Honeywell HON COCON 13 User manual

Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 1




UNDERGROUNDGASREGULATIONSTATION

TYPE:HONCOCON13
Twinstream
Active/Slam–Active/Monitor

OPERATORS‐MANUAL





HoneywellProcessSolutions
HoneywellBryanDonkinGasTechnologiesLtd.
EnterpriseDrive,Holmewood
ChesterfieldS425UZ,England
Tel:+44(0)1246501‐501
Fax:+44(0)1246501‐500
www.honeywellprocess.comEdition:January2016

Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 2

CONTENTSPage:

1‐Introduction4

2‐General5

2.1‐Technicaldata7
2.2‐WhatisHONCocon137
2.3‐Construction7
2.4‐Principleofoperation
2.4.1‐Active/Slamoperation    8
2.4.2‐Active/Monitoroperation    10
2.4.3‐Pressurepattern11 
2.4.4–PressureControl12
2.4.5–ActiveControl12
2.4.6–MonitorControl13
2.4.7–PilotControl
2.5‐Automaticoperation15
2.6‐Maintenance15

3‐Safety17

4–Installation&operation18

4.1–Installationinstructions18

4.1.1‐Soilconditionandfoundation   19
4.1.2‐Pitdimensions19
4.1.3‐Placementofthebody    20
4.1.4‐Installationofventstack    20

4.2‐Startingup21

4.2.1‐Installationofcartridge    22
4.2.2‐Emergency‐stop22

4.3‐Operation23

4.3.1–Beforegettingstarted    23
4.3.2–Leakagetestandsetup    23

4.3.2.1–SlamShutValve    23
4.3.2.2–ReliefValve    24
4.3.2.3–Regulator(s)    24
4.3.2.4–GasControlModule   24


4.4–CommissioningoftheHONCocon    25

4.5–Troubleshooting26

4.6–Shuttingdown27

Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 3

4.7‐Replacingparts27

4.7.1‐Uppersealrings28
4.7.2‐Lowersealrings28
4.7.3‐Dustfilter29
4.7.4‐Stock29

4.8‐Storage24



5–Options30

5.1‐Introduction:Options30

5.4‐Reliefvalve30

5.5–Valvepositionindicator30

6‐Additionaldata31

6.1‐Adjustmentform31

Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 4
1.Introduction


Thismanualhasbeencompiledtohelpyouinstall,adjustandmaintainthegaspressurereducingstation.
Itanswersthemostrecurringquestionsaboutthegaspressurereducingstationanditexplainshowtoreplaceseveral
partseasily.Themanualisforoperatorswhoarequalifiedinassemblingandoperatinggasinstallations.

Thismanualhasbeendividedintosixchapters,inordertogivetheoperatorseasyaccesstotherequiredinformation.

Chapter1 Introduction
Chapter2 Generalinformationconcerningthegaspressurereducingstation.
Chapter3 DescribeshowtooperatetheCocon13safely.
Chapter4 Describesinstallation,commissioningandmaintenance
Chapter5 Describestheextraoptionsthatarepossible
Chapter6 Additionaldatacontainsvariousliststohelpyoufindtherequiredinformationinthis
manual.

Thisgaspressurereducingstationistheresultofyearsofdevelopment.Developmentisstillinprocess.Wewill
informyoubymailingaboutdevelopmentsconcerningthistypeofgaspressurereducingstation.

Definitions

p1=Inletpressure
p2=Reducedpressure
p=Differentialpressure(p1‐p2)
CR=Closingrate
MR=Monitoringrate
Q=Capacity




Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 5


ThestandardCocon13isatwinstreamgasreducingsystemwhichcanbeconfiguredinseveralways.

Example1
BothlinesActiveregulatorwithSSV

Example2
OnelineActive/MonitorregulatorandonelineActive/SSV




PictureofatwinstreamCocon13inclusivemanifoldsandfinalcoating.

Thein‐andoutletvalvesareconnectedbymanifoldscreatingatwinsteamconfiguration.

Oneofthelinesnormallyisthe“stand‐by”lineandoneisoperational.



Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 6

2.General

2.1Technicaldata

TechnicaldataHONCOCON13twinstream:
Medium    :alltypesofgasesexceptforSulphur‐containinggases(H2S).
StationsforgaspressurereductionofgasescontainingSulphur
areavailableonrequest.
Inletpressure(p1)  :maximum20bar(ANSI150)
Outletpressure(p2)  :minimum20mbar(2kPa)
MinimalΔp(p1‐p2)  :0.5bar
Temperaturerange(ambient) :‐20°Cto+60°C
Flowcoefficient   :Cgvalue(EN334)435
Regulatingcapacities  :seesizingtables

Totalweight    :about300kg
Cartridgeweight   :about40kg
Packedvolume   :about1.5m3
Length    :maximum1435mm(incl.header)
Width    :maximum860mm
Height    :maximum980mm

Inletconnection   :2”
Outletconnection  :4”
Pressurerating   :accordingtoANSI150

Impulselineconnection  :metricfittingsaccordingtoDIN2353
Pressuregauges   :2or3,formeasuringinlet,(intermediate)andoutletpressure.
Pressuregauge   :¼"BSPthread

Regulatortype   :two‐pathpilotoperatedspringloadedclosedgaspressure
regulator
Shutoffvalvetype  :directactingsafetyshutoffdevice(SSD)withintegralpressure
equalizing.(Pushbuttontype)
Filter    :cartridgefilterwithsupportcage
Filtermaterial   :felt
Filterfineness   :3micron(0,003mm)

Safetydevices
Safetydevice   :SSDvalvewithSSDcontroller

Locationoftypeplates
Casing    :beneathpitcover
Unit    :onmembranecover
Pilots    :onthesideofthepilot

Informationontypeplates
Casing    :namemanufacturer,typespecification,serialnumber,maximum
operationpressure,yearofconstruction
Unit    :namemanufacturer,typespecification,serialnumber,maximum
operationpressure,minimalreducedpressure,yearof
construction
Pilots    :namemanufacturer,typespecification,springtype,serial
number,adjustmentdata,yearofconstruction,maximum
allowedinletpressure

Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 7

2.2WhatistheHONCOCON13

TheHONCocon13isacompleteself‐containedundergroundgasregulatingstationforthereductionofgaspressure.
Thestationcanbecompletelyburiedorinstalledabovegroundinanareamuchsmallerthanaconventional
regulatingstation.
Thestationensuresreliablegassupplyataconstantpressureindependentofthegasconsumption.

Thestationhavingallessentialelementsofaconventionalpressurereductionstationisdesignedforuseongas
distributionandindustrialapplications.
Onlyaveryrestrictedareaisrequiredforinstallingthestation.
Theworkingelementsarecontainedinaremovablecartridgeretainedbyasimpleclosingconstruction.
Allbeinghousedinasteelbodythatisinstalledundergroundintothegasmain.
Abovegroundisaventstack,whichcontainsventpipesforatmosphericreferenceandthereliefvalve.

TheHONCoconissuppliedpre‐assembledintoaskidpackage,whichconsiderablyreducestheon‐siteinstallation
time.

Thestationismadeofsteel,aluminum,bronzeandsynthetics.Thestationcanbeproducedinothermaterialsupon
request.



2.3Construction

Remark:Forthelocationofthepartsofthegaspressurereducingstation,mentionedinthetext,wereferto
illustration2.4.1.

Theshortnumbersbetweenthebrackets,whicharementionedinthetext,
arepositionnumbersofthepartsinillustration2.1.

Thetopofthestationislocatedafewcentimetersaboveoratgroundlevel.Dependingonthecompositionofthe
soil,aconcretefoundation(plate)underthestationmaybeneeded.


ThegasregulatingstationHONCOCON13consistsoftwoparts:

‐ Thebody.
‐ Thegasregulatingandsafetyunit.(Cartridge)

Remark:The"gasregulatingandsafetyunit"willbereferredtoasthecartridgeintherestofthe
manual.












Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 8

2.4.1Active/Slamoperation

figure2.4.1'CrosssectionHONCocon13Active/SlamShutValve

01Cover
02Liftinghandle
03SSD‐controller
04Body
05Regulator
06SSD‐valve
07Filterelement
08Stemextension
09Inletballvalve*
10Pitcover
11Outletvalve*
*(Isolatingvalves)   

Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 9

Thehingedpitlidcover(10)isfittedwithastainlesslatchthatissecurelypluggedforthepreventionofunauthorized
entry.

Anisolatingballvalve(09)ismountedtotheinletofthecasing.Whenthisballvalveisopen,itshandleprevents
removalofthePlexiglascover.

Adustfilter(07)isconnectedunderthecartridge.

Thegasthenpassesthroughasafetyshut‐offdeviceupstreamoftheregulatorwithinthemodularcartridge:

‐ Thedeviceconsistsofassdvalve(06)andassdcontroller(03).Thecontrollersitsontopofthecartridge.If
theregulatorfailsintheopenposition,therelaywilldetectanincreaseinlinepressureandreleasethe
spring‐loadedvalve,cuttingoffthegassupply.Itisalsofittedwithamanualemergencyreleasebutton.

Gaspressurereductionisachievedbyapilotoperated,diaphragmregulator(05).
Therequiredoutletpressureissetandcontrolledwiththepilot.

Avalve(11)isattachedtotheoutletflange.Thevalvecanbeoperatedwithoutremovingthecoverofthecasing.
However,asasafetyfeature,ifthisvalveisopen,thenitisnotpossibletoremovethisPlexiglascover.

Theinstallationofareliefvalveisanoption.

Transducerscanbeinstalledintheprotectionoftheenclosedspace,fortheremotemeasurementofpressures.Close
indicationoftheslamshutvalvebymeansofaproximityswitchisalsoavailable.

Thestationisfittedwithtwopressuregaugeswhichreadtheinletandoutletpressures.Thesegaugesaresituated
undertheprotectionofthePlexiglascoverbutarevisiblewhenthepitlidcoverisopened.

Purgevalvesfordepressurizationoftheunitaremountedonthecartridge.

Ahandleisattachedtothecartridge,sothecartridgecanbeeasilyremovedfromthecasing.


Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 10
2.4.2–Active/Monitoroperation

Gasflowsfrominlettooutletpassinginletvalve,filter,monitor,worker,andoutletvalve.

Fig.2.4.2

Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 11

2.4.3 PressurePattern

Thefollowingfunctionalpressuresstagescanbe
distinguished:

Fig.2.4.3
Takenotethatinthepilotingadditionalauxiliarypressurestagescanbefound.


Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 12

2.4.4 PressureControl

Twooperationmodesarepossible:activeandmonitorcontrol.Bothmodesoperateidenticalandcanbereversed
duringtestingandoperation.Duringnormaloperationtheupstreamcontrolvalvemonitorstheoutletpressurein
wide‐openposition,whilethedownstreamvalvereducesinlettooutletpressureinthrottlingposition.

Controlhasbeenbaseduponcascadedloops(withmasterandslave)whichhavebeenprovenreliableandaccurate
undermostoperationconditions.Theoutletpressuredependsuponthedome‐load(motorization)assetand
correctedbythepilot.

2.4.5 ActiveControl
Fig.3.3.1

LowPressure

Ifthedomeload(activemotorization)ontheactivevalve(1)exceedstheoutletpressure,thediaphragm(2)willmove
upward.Thisincreasesthestemtravelandallowstheactivetocompensate(directly)forlowpressure.

HighPressure


Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 13
Iftheoutletpressureexceedsthedomeload,thediaphragm(2)willmovedownward.Thisresultsindecreaseofstem
travelandallowstheactivetocompensate(directly)forhighpressure.


2.4.6 MonitorControl

Fig.3.3.2
LowPressure

Ifthedomeload(monitormotorization)ontheactivevalve(1)exceedstheoutletpressure,thepiston(2)willmove
downward.Thisincreasesthestemtravelandallowstheactivetocompensate(directly)forlowpressure.

HighPressure

Iftheoutletpressureexceedsthedomeload,thepiston(2)willmoveupward.Thisresultsindecreaseofstemtravel
andallowstheactivetocompensate(directly)forhighpressure.

Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 14

2.4.7 PilotControl

Thesetpointcanbeadjustedwiththesetscrewontopofthepilot(CWtoincrease,CCWtodecrease)

Asdomeload(activemotorization)andspringforcevarywithstemtraveltheoutletpressurewilldeviatefromtheset
point.Uponsetpointdeviationthepilot,(whichfunctionssimilartothemainlinevalve)willopen,orclosetocorrect
thedomeloadand(indirectly)correcttheoutletpressure.

LowPressure




















HighPressure

















Fig.3.3.3

Considerationshouldbegiventothebleedordischargeofthemonitorcontroller@lock‐up,lowflowandtestingof
theactive.
Uponactivationofthemonitorpilottheexcessofmotorizationwillbedischargedtooutletwhichresultsinclosingof
themonitor.
Notethataftermonitorlock‐up(whichequalssystemlock‐up)nobleedsarepresent.Seealsotherelevantpilot
manual


Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 15

Safetydevice:ssd‐valve

Shouldtheregulatormalfunction,thenthessd‐valvewillautomaticallycutoffthegassupply.Thevalueatwhichthe
controlleractivatesshallbehigher,thanthevaluesetontheregulatorpilot.

Whenthecauseoftheriseinoutletpressurehasbeenrectified,theslamshutvalvecanthenberesetbypressinga
buttonontherelay.





Illustration2.2'FlowschemeHONCOCON13twinstreamactive/slam–Active/slam’

Objectives

Theoperationalobjectivesofthegasregulatingstationare:

‐ Nogasleakage.
‐ Accuratecontroloftheoutletpressurebymeansofthepilotcontrolledregulator.
‐ Cleanfilteringofthegasmedium.
‐ Watertightprotectionofthecontrolequipment.


Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 16

2.5‐Automaticoperation

TheHONCoconisacompletelyself‐containedgasregulatingstation,whichoperatesautomaticallyifcorrectly
installedandset.Shouldamajormalfunctionoccur,thenthecartridgeautomaticallyshutsoffthegassupply.

2.6‐Maintenance

Althoughthecartridgehasrelativelyfewmovingparts,regularmaintenanceisadvised.Thishelpstoensurethelong
andsmoothoperationofthecartridge.

Duetoitsingeniousdesignthecartridgecanbereplacedquicklyandeasilywithapreviouslyset‐upsparecartridge.
Cartridgemaintenancecanbedoneintheserviceshop.

Lubrication

Duringnormaloperations,themovingpartsofthestationneedsnoadditionallubrication.Allmovingpartsareeither
self‐lubricatingordon'tneedany.

Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 17

3.Safety

Becauseagasregulatingstationoperateswithexplosivemedia,allsafetyaspectsmustbetakenintoaccount.Regular
maintenanceofthegasregulatingstationpromotessafeoperation.



Onlytrainedandqualifiedpersonsshouldcarryoutworkontheseunits.



Thefollowingpointsshouldalsobeconsideredandthismanual

-Whenindoubtorifoperatingthegasregulatingstationforthefirsttime,readallnecessaryinstructionsin
thismanual.

-Itisassumedthattheunithasbeenproperlyshippedandstoredpriortoinstallation.

‐ Inadditionitisrequiredtomakesurethatthecontrolvalveisonlyusedinareaswheretheoperating
pressureandtemperaturesdonotexceedtheoperatingvalueswhicharebasedonthevalvesizingdata
submittedintheorder.

-Anyhazardswhichcouldbecausedbytheprocessmediumandpressurearetobepreventedbyappropriate
means.

‐ Beforestartingmaintenance,alwaysclosethevalvesintheupstreamsupplyanddownstreamdischarge
pipesfirst.Thesevalvesshouldbesituatedwithinadistanceoffivemetersofthestation'sinletandoutlet
flanges.

‐ Ensurethatyouaresufficientlytrainedtoinstallandremovethecartridge.

‐ Ensurethatyouaresufficientlytrainedtoservicethecartridge.

‐ Protect‐ifnecessary‐yourears,eyesandhands,whencarryingoutmaintenancework.Wearearprotection,
safetyglassesandworkinggloves.

‐ Ensurethatthestationandthedirectsurroundingsarealwayswellilluminatedindarkandtwilight,during
on‐sitemaintenance.

‐ Ensurethatthereissufficientventilationsurroundingthestation,whenremovingthecartridge.Gas
condensateandotheradditivesorcontaminationsmaydamageyourhealth.

‐ Usesparkfreetoolsforallmaintenanceworktopreventexplosions.

‐ Takecareofyourbackduringtheinstallationandremovalofthecartridge.Bendyourkneesandkeepyour
backstraightinaccordancewithproperliftingpractices.Donotextendyourselforattempttoliftanything
thatistooheavyforyou.

Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: HON COCON 13
Page 18
4.Installation&operation


4.1–Installationinstructions

Thischapterdescribestheinstallationofthecasingandtheattachmentoftheupstreamsupplyanddownstream
dischargepipestothebody.Illustration4.1isadrawingofafullyinstalledstation.Usethisdrawingforguidancein
thenextfourparagraphs.







Illustration4.1'Fullyinstalledstation'













Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: HON COCON 13
Page 19


4.1.1‐Soilconditionandfoundation

Dependingonthecompositionofthesoil,aconcretefoundation(plate)underthestationmaybeneeded,toprevent
thestationfromsinking.Withthefollowingsoilcompositions,afoundationisnecessary:

‐ Organicsoilcompositionssuchaspeat,humusandgardeningsoil.
‐ Veryfine‐grainedsoilcompositions(clayplates)suchasclay,bolderclay,sandyclayandcompost.

Wealsoadviseyoutouseafoundationunderthestationwithfinegrainedsoilcompositions,suchasloam,sandy
clay,siltandloess.Useconcreteasfoundationmaterial.

Afoundationisnotnecessarywithmoderateroughgrainedsoilcompositions,suchassand,gravelsand,windborn
sanddepositandsandyplates.

Thefoundationmustbeatleast50millimetersthick.Ensurethatyoudonotonlyconsidertheweightofthestation,
whilecalculatingthethicknessofthefoundation,butalsoconsiderextraweight.(Forexample,theplacingofavehicle
onthepitcover).

Thewidthandlengthofthefoundationslabmustbeaminimumof1000mmx1500millimeters.Ensurethatthetopof
foundationplateislevelled.


4.1.2‐Pitdimensions

Thepitdepthdependsonthethicknessofthefoundation.Todeterminethepitdepthofapartiallyexposedin‐ground
station(pitcoverabovegroundlevel),alwaysusethefollowingformula:
Depthofpit=906+df

Fillinthethicknessofthefoundationdfinmillimeters.Thenumber"906"isthedistancefromthebottomofthe
casingtohalfwayupthepitcoverframe.Theresult‐thedepthofthe,tobedug,pit‐isinmillimeters.

Todeterminethepitdepthofagroundsunkstation(pitcoveratgroundlevel),alwaysusethefollowingformula:

Depthpit=980+df

Fillinthethicknessofthefoundationdfinmillimeters.Thenumber"980"isthedistancefromthebottomtothetop
ofthecasing.Theresult‐thedepthofthe,tobedug,pit‐isinmillimeters.

Example:Forafoundationplate(df)thatis100millimetersthick,thepitdepth,forapartially
exposedin‐groundstationis906+100=1006millimeters.

Forafoundationplate(df)thatis100millimetersthick,thepitdepthforastationequal
togroundlevelis980+100=1080millimeters.

Digafunnelshapedhole,sothatyoucaneasilyattachthesupplyanddischargepipestothecasing.Fastenthepiping
‐tensionfree‐intheclamps,whichareattachedtothefoundations.Deliveryofacompletefoundation‐supplied
withapositioningframeforthecasingandfasteningclampsforthepiping‐ispossible.

Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: HON COCON 13
Page 20
4.1.3‐Placementofthebody

Remark:Useliftingtackle,ahoistingframeoracranetoinstallthebody.
Duringbadweatherconditions(stormandwind),placeashelterabovethestation.This
willpreventwateranddirtfromgettingintothestation.Itisimportantthatthearea
undertheshelteriswellventilated.
Supporttheopenedpitcover,bywindforceeightandup,withasupporttoprevent
closing.

‐ Closecasingcoverandpitcover
‐ Putthehoistinghooksinthecranehooks.
‐ Hoistthecasingcarefully.Ensurethatthecenterofthecasinghangsabovethecenterofthepit.
‐ Lowerthecasingcarefullyontothefoundation.

Inmostcases,thesupplyanddischargepipesareattachedtothecasingwithaconnectingflange.

‐ PutasealringANSI150betweenthesupplypipeflangeandtheinletheader.
-Attachthesupplypipeflangetotheflangeoftheinletheaderwithfourbolts,four
nutsandeightwashers.Thewashersaresituatedbetweentheboltheadsandthesupplypipeflangeand
betweentheballvalveflangeandthenuts.
‐ PutasealringANSI150betweenthedownstreamdischargepipeflangeandtheoutletheaderflange.
‐ Attachthedownstreamdischargepipeflangetothecasing'soutletheaderflangewitheightbolts‐‐,eight
nuts‐‐andsixteenwashers.Thewashersaresituatedbetweentheboltheadsandthedischargepipeflange
andbetweentheoutletflangeandthenuts.

Remark:Insulatetheflangeconnectionswithacovering,topreventthefastenersfromcorroding.

Weadviseyoutoplacearailingaroundthestation.Thispreventsthestationfromobstructione.g.vehicles.

4.2–Installationoftheventstack

Remark:Duringbadweatherconditions(stormandwind),placeashelterabovethestation.Thiswill
preventwateranddirtfromgettingintothestation.Itisimportantthattheareaunder
theshelteriswellventilated.

Supporttheopenedpitcover,bywindforceeightandup,withasupporttopreventclosing.

Whenthecasingcoverandpitcoverareclosedandthestationisinoperation,theareainwhichtheregulatorpilot,
reliefvalveandshutoffrelayarelocatediskeptatmospheric.Thisisdonebyaconnectionbetweenthecasingand
theventpipebymeansofheavy‐dutyflexiblehoses.Thereliefhasitsownseparateconnectiontoatmosphere
throughtheventpipewithaflamearrestorontopoftheventpipe.

‐ Fillthespacebetweenthestationandthewallofthehole,untiljustundertheventconnectionsonthe
casingwithsoil.
‐ Placetheventstackatadistanceofapproximately0.5metersfromthecasinginadepthinaccordancewith
illustration4.1.Theventstackrequiresaconcretefoundation.
-Twohosesaresuppliedwiththeunit(Threehosesifareliefvalveisfitted).Oneof2meters(Incaseofrelief
valvetwo)andoneof3meterstomakeitpossibletoplacetheventstackoneachsideoftheHONCocon.
-Attachthehoseswiththe¾”fittingbetweentheventilationconnectionsonthecasingandtheventstack.
Theventstackhasthreeconnectionsthemiddleoneisforthereliefvalveconnection.Theothertwohaveto
beconnectedtothecasingtokeeptheareainwhichtheregulatorpilot,reliefvalveandshutoffrelayare
locatedatmospheric.Besurethatthehosesareconnectedinsuchawaythatnowatercanenterthehoses.
-Closethepitcover.
‐ Fillthespacebetweenthestationandwalloftheholetogroundlevelwithsoil.