleaseindicate:

i. Dateofpurchase

ii.Originalordernumber

Please return all items to:

ReturnsInvestigationsDepartment

Runnings Road,

KingsditchTradingEstate

Cheltenham

Glos,GL519NX

UnitedKingdom

Alternatively, please return any items to your local Spirax Sarco branch.

Pleaseensureallitemsaresuitablypackedfortransit(preferablyintheoriginalcartons).

Fig. 17

3 or 4

TAGnumber

3.568.5275.226

7.Faultnding

Output pressure too low or zero

Cause Remedy

a. No control signal a.RestoremAsignal

b.Lowairsupplypressure b.Verifyactuatorairpressurerequirement

c.Cloggedordirtysensitivityadjuster c.CleanadjusterseeSection5.2.1

d. 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.Damagedpneumaticactuatororpiping f.Verifyreplaceasnecessary

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

Output pressure too high

Cause Remedy

a.Sensitivityadjusteropentoofar a. Recalibrate see Section 4, Step 2

Actuator movement too slow

Cause Remedy

a.Lowairsupplycapacity a.Checksupplycapacityandpipesizes

b.Dampingscrewclosedtoofarorclogged b. Recalibrate see Section 4, Step 3

Actuator failing to close

Cause Remedy

a.Outputpressuretoolow a. Refer to previous fault

b.Incorrectzeropoint b. Recalibrate see Section 4, Step 4

c.Dampingscrewclosedorclogged c.CleanscrewandrecalibrateseeSection 4, Step 3

d.Valve / actuatorcouplingincorrect d.Reset(refertovalve/actuatorIMIs)

e.Actuatortoosmall e. Fit correct actuator

Actuator failing to fully open valve

Cause Remedy

a.Outputpressuretoolow a. Refer to previous fault

b.Incorrecttraveladjustment b. Recalibrate see Section 4, Step 5

c.Dampingscrewclosedorclogged c.Clean screw andrecalibrateseeSection 4,Step 3

d.Valve /actuatorcouplingincorrect d.Reset(refertovalve/actuatorIMIs)

e.Actuatortoosmall e. Fit correct actuator

Hunting

Cause Remedy

a.Incorrectcontrollersetup(P, I, and D) a.Verify and adjust accordingto process requirement

b. Sensitivity orifice closed too far b.Adjustbyopeningsensitivityscrew 

see Section 4, Step 2

c.Excessivevalvefriction c.VerifyandmaintainasvalveIMI

d.Controlvalveover-sizing d. Verify operating conditions againstvalve capacity.

Note:Theeffectsofhuntingcausedbyvalveover-sizingorunstableprocessconditionscanbe

reducedbyadjustmentofdampingscrewseeSection4,Step3. 

3.568.5275.226

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Spirax Sarco EP5 Series Installation And Maintenance Instructions Manual

Brand: Spirax Sarco

Model: EP5 Series

Type: Installation And Maintenance Instructions Manual

This manual is also suitable for

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Spirax Sarco EP5 Series Installation And Maintenance Instructions Manual

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Spirax Sarco EP5 Series Installation And Maintenance Instructions Manual

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