Comeval Diaval AF Series Installation guide

©COMEVAL VALVE SYSTEMS Technical Dept. Ref. IOM - PNEUMATIC ACTUATORS AF SERIES - Ed.20/11
Comeval Valve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly updated data on www.comeval.es
COLUMNLESS PNEUMATIC ACTUATORS AF SERIES
FOR DIAPHRAGM VALVES
Page 1
INSTALLATION, OPERATING
AND MAINTENANCE MANUAL
COLUMNLESS PNEUMATIC ACTUATORS
FOR DIAPHRAGM VALVES AF SERIES
Contents
Diaval® AF Series
1. GENERAL INFORMATION ON THE MANUAL............2
2. NOTES ON POSSIBLE DANGERS .............................2
2.1Signicanceofsymbols ..............................................2
2.2 Explanatory notes on safety information.....................2
3. PRESERVATION, STORAGE, HANDLING &
TRANSPORT ......................................................................2
4. DESCRIPTION..............................................................2
4.1 General Description / Operating principles .................2
4.2 Principle of Operation .................................................3
4.3 Area of Application ......................................................3
4.4 Technical data – remarks ............................................3
4.5Marking/labelling .........................................................4
5. INSTALLATION ............................................................4
5.1 General remarks on installation ..................................4
5.2Assemblyoftheactuatorontodevalve: .....................4
5.3Assemblingadditionalmodules ..................................4
5.4 Requirements at the place of installation ....................4
6. COMMISSIONING & OPERATION...............................5
7. CARE AND MAINTENANCE........................................5
8. TROUBLESHOOTING..................................................7
9. TROUBLESHOOTING TABLE .....................................7
10. DISMANTLING THE ACTUATOR ..............................8
11. GOODS RETURN & DISPOSAL ...............................8
12. WARRANTY / GUARANTEE......................................8
13. PARTS LIST ...............................................................9
14. ANNEXES.................................................................10
14.1 Declaration of Conformity - DC09...........................10
14.2 Data Sheet - DS09..................................................10
Double Acting
Single Acting
Spring closes
Single Acting
Spring opens

©COMEVAL VALVE SYSTEMS Technical Dept. Ref. IOM - PNEUMATIC ACTUATORS AF SERIES - Ed.20/11
Comeval Valve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly updated data on www.comeval.es
COLUMNLESS PNEUMATIC ACTUATORS AF SERIES
FOR DIAPHRAGM VALVES
Page 2
1. GENERAL INFORMATION ON THE MANUAL
-ThisManualprovidesinformationonsafelyusingtheproduct,beingbindingforpreservation,storage,handling,transport,
installation,commissioning,operation,maintenance,repairanddisposal,andmustbethoroughlyobservedatanystep.
-PleasecontactthesupplierorthemanufacturerincaseofissueswhichcannotbesolvedbyreferencetothisManual.
-AnydeviationfromthisManualandsoundengineeringpracticeormodicationontheproductshallbenotiedtomanufacturer
for advice or approval.
-Inaddition,regionalsafetyrequirementsmustbealwaysappliedandobservedatanystep.
-Alltheworkrelatedtotheproductmustbecarriedout,supervisedandinspectedbyspecialistpersonnel.Itistheowner’s
responsibilitytodeneareasofresponsibilityandcompetenceandtoensurethepropermonitoring.
- This Manual is in accordance with Machinery Directive 2006/42/EC.
-Themanufacturerreservestherighttomaketechnicalmodicationsatanytime.
2. NOTES ON POSSIBLE DANGERS
2.1 Signicanceofsymbols
ATTENTION!
...
Warning of general danger.
2.2 Explanatorynotesonsafetyinformation
In this Manual dangers, risks and items of safety information are highlighted to attract special attention.
Informationmarkedwiththe symbolabovedescribes practices,whichiffailtocomplywith, canresultin seriousinjuryor
danger of death for users or third parties or in material damage to the system or the environment. It is vital to comply with
these practices and to monitor compliance.
TherestofinformationnotspecicallyemphasizedinthisManual,alongwithDataSheetandproductmarking,mustalsobe
observedandcompliedwithforsafelyusingtheproduct.
3. PRESERVATION, STORAGE, HANDLING & TRANSPORT
ATTENTION!
- Protect against external force (impacts, vibrations, etc.).
- Allow only skilled personnel; suitable handling and lifting equipment must be used. See Data
Sheet for weights or consult manufacturer.
- Always use suitable protection equipment, and minimize the use of human body force at any step
to avoid injuries.
- Special arrangements must not be used to take up external forces that they are not designed for:
e.g. do not use them as climbing aids, or as connecting points for lifting gear, etc.
-Thereisariskofbodymember(hand,nger,arm…)crushedagainstanyothersolidelement
(wall,pipe,oor,etc.)duringhandling.Takethisintoaccountandhandlewithcare.
- Use sling properly sized for the weight and in good condition.
- Additional means should be considered to hold the weight of the valve.
- Do not drill additional holes on the actuator to add eyelets.
- Avoid abrupt movements or pulls while lifting.
- There is a risk of body member injury in case there is any exposed moving part between actuator and special
arrangements. Take appropriate measures and set warning notes when required.
- Use proper packing for transportation.
-Keepstorageprotectionbeforeinstallation.
-Keep the actuators in its steady position, without energy source applied.
- In order to prevent damage, corrosion or rust on the surface, avoid extreme temperatures (keep at 5ºC to 50ºC), avoid high
environmentalhumidityorcorrosiveenvironment.Keeptheactuatorsawayfromdirectsunlight,dust,amesorrain.
-Donotleaveactuatorsdirectlyontheoor.
-Makesureconnectionsareprotectedbyplugs.
- In case of long storage, operate on complete cycle open and close every 6 months with clean air under maximum air supply
pressure.
-Donotpileupexcessiveweight.Incaseofseverebumpinginspectthematerialforanydamageandreplaceifnecessary.
4. DESCRIPTION
4.1 GeneralDescription/Operatingprinciples
Thesepneumaticactuatorsarelineardoubleactingorspringreturn,designedforactuationofweirtypeandstraightthrough
typediaphragmvalves.AFactuatorsenjoyalongandmaintenancefreelife.

©COMEVAL VALVE SYSTEMS Technical Dept. Ref. IOM - PNEUMATIC ACTUATORS AF SERIES - Ed.20/11
Comeval Valve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly updated data on www.comeval.es
COLUMNLESS PNEUMATIC ACTUATORS AF SERIES
FOR DIAPHRAGM VALVES
Page 3
4.2 PrincipleofOperation
Singleacting,springreturn,normallyclosedactuator
air inlet
Whenthelowerchamberispressurelessthespringforcesthevalve’sstemdowntoclose.Ifthelowerchamberhasenough
airpressuretocounterthespring’sforce(basedonlimitrodscrewssetup)andthepipelinediferentialpressure,thediaphragm
upper plate pushes up the spring and therefore the valve opens.
Singleacting,springreturn,normallyclosedactuator
air inlet
Whentheupperchamberispressurelessthespringforcesthevalvetoremainopen,the%ontheopeningcouldbeeasily
adjustedbyusingthehandwheelwhichactuatedirectlytothestemextension.Whentheupperchamberhaveenoughair
pressuretocounterthepressureofthelineandthespring’sforce,theairpushthediaphragmdownwardsandthispullthe
stem extension with it forcing the valve to close.
Doubleacting
air inlet
air inlet
Whentheupperchamber’sairpressureisenoughtoallowthevalvetoclose,theairpushesthediaphragmdownwardsand
soitactuatesdirectlyonthevalve’sstemforcingthevalvetoclose.Whentheairpressureinthelowerchamberisenoughto
allow the valve to open, the diaphragm push upwards the stem and so the valve open.
4.3 AreaofApplication
Diaval®AFactuatorshavebeendesignedtoautomatizediaphragmvalvesinstalledonpipelinesforliquidsorgasessuitable
for the valves.
4.4 Technicaldata–remarks
Checkinstallationarea’sspecial requirements,air supplyand temperaturelimitsand otheressential parameters.Ensure
proper safety devices/measures are implemented to prevent exceeding intended use of the product. Refer to Data Sheet for
data such as main features, duties/limits of use, dimensions, weights, etc. and consult the manufacturer for further information.
Bearinmindthatforthecorrectoperation,apneumaticactuatormustbesizedadequatelyandwithsu󰀩cientsafetymargin
of thrust output for the correct operating conditions of the valve.
Spring return actuators are equiped with visual indicator rod.

©COMEVAL VALVE SYSTEMS Technical Dept. Ref. IOM - PNEUMATIC ACTUATORS AF SERIES - Ed.20/11
Comeval Valve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly updated data on www.comeval.es
COLUMNLESS PNEUMATIC ACTUATORS AF SERIES
FOR DIAPHRAGM VALVES
Page 4
4.5 Marking/labelling
Labellingdescriptionofthevalve:
Dimensions in mm. subject to manufacturing tolerance
Dimensiones en mm. sujetas a tolerancias de fabricación
PRODUCT COMPLIANT WITH PRESSURE EQUIPMENT DIRECTIVE PED, MAX. CATEGORY I/
PRODUCTO CONFORME A LA DIRECTIVA DE EQUIPOS A PRESIÓN PED, MÁX. CATEGORÍA I
Data subject to alteration due to continuous improvement. Regularly updated data on www.comeval.es
Sujeto a cambios debido a la mejora continua de nuestros productos. Datos regularmente actualizados en www.comeval.es
Description/Descripción
JG
Rev.201103
03/11/2020
aes40557
PNEUMATIC_ACTUATORS-AF-DIAVAL-NAMEPLATE-EN-MNP09AF
CR
AF ACTUATOR NAMEPLATE
DT 03/11/2020
DIAVAL
Customer/Cliente Project/Proyecto
--
- -
Our Ref./Nuestra Ref.Your Ref./Su Ref.
Date/Fecha
Name/Nombre
Drawn/Dibujado Approved/Aprobado Checked/Comprob. Date/Fecha
Drawing N°/Plano N°
CAUTION
DO NOT OPERATE THE VALVE BY AIR PRESSURE AND
BY HANDWHEEL SIMULTANEOUSLYAS IT MAY DAMAGE
THE INTERNAL PARTS. DO NOT APPLY MORE AIR
PRESSURE THAN THE SPECIFIED. EXCESS PRESSURE
MAY DAMAGE THE ACTUATOR DIAPHRAGM
ACT MODEL:
VALVE SIZE:
BODY/LIN:
DIAPHRAGM:
TAG NO:
ACT. INLET AIR PR:
MAX WORKING PR:
ΔP:
SL.NO:
Mark Description
Dimensions in mm. subject to manufacturing tolerance
Dimensiones en mm. sujetas a tolerancias de fabricación
PRODUCT COMPLIANT WITH PRESSURE EQUIPMENT DIRECTIVE PED, MAX. CATEGORY I/
PRODUCTO CONFORME A LA DIRECTIVA DE EQUIPOS A PRESIÓN PED, MÁX. CATEGORÍA I
Data subject to alteration due to continuous improvement. Regularly updated data on www.comeval.es
Sujeto a cambios debido a la mejora continua de nuestros productos. Datos regularmente actualizados en www.comeval.es
Description/Descripción
JG
Rev.201103
03/11/2020
aes40557
PNEUMATIC_ACTUATORS-AF-DIAVAL-NAMEPLATE-EN-MNP09AF
CR
AF ACTUATOR NAMEPLATE
DT 03/11/2020
DIAVAL
Customer/Cliente Project/Proyecto
--
- -
Our Ref./Nuestra Ref.Your Ref./Su Ref.
Date/Fecha
Name/Nombre
Drawn/Dibujado Approved/Aprobado Checked/Comprob. Date/Fecha
Drawing N°/Plano N°
CAUTION
DO NOT OPERATE THE VALVE BY AIR PRESSURE AND
BY HANDWHEEL SIMULTANEOUSLYAS IT MAY DAMAGE
THE INTERNAL PARTS. DO NOT APPLY MORE AIR
PRESSURE THAN THE SPECIFIED. EXCESS PRESSURE
MAY DAMAGE THE ACTUATOR DIAPHRAGM
ACT MODEL:
VALVE SIZE:
BODY/LIN:
DIAPHRAGM:
TAG NO:
ACT. INLET AIR PR:
MAX WORKING PR:
ΔP:
SL.NO:
Series AF mark
ACTMODEL: Actuator model
VALVESIZE: Assembledvalve’ssize
BODY/LIN Materialofbody+lining
DIAPHRAGM Diaphragm’smaterial
TAGNO.: Tagnumber
ACT.INLETAIRPR.: Maxallowablesupplypressuretoactuator
MAXWORKINGPR.: Maxallowablepipelinepressure
DP: Pipelinediferentialpressure(%)
SL.NO.: Serialnumber
5. INSTALLATION
5.1 Generalremarksoninstallation
Thefollowingpointsshouldbetakenintoaccountinadditiontothegeneralprinciplesgoverninginstallationwork:
ATTENTION!
- Before installation, make sure previous chapters are thoroughly followed.
- Ensure safe access and working conditions for proper performance.
- Remove any remaining packing/storage protection if present.
-Do not remove holding devices until the whole set of actuator and valve is rmly attached and in rest position /
installed on the pipe line.
- When the valve is operated, there is a crushing hazard between diaphragm and seat. Ensure the valve is not under
operation in case hands are introduced inside the valve.
- To avoid unnecessary stress and risk of valve break, consider the weight and the relative position of actuator to
evaluate its support. Make sure that the actuator is suitable for service particular requirements, valve adaptability,
function needed, adequate torque for the valve, adequate speed, need for limit switches, etc. Contact our Technical
Department for advice. Disconnect the air supply before starting work.
5.2 Assemblyoftheactuatorontodevalve:
-Verifythecouplingdimensionsofthevalveangeandstemmatchwiththebonnetcouplingdimensions.
-Cleanthecouplingangeofthevalveandremoveanyremanentofsusbstanceswhichpreventadherencetothebonnet.
Makesurethecouplingpartsarefreeofburrsanddirt.
-Applygreasetothestemtoeaseassemblyandensureproperttingwithoutexcessiveplayandwithoutneedofexternal
force.
-Attention!mindyourhands,riskoftrappingduringassembly.
-Thevalveshouldbeproperlyanchoredbeforeassemblyoftheactuator.Preferrablepositionduringassemblywithstem
upwards to ease actuator handling.
-Ensurethecouplingisproperlytightened,accordingtoboltingused.Designandtighteningofanchoringmustbedenedby
theresponsiblefortheassembly,andtakeintoaccountthecircumstancesduringoperation(i.e.vibrations).
Pneumaticconnection:
-Airsupplymustbeproperlycleanedandsupplypipingwellcleaned.
-Sizesofpipesandttingsmustbechosenaccordingtolayoutandhaveaninuenceintheactuatorspeed.Pneumaticpipes
tobeproperlyshapedandconnectedtopreventstressorowrestriction.
- Attention! There is an exhaust of air from actuator during operation.
5.3 Assemblingadditionalmodules
Optionalaccessories(limitswitchesbox,positioners,etc.)thataresuppliedwithactuatorsmustbettedasrequiredfortheir
functions as shown in the system plan.
5.4 Requirementsattheplaceofinstallation
- Aggressive environmental conditions may reduce the life span of the product. Consider special construction/protective
measures in such a case.
-Considertheinteractionbetweenthesystemandtheequipment.Foreseeelementstoabsorbvibrations,pipedilatations,
guides, anchoring and proper support according to the weight of the components.
-Floodingoftheproductisforbidden.
- Allow enough space for actuator installation, operation and maintenance.
-Planners/constructioncompaniesortheownerareresponsibleforpositioningandinstallingproducts.

©COMEVAL VALVE SYSTEMS Technical Dept. Ref. IOM - PNEUMATIC ACTUATORS AF SERIES - Ed.20/11
Comeval Valve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly updated data on www.comeval.es
COLUMNLESS PNEUMATIC ACTUATORS AF SERIES
FOR DIAPHRAGM VALVES
Page 5
6. COMMISSIONING & OPERATION
ATTENTION!
- Before commissioning the actuator check the pneumatic supplied medium composition and the supplied pressure /
power supplied if any electrical arrangement is present. Always use the product within the scope of intended service
and operating duties according to product label and Data Sheet. Operating media: clean, dry or lubricated compressed
air, max. particle size under 30 µm.
- Ensure all equipment and accessories are under correct specication and properly assembled, adjusted and
connected.
- Before commissioning, make sure previous chapters are thoroughly followed.
- Regional safety instructions should be adhered to.
-Itisessentialtoushthepneumaticsupplypipelinethoroughlytoeliminatealltheparticlesandimpuritieswhichcould
remain.
-Beforecommissioninganewplantorrestartingitafterrepairsormodication,alwaysensurethat:
- All work has been completed correctly.
- Safety devices/measures have been implemented.
- Keep the surfaces properly cleaned from dust and debris.
- Possible hot surfaces. Wear protective gloves. Avoid standing near the equipment.
- Possible high noise. Wear ear protections. Avoid standing near the equipment
-Potentialuidejection.Fittingstobeproperlytightenedandsealed.Protectincaseoftoxicordangerousmedia.
Avoid standing near the equipment.
- Prevent uncontrolled movement of the actuator that could hurt operators nearby in case of external accessible
moving parts such as connecting parts or indicators. Avoid standing near the equipment.
- Ensure actuator surface is in good condition and retouch coating protection when needed.
-Oncetheactuatorinstalled,makeaninitialopeningandclosingoperationtocheckitsproperoperability,withoutadditional
tools.
-Checknoleakagebetweenupperandlowerchamber.Ifso,slightlyandprogresivelytighttheunionboltsuntilleakageis
eliminated.
-Checknoleakageinthepneumaticconnectionsandttingsandretightenasrequired
- Check local and remote signals work properly, as well as actuator controls and valve.
7. CARE AND MAINTENANCE
Theoperatormustdenemaintenanceandmaintenance-intervalstomeetrequirements.
-Checkforbody,andairsupplyconnectionstightness,andvalvesmoothoperationwithoutadditionaltools.
ATTENTION!
- Before any maintenance task, make sure previous chapters are thoroughly followed.
- In case of actuator malfunction and cap screws loosened there is risk of internal parts external projection. Stop the
air supply in case of doubt.
- In the event of infrequent use, operate the valve as frequently as possible to avoid deposits of dirt and valve blocking.
- Before disassembling the actuator, note chapters 3, 10 & 12.
- Only carry out maintenance work in the actuator when it has been secured from operation by removing its pneumatic
supply / power supply if any electrical arrangement is present.
- Check the actuator surface and retouch coating protection when needed. If advanced corrosion or erosion is
observed, double check area conditions and replace the actuator or required parts accordingly.
-Special attention and precautions should be observed of the stored energy contained in the spring return pneumatic
actuators. Personal injury maybe happen when disassembly.
Normallyclosedactuatordismantlingformaintenance(seepartslistinChapter13)
1. Safely disconnect all electric power and supply lines connected to the actuator or accessories.
2. Disassemblealltheaccessoriesoftheactuator(solenoid,limitswitchbox,etc).
3. Remove the cotter pin on the stem extension and the nut on the stem extension.
4. Loosetheretainingallenscrewjustbelowthehandwheel.
5. Close the valve manually if needed in order to release the spring tension.
6. Markthepositionofthelimitopeningboltsandloosethemattheirmaximumheightinordertoreleasethespringtension.
7. Loosegraduallythespringchamber’slongboltstoreleasegraduallythespringtensionandremovethem.
8. Turn the handwheel clockwise to release the spring and keep turning it to dismantle the upper part of the actuator.
9. Remove the spring plate and the the spring.
10. Removethebetweenchambers’bolts.
11. Markthepositionoftheopeningindicatorinthelowerchamberandremovetheupperchamber.
12. Remove the retaining washers and the stem extension.
13. Removethediaphragmupperplate,thediaphragmandthebottomsuportplate.
14. Removethebonnet.
15. Clean the components of the actuator perfectly.
16. Inspect the components of the actuator for wear or damage and replace what is necessary.

©COMEVAL VALVE SYSTEMS Technical Dept. Ref. IOM - PNEUMATIC ACTUATORS AF SERIES - Ed.20/11
Comeval Valve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly updated data on www.comeval.es
COLUMNLESS PNEUMATIC ACTUATORS AF SERIES
FOR DIAPHRAGM VALVES
Page 6
Normallyclosedactuatorassemblyaftermaintenanace(seepartslistinChapter13)
Beforebeginningtheassemblycheckthediaphragms(bothvalveandactuator)andcheckthatallthecomponentsare
greased correctly using a standard commercial grease.
1. Assemblythebonnettothebodytighttenningtheboltsinacrosspatternway.
2. Placethebottomsupportplate(besurethepositionoftheplateallowtoplacethediaphragmrmly).
3. Placethediaphragmandholditrmlyintothebottomsupportplatehousing.Matchthediaphragmholeswiththelower
chamberholes.
4. Placethediaphragmupperplate(besuretheretainingwashers’housingislookingupwards).
5. Matchtheopeningindicatorpositiontothepreviouslymarkedinlowerchamber.
6. Attachthestemextensiontothevalve’sstemrmlyandplacetheretainingwasherstotheupperplate.
7. Placethespring,thespringplateandtheupperchamber.
8. Tightthebetweenchamber’sboltsandnuts.
9. Placetheupperpartoftheactuatorandturnthehandwheelanti-clockwiseuntilthespingchamber’slongboltscould
betighten.
10. Tightthespringchamber’sboltsgraduallyandsetthelimitopeningboltstotheirinitialpositions.
11. Releasethespringtoitsrestpositionbyturnthehandwheelclockwise.
12. Place and tight the nut on the stem extension and the cotter pin on the stem extension and lock it.
13. Tighttheallenscrewbelowthehandwheel.
Normallyopenactuatordismantlingformaintenance(seepartslistinChapter13)
1. Safely disconnect all electric power and supply lines connected to the actuator or accessories.
2. Disassemblealltheaccessoriesoftheactuator(solenoid,limitswitchbox,etc).
3. Turn the handwheel anti clockwise in order to release the spring tension.
4. Removethespringchamber’sboltsoftheupperpartoftheactuator.
5. Removetheboltsofthespringchamber.
6. Markthepositionofthevisualindicatoronbothchambersandthenremovethevisualindicatorandthestemextension’s
locking nut carefully .
7. Removethespringupperplate,thespringandthespring’sseat.
8. Removethebetweenchambers’bolts.
9. Removetheupperchamber.
10. Remove the retaining washers and the stem extension.
11. Removethediaphragmupperplate,thediaphragmandthebottomsuportplate.
12. Removethebonnet.
13. Clean the components of the actuator perfectly.
14. Inspect the components of the actuator for wear or damage and replace what is necessary.
Normallyopenactuatorassemblyaftermaintenanace(seepartslistinChapter13)
Beforebeginningtheassemblycheckthediaphragms(bothvalveandactuator)andcheckthatallthecomponentsare
greased correctly using a standard commercial grease.
1. Assemblythebonnettothebodytighttenningtheboltsinacrosspatternway.
2. Placethebottomsupportplate(besurethepositionoftheplateallowtoplacethediaphragmrmly).
3. Placethediaphragmandholditrmlyintothebottomsupportplatehousing.Matchthediaphragmholeswiththelower
chamberholes.
4. Placethediaphragmupperplate(besuretheretainingwashers’housingislookingupwards).
5. Attachthestemextensiontothevalve’sstemrmlyandplacetheretainingwasherstotheupperplate.
6. Placetheupperchamberandmatchtheindicatorpositionwiththelowerchamber.
7. Placetheseat’sspring,thespringandthespring’supperplate.
8. Screwthestemextension’sretainerandthevisualindicator,matchthevisualindicatorwiththemarksontheupperand
lowerchamber.
9. Placethespringchamberandtheupperpartoftheactuator.
Doubleactingactuatordismantlingformaintenance(seepartslistinChapter13)
1. Safely disconnect all electric power and supply lines connected to the actuator or accessories.
2. Disassemblealltheaccessoriesoftheactuator(solenoid,limitswitchbox,etc).
3. Removetheupperchamber.
4. Removethestem’slockingnut,theupperplate,thediaphragmandthelowerplate.
5. Removethebonnet.
Doubleactingactuatorassemblyaftermaintenanace(seepartslistinChapter13)
Beforebeginningtheassemblycheckthediaphragms(bothvalveandactuator)andcheckthatallthecomponentsare
greased correctly using a standard commercial grease.
1. Assemblythebonnettothebodytighttenningtheboltsinacrosspatternway.
2. Placethebottomsupportplate(besurethepositionoftheplateallowtoplacethediaphragmrmly).
3. Placethediaphragmandholditrmlyintothebottomsupportplatehousing.Matchthediaphragmholeswiththelower
chamberholes.
4. Placethediaphragmupperplate(besurethepositionoftheplateallowtoplacethediaphragmrmly).
5. Attach the locking nut to the stem.
6. Placetheupperchamber.

©COMEVAL VALVE SYSTEMS Technical Dept. Ref. IOM - PNEUMATIC ACTUATORS AF SERIES - Ed.20/11
Comeval Valve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly updated data on www.comeval.es
COLUMNLESS PNEUMATIC ACTUATORS AF SERIES
FOR DIAPHRAGM VALVES
Page 7
RecommendedSpareparts(see parts list in Chapter 13):
Use only original spare parts.
Itisadvisabletokeepparts15and8asspareparts.Typeandnumberofeachspareparttobestoredaccordingtomany
factors:servicelevel,actuators’quantity,etc.Inmanycasesagoodchoiceistokeepcompleteactuatorassparepart.
8. TROUBLESHOOTING
Intheeventofmalfunctionorfaultyoperatingperformance,checkthattheinstallationandadjustmentworkhasbeencarried
out and completed in accordance with this Manual.
ATTENTION!
- It is essential that the safety regulations are observed when identifying faults.
9. TROUBLESHOOTING TABLE
ATTENTION!
- Read the complete Manual before carrying out installation and repair work.
- Read chapter 6 before recommissioning.
FAULT POSSIBLE CAUSE CORRECTING MEASURES
Actuator unit
does not
move
Wrong air supply connection Check correct air supply connection
Connection opposite to air supply connection
(venting)ispluggedorblocked,notventing Discard this
No air supply pressure or too low Check air supply pressure
Actuator already reached limit position Check actuator position
Actuator manual device (handwheel) limiting the
operation
Release the manual handwheel to allow
pneumatic operation
Springbroken Check spring and replace if needed. Refer to
chapter 7
Some part stuck inside the valve Dismount the valve and check inside. Refer to
chapter 7
Actuator unit
moves too
slowly or not
reaching limit
position
Air supply pressure too low
Recheck air supply pressure on actuator
nameplate. Increase only the needful, without
exceeding max.value
Connection opposite to air supply connection
partially plugged or restricted Discard this
Signicantleakageonairsupplyline Correctleakage,retigthenttingsifneeded.
Refer to chapter 6
Air supply line restricted, solenoid valve or
positionnerobstructedorwronglyadjusted Check inlet air supply system
Actuator manual device (handwheel) limiting the
operation
Release the manual handwheel to allow
pneumatic operation
Actuatordiaphragmnotproperlyassembled(upper
andlowerchambercommunicated)
Ensure the diaphragm is well clamped in its
raised center to make tightness
Actuator diaphragm damaged (upper and lower
chambercommunicated) Replace diaphragm. Refer to chapter 7
Leakagebetweenupperandlowercase Retightenchambersunionboltsorreplace
actuator diaphragm. Refer to chapter 6 and 7
Too much pressure on the main line, medium to
viscous or with impurities Check working parameters
Springbroken Check spring and replace if needed. Refer to
chapter 7
External
air leakage
through
actuator
Leakagebetweenupperandlowerchamber Retightenchambersunionboltsorreplace
actuator diaphragm. Refer to chapter 6 and 7
Leakagefromupperorlowerchamber Retightenboltsorreplaceo-ringsinbonnet
and/orinspring’sseat.Refertochapter6and7
Actuator unit
moves too
quickly
Air supply pressure too high
Recheck air supply pressure acc. to actuator
nameplate. Set to the minimum necessary to
operate the valve

©COMEVAL VALVE SYSTEMS Technical Dept. Ref. IOM - PNEUMATIC ACTUATORS AF SERIES - Ed.20/11
Comeval Valve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly updated data on www.comeval.es
COLUMNLESS PNEUMATIC ACTUATORS AF SERIES
FOR DIAPHRAGM VALVES
Page 8
FAULT POSSIBLE CAUSE CORRECTING MEASURES
Valve is not
seat tight
Line pressure exceeding max. actuator closing
force
Check actuator selection or actuator spring
tensionadjustment
Notenoughairsupply(doubleactingorsingle
acting spring opens)
Check air supply pressure and increase only
as required to achieve tightness, without
exceeding max.air supply pressure on actuator
nameplate
Wrongadjustmentofpositionnerifexisting Checkcorrectadjustmentofpositionner
Valvebodywornoutorsomeparticlestuck
betweendiaphragmandbody
Checkvalvebodyinsidetodiscarddamages
on the sealing area or particles
Valve diaphragm damaged Check valve diaphragm to discard damages on
the sealing area
Actuator not correctly installed on to the valve Check actuator installation onto the valve.
Refer to chapter 7
Springbroken(springcloses) Check spring and replace if needed. Refer to
chapter 7
Technicalsupportalwaysavailablethroughourwebsitewww.comeval.esoryourlocaldistributor.
10. DISMANTLING THE ACTUATOR
ATTENTION!
The following points must be observed:
- Pressureless the pipe system.
- Pressureless the pneumatic supply connection of the actuator
- Remove actuator’s pneumatic supply / power supply if any electrical arrangement is present.
- Operating medium must be cool.
- Note chapter 3 for proper handling and lifting.
11. GOODS RETURN & DISPOSAL
-Foranyreturnedgoods,theissuingcompanymustprovideinformationinwrittenonanyhazardsandtheprecautionincase
of potentially polluting or harmful residues, or any mechanical damage that could present a health, safety or environmental
risk,asenforcedbyEUHealth,SafetyandEnvironmentLaw,includingtheSafetyDataSheetofthesubstancesidentiedas
potentiallyhazardous.
-Actuatorsarerecyclableandnotexpectedhazardtotheenvironment,withtheexceptionofsoftparts(PTFEandrubber
compounds)thatshouldbedisposedseparatelyonlybyapprovedprocedure,andnoincinerationispermitted.
12. WARRANTY / GUARANTEE
-Theextentandperiodofwarrantycoverarespeciedinthe“GeneralSalesTerms”ofCOMEVALVALVESYSTEMSvalidat
thetimeofdeliveryor,bywayofdeparture,inthecontractofsaleitself.
-Weguaranteefreedomoffaultsincompliancewithstate-of-the-arttechnologyandtheconrmedapplication.
- No warranty claims are accepted for any damage caused as the result of incorrect handling or disregard of this Manual, Data
Sheet and relevant regulations.
- This warranty also does not cover any damage which occurs during operation under conditions deviating from those laid
downbyspecicationsorotheragreements.
-Justiedcomplaintswillbeeliminatedbyrepaircarriedoutbyusorbyaspecialistappointedbyus.
-Noclaimswillbeacceptedbeyondthescopeofthiswarranty.Therighttoreplacementdeliveryisexcluded.
- The warranty shall not cover maintenance work.
- Our guarantee coverage does not cover for any commissioning, maintenance or installation of the product or external parts.
-Ourguaranteedoesnotcoverproductsprovedtohavebeentamperedwithorfaultedbymaterialwearandtear.
-ThePurchaser isresponsiblefor checkingthatthe incomingproductis receivedingood conditionandconforms tothe
orderedspecications.Incaseofdamagecausedduringtransititisnecessarytoimmediatelycomplaintothecarrierwithin24
hours.Afterthistimecarrierscouldnotassumethederivedcosts.Incaseofanydeviationinrelationtoorderspecications,
please contact us.

©COMEVAL VALVE SYSTEMS Technical Dept. Ref. IOM - PNEUMATIC ACTUATORS AF SERIES - Ed.20/11
Comeval Valve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly updated data on www.comeval.es
COLUMNLESS PNEUMATIC ACTUATORS AF SERIES
FOR DIAPHRAGM VALVES
Page 9
13. PARTS LIST
Single Acting spring to close
3
2
4
5
6
7
20
9
21
1
8
10
11
16
14
15
22
13
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
20
Single Acting spring to open
1
5
9
18
6
8
2
13
16
14
15
22
11
10
7
No. Description
1Handwheel
2Stem extension
3Nut
4Opening limit rod
5Springchamberbolts
6Spring plate
7Springchamber
8Spring
9Visual indicator
10 Upperchamber
11 Chambersunionbolts
12 Retainerbolt
13 Retainer washers
14 Diaphragm upper plate
15 Diaphragm
16 Lowerchamber
17 Spring’sseat
18 Stemextension’slockingnut
19 Stem’slockingnut
20 Travel limiter screws
21 Bushing
22 Housing plate
1
2
18
9
5
6
7
8
17
10
11
13
13 14
15
16

©COMEVAL VALVE SYSTEMS Technical Dept. Ref. IOM - PNEUMATIC ACTUATORS AF SERIES - Ed.20/11
Comeval Valve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly updated data on www.comeval.es
COLUMNLESS PNEUMATIC ACTUATORS AF SERIES
FOR DIAPHRAGM VALVES
Page 10
DoubleActing
16
14
15
14
19
10
11
10
11
19
14
15
16
No. Description
10 Upperchamber
11 Chambersunionbolts
14 Diaphragm upper plate
15 Diaphragm
16 Lowerchamber
19 Stem’slockingnut
14. ANNEXES
14.1 DeclarationofConformity-DC09
14.2 DataSheet-DS09
COMEVALVALVESYSTEMS,S.L.yCIA.,Soc.Comanditaria
Les Rotes, 15 46540 El Puig (Valencia) España
Phone+34961479011·Fax+34961472799
E-mail[email protected] -www.comeval.es
Updated documents on www.comeval.es