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M IL Cont Controls ontrol rolssLimited Limited A KSBCompany Company
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CONTROL VALVES FOR POWER PLANTS
M ILControls Controls Contr ols Limited. Contro lsLimited. Lim ited.TheMac M achining hiningShop,a partof theworld wor ldclass classma manufacturing nufacturing facility facili ty at Meladoor Meladoo r near Cochin Cochin in Kerala.
©MILCONTROLSLIMITED, LIMITED,2002.All All righ rights tsreserved reserved
ABOUT THIS HANDBOOK Contr ontrols ols Limited Forthe thepast15years,MILControls Contro lsLimited Lim itedhasbeenoneof ofthepremier premiersuppliersof highspeciality speciality Control Contr olvalvesforthe theIndian IndianPowerPlant Plantsecto tor. r.Overtheseyearsourengineers engineershavegained enormous enormo usexperienceinall aspectsof valvedesign ign,,selectio lection nandmaintenance. maintenance. TheMILPowe The owerrPla lant ntApp Applic licati tion onHa Hand ndbo book oktr trie ies stotr tra ansla late teth this isexpe peri rie encein into toare rea adi dily ly accessibl ible ereferencetool, tool,the theneedfor forwhich whichhaslo long ngbeenexpressedbymanyof our clientsand associates.thehandbook handbookthus thusencapsulat ulates esMIL’sconti continui nuing ngfocus focusonthe thepower powersecto tor. r. At asec secondlevel,TheMIL M ILPowerPlantApplication Application Handbook,als alsoservesasaminicataloguefor for M IL’swi wide de range of products products.. It off of fersspec pecif ific ic data on ValveSelection and Operational Operati onal Master your semester with Scribd Characteristics. Read Free Foron 30this Days Sign up to vote title & The New York Times Useful Not useful HANDBOOK REFERENCE REFER ENCE DOCUMEN T: ISA HA NDBOOK FOR CONTROL CONTROL VALVES.
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CONTROL VALVES FOR POWER PLANTS
M ILControls Controls Contr ols Limited. Contro lsLimited. Lim ited.TheMac M achining hiningShop,a partof theworld wor ldclass classma manufacturing nufacturing facility facili ty at Meladoor Meladoo r near Cochin Cochin in Kerala.
©MILCONTROLSLIMITED, LIMITED,2002.All All righ rights tsreserved reserved
ABOUT THIS HANDBOOK Contr ontrols ols Limited Forthe thepast15years,MILControls Contro lsLimited Lim itedhasbeenoneof ofthepremier premiersuppliersof highspeciality speciality Control Contr olvalvesforthe theIndian IndianPowerPlant Plantsecto tor. r.Overtheseyearsourengineers engineershavegained enormous enormo usexperienceinall aspectsof valvedesign ign,,selectio lection nandmaintenance. maintenance. TheMILPowe The owerrPla lant ntApp Applic licati tion onHa Hand ndbo book oktr trie ies stotr tra ansla late teth this isexpe peri rie encein into toare rea adi dily ly accessibl ible ereferencetool, tool,the theneedfor forwhich whichhaslo long ngbeenexpressedbymanyof our clientsand associates.thehandbook handbookthus thusencapsulat ulates esMIL’sconti continui nuing ngfocus focusonthe thepower powersecto tor. r. At asec secondlevel,TheMIL M ILPowerPlantApplication Application Handbook,als alsoservesasaminicataloguefor for M IL’swi wide de range of products products.. It off of fersspec pecif ific ic data on ValveSelection and Operational Operati onal Master your semester with Scribd Characteristics. Read Free Foron 30this Days Sign up to vote title & The New York Times Useful Not useful HANDBOOK REFERENCE REFER ENCE DOCUMEN T: ISA HA NDBOOK FOR CONTROL CONTROL VALVES.
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HANDBOOK
Contents
Page
1.1 Com ompa pany nyov ove erv rvie iew w ......... ................... .................... ..................... .................... ......... 8 2.0 2. 0 In Intr trod odu uctio tion n .............. ............................. .............................. .............................. ............... 9 3.1 Majorsyste tem ms .......... ..................... ..................... .................... .................... ............. ... 13 3.2 Conde ondens nsatesystem.. tem...... ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ...... 14 3.3 FeedWat Wate ersyste tem. m........... .................... .................... ..................... ................. ...... 17 3.4 MainSte Stea amsyste tem m .......... .................... .................... .................... ................. ....... 22 3.5 He Hea ate terrDr Dra ainsyste tem m .......... .................... .................... .................... ................ ...... 31 4.1 Typic pical alap applic plica ations tions..67.5MW MW .......... .................... .................... ............ .. 35 4.2 Typic pica alapplic applica ations.11 116MW .......... .................... .................... ............ .. 36 4.3 Typic pica alapplic applica ations.21 210MW .......... .................... .................... ............ .. 38 4.4 Typic pica alapplic applica ations.25 250MW .......... .................... .................... ............ .. 40 4.5 Typic pica al applic pplica ations.5 .50 00MW M W .......... ..................... ..................... ............ .. 42 5.1 Bodyma mate teria riallspe pec cs.......... .................... .................... .................... ................. ....... 47 5.2 Allowa Allowable bleworkin working gpr pre essur ure e .......... .................... .................... ............... ..... 48 5.3 Trimmate teria riallsele lec ction .... ........ ........ ........ ........ ........ ........ ........ ........ ........ ....... ... 51 6.1 Ha Hand ndling ling&In Ins sta talla llation tion .......... .................... ..................... ..................... ............ 55 7.1 Pr Pre eventiv ntive eMainte intena nanc nce e .... ........ ........ ........ ........ ........ ........ ........ ........ ........ .... 61 7.2 7. 2 Sho hop pOv Ove erh rha aul .............. ............................. .............................. ........................ ......... 62
Master your semester Scribd 8.1 M IL2with 1000Series eries........... ..................... .................... ..................... ................... ........ 67 Read Free Foron 30this Days Sign up to vote title M IL41000Series eries........... ..................... .................... ..................... ................... ........ 6 8 & The New York 8.2 Times Useful Not useful Special offer for students: Only $4.99/month.
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8.3 M IL78000Series eries........... ..................... .................... ..................... ................... ........ 69
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CONTROL VALVES FOR POWER PLANTS
w e i v r e v o y n a p m o C 1 . 1
MIL Controls Limited. The factory premisesat Meladoor near Cochin in Kerala
E
versinceitsinception in 1983,MILhasbeenunrivalledasasupplierof high performance Control Valvesto the Indian power sector.
Thecompany,which stamped itsclassinit’sveryfirst set of major project supplies to the 210MW Neyveli TPS(Unit III&IV), the 210 MW M SEB Chandrapur TPS (Stage II), the 210MW GEB Wanakbori TPS(Stage II) and the 120MW NALCO CPP (all 5 units) wayback in 1984-85, hasgone on to excel in the design andReading manufacture of custom-built special You're a Preview application Control Valvesto meet the challenging processcontrol Unlock full access with a free trial. requirementsin thermalpowerstations. In M ay 2000, MIL achieved another milestone Download With Free Trialwhen it unveiled the MATRIXSeriesextremepressure,multi stage,multi pathaxialflowControl Valves.A productof monthsof specialisedR&D,theMATRIX Seriesvalves have been designed to kill upto 420 Kg/cm2 pressurein40stages.This ingeniousanduniquedesignhasaprogressivelydecliningresistanceflow path and is designed to eliminate Cavitation and limit Velocity in any severeservicecondition.
In Decemberwith 2001, MIL had it’scrown of glory when it becamethe first Master your semester Scribd Read Free Foron 30 Days SignCE up toarking vote this title Indiancompanyto beaccreditedwiththecovetedCE m (refer page & The New York71)Times Useful to Not useful for Control Valves, mandatory for exports the European Union Cancel anytime.
Special offer for students: Onlybeyond $4.99/month. M ay2002. The first lot of MIL valveswith CEmarking isbeing
installed in highpressuresteam/FeedWaterservicein apowerplantat
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HANDBOOK
POWER PLANT APPLICATIONS
Factorsdetermining selectionofValves. Extraordinary demandsare placed on Control Valves usedintheEnergySector.Theiroperationalparameters vary widelyin termsof pressure,pressuredrops,flow ratesandtemperature. Inaddition,othercrucialfactorslikeNoise,Cavitation, Wiredrawing, LeakageClassandFlashingalsoplayan important part in the selection of Control Valvesfor You're Reading a Preview
powerstationapplications.
Unlock full access with a free trial.
Download With Free Trial 1. HIGH TEMPERATURE 2. HIGH PRESSURE 3. HIGH PRESSURE DROP 4. COMBINED HIGH TEMPERATURE, PRESSURE & PRESSURE DROP
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7 AERODYNAMIC NOISE
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M A R G A I D W O L F ) E L Y T S M U R D ( R E L I O B L A R E N E G . 1 Special offer for students: Only $4.99/month. . G
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Powerplantapplications Unlock full access with a free trial.
Download With sys Freetems Trial ,theircharacteristics 4major systems
andvalvesusedinsuchapplications.
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The 4major systemsand critical valves. 1. CONDENSATE SYSTEM CondensatePumpMinimum Recirculation Valve DeaeratorLevelControlValve
2. FEED WATER SYSTEM BoilerFeedPump PumpMinimumRecirculation Valve. BoilerFeedWaterStartupValve.
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BoilerMainFeedWaterControlValve.
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3. MAIN STEAM SYSTEM SuperheaterAttemperator SprayWith ValveFree Trial Download ReheaterAttemperator AttemperatorSpray SprayValve. TurbineBypassValves. DeaeratorPegging SteamValves. SootBlower BlowerSteamPressureReducing Valves. PRDS System valves
Master your semester with Scribd 4. HEATER DRAIN SYSTEM Highpressureheaterdrainvalves. & The New York Times Special offer for students: Only $4.99/month. Low pressureheaterdrainvalves valves..
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CONTROL VALVES FOR POWER PLANTS
m e t s y s e t a s n e d n o C 2 . 3
Fig. 2. Condensate System.
Condensatesystem
TheCondensatePumpmust The Condensate system consists haveaminimmumRecirculation of theFeedWaterCircuitstarting orFlow toavoidoverheatingof fromthe Condenser Hotwell to the theapump andprotectit from You're Reading Preview Deaerator. The Condenser is a Cavitation.TheCondensate form of heat exchanger that Unlock full access with a free trial. condenses the exhaust steam of Recirculation Valverecirculates theTurbine. water from thepumpbackto the Download With Free Trial The exhaust steamof the Turbine Condenser to ensure minimum which is verylow in pressure and Recirculationofthepump.The temperature passes on its heat to Condensate Recirculation Valve the cooling water, is condensed hasto absorb thefull pressure and collects in the hotwell. The low pressure steam which is very dropie.,frompumpdischarge high in volume creates a vacuum pressuretotheCondenser when it is condensed into water. pressure. Duetoverynear Read Free Foron 30this Days Sign up to vote title The vacuum in the Condenser saturatedconditionsexistingin Useful Not useful increases the Thermodynamic Cancel anytime. the downstream side of thevalve Special offer for students: Only $4.99/month. efficiency of the cycle. The most criticalvalveswhichhaveabearing andrelativelyhigherpressure
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ThefunctionofthisControlValve isto maintain correctlevelsinthe Deaerator. TheDeaeratorisanopencontact typeFeedWaterHeaterwhich purgesanynoncondensableand dissolvedgases.Alsothe Deaeratoractsasareservoirfor FeedWatertosmoothentheFeed Watersupplyatvarying loads. TheFeedWaterlevelinthe Deaeratoralsohelpsin maintainingtheNetPositive TYPICAL PARAMETERS SuctionHead(NPSH)of the InletPressure:40-45bar(a) BoilerFeedWaterPump. The Outlet Pressure: 0.1bar(a) DALCVhastocatertothewidely Temperature:40-50o C varyingflowdemandfrom startupconditionsto Thetypical valvesforsuch loadconditions. Readingfull a Preview applicationshaveantiYou're Cavitation Valveselectionand design should featureswhicheliminate any Unlock full access with a free trial. bebasedonthefollowingfactors: possibilityof Cavitationby thestartup thepump droppingpressureover stages. WithDuring Download Free Trial dischargepressurewillbehigh Alsomaterialselection should be owingtolowflow requirements. verydiscreteinsuchapplications Deaeratorpressureduringthe takingintoaccountof highly startupof theplantwillbelow. ErosiveCavitatingconditions. Fig. 3. MIL 78000 Series. Condensate MinimumRecirculation Valve.
Useof 17-4PH and 440C MartensiticSteelhaveyielded excellent results.
Master your semester with Scribd & The New York The Times typical valvesforsuch
Special offer for students: Only $4.99/month. applicationsare3” or4” 78000
SeriesMultiStep/MultiStage
Thesefactorsresultin thevalve working atverylow Cvsandthe associated low operations. Read Free For 30this Days Sign up tolift vote on title Useful Not useful relatively Alsothe higher pressure Cancel anytime.
dropsintheseconditonscanlead to occuranceof Cavitation.
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CONTROL VALVES FOR POWER PLANTS
m e t s y s e t a s n e d n o C 2 . 3
You're Reading a Preview Unlock full access with a free trial.
Download With Free Trial Fig.4.M IL41000.DeaeratorlevelControlValve.
Suchextremeconditionscall for valveswith exceptionallyhigh Rangeability,besidesCavitation protectionatlowerflow conditions.
Master your semester with Scribd & The New York Times Typic aldesignsforsuch
Special offer for students: Onlyapplications $4.99/month. aretheMIL41921or
theMIL41621Serieswhich
TYPICAL
PARAMETERS
InletPressure:20-42bar(a) (a) Pressure Pressuredrop:7-42bar (a) Temperature:50-100o C Read Free Foron 30this Days Sign up to vote title
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sized,drilled,antiCavitationholes inthelowerportion,andlarge
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HANDBOOK
~
Fig. 5. Boiler FeedPumpM inimumRecirculationSystem.
FeedWatersystem
Henceevenif theFeedWater requirementsareverylow(dueto The Feed Water system includes those parts of the system from low loadconditions)thepump shouldhandleaminimumflow. Deaerator to the Boiler inlet. The systemconsists of Feed Water Toensurethisminimumflow,a piping, Feed Water pumps, high certainamount of Flowhastobe You're Reading a Preview pressureheatersand theassociated recirculated backtothe accessories. Unlock full access with a free trial.astheFlow Deaerator TheFeedWaterpressureisraisedto requirementsof theBoilermay the Boiler pressure and the Download Withnot Free beTrial sufficienttosatisfythe temperature is also raised to near minimumRecirculation saturation conditions by the high requirementsofthepump. pressureheatersandEconomisers. Theparametersareobviously The critical Control Valve verydetrimental foranyvalveto applicationsinthissystemareBoiler handle.Thevalvehastodrop a Feed Pump Minimum Recirculation Valve, Boiler Feed Water Startup pressureof 220-250barto 10bar Valve & Boiler Main Feed Water (Deaerator pressure).Alsoit may Read Free For 30this Days Signthat up to vote on title benoted the outlet ControlValve. Useful Not useful ofCancel conditions theanytime. valvearenear BoilerFeedPumpMinimum Special offer for students: Only $4.99/month. saturation,and hencethevalveis RecirculationValve. eptibleto highenergy
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CONTROL VALVES FOR POWER PLANTS
3 methods of providing Feed Pump Recirculation.
m e t s y s r e t a W d e e F 3 . 3
1. The TheModulatingTypeSystem employsaModulatingValve whichthrottlestheFlow tothe minimumrequiredwhichisa functionoftheFlow requiredby theBoiler.
3.Athirdmethodemployedby olderpowerplants, recirculatesa constantflow,regardlessof the plantload. Thepressureiskilled bySeriesof multi holeplates. Of theabovemethodstheideal systemwould betheModulating System,sinceitisthemostenergy efficient . However it exerts taxingdemandsonControl Valve functioning.
Supposethe requiredminimum Recirculationof thepumpis100 Valvearesubjectedto high tons/hr,andtheBoiler pressuredropthrottling of very requirementis90tons/hr,the minimumRecirculationvalvewill low flowsto full flow conditions. opensothatitpasses10tons/hr Thehighpressuredropthrottling andtheminimumRecirculation at low lift conditions adversely conditionissatisfied(90tons/hr affectTrimdurabilityduetowire through themainlineand10 drawing effectsandTrimErosion. You're Reading a Preview tons/hrthrough thebypassline. Unlock will full access with a free trial. Totalflowthroughthepump be100tons/hr ie.,90+10). Download With Free Trial
2. The TheOn/Off Systememploys anOn-Off valvewhichpassesa constantRecirculationFlow. Supposethe requiredminimum Recirculationof thepumpis100 tons/hr,andtheBoiler requirementis90tons/hr,the MinimumRecirculationValvewill fullyopensothatitpasses100 Special offer for students: Onlytons/hr $4.99/month. sothattheminimum
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Fig.7. MIL91000.Multistagemulti path,axialflow MATRIXSeriesvalvefor Boiler feedpumpminimumRecirculationservice
Inthiscontext,themostcost effectivesolutionisobviouslythe On-Off system. Thetypicalwith valveforScribd such Master your semester applicationistheMIL78000 & The New York Series Times whichincorporatesa Special offer for students: Only $4.99/month.
uniqueMulti Step,Multi Stage
MIL’scontinuousresearchand innovationsinPowerPlant applicationvalveshasbornefruit inthesuccessfuldevelopmentof theAxial Flow, Stage, Read Free Foron 30this Days Sign up toMulti vote title Variable Resistance des ign, the Useful Not useful Cancel anytime. MATRIXSeriesValvewhichis suitableforaModulatingSystem
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TheTrimcanbecustomizedto varioushighpressuredrop applicationsbyvaryingthe numberof stages.
m e t s y s r e t a W d e e F 3 . 3
Anothervalveisusedduringfull loadconditions.Apparentlythe applicationsmayseemsimilar.
Howevertheselection Thecharacteristiccanbe philosophyanddesign are customizedbyreallocating the entirelydifferentforthetwo pressuredropratioindifferent valves.Thisisbecauseof the stages.Theexpandingflow differentpressuredropconditions passagesalsoenhancethe existingatthetimeof Startupand Rangeabilityallowingsmooth FullLoad. andpreciseFlow Control evenat low liftoperatingflow conditions. ThetypicalparametersofLow FeedWaterRegulatorValve LoadFeedWaterControlValve Anothercritical applicationin the andFullLoadFeedWaterControl FeedWaterSystemistheBoiler Valvearegivenbelow. FeedWaterRegulatingValve whichcontrolsflowtotheBoiler LOW LOAD FEED WATER VALVE for varyingloadsof thesystem. TYPICAL
PARAMETERS
Thevalvetakesthe signalfrom InletPressure: 170-200bar(a) theFeedWaterControlYou're which Reading a Preview Outlet Pressure: Pressure: 30-110 bar (a) employsathree-elementcontrol. Unlock full access with a free trial. Temperature:230o C Thesignalisgeneratedasa functionof Drumlevel,Steam Download With Free Trial flowandFeedWaterflow. FULLLOADFEEDWATERVALVE Twokindsofvalvesareusedfor FeedWaterregulation. Onevalveisemployedduring the low loadconditionsorthestartup conditionsoftheBoiler.
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TYPICAL
PARAMETERS
InletPressure: 220-250bar(a) Outlet Press ure:210-230bar(a) Pressure: Temperature:247o C
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You're Reading a Preview Unlock full access with a free trial.
Download With Free Trial
Fig.9.M IL41008.Multi stage,LowLoad, FeedWaterregulating valve.
Thetypicaldesignforlow loadandfullloadapplicationsisthe MIL41000SeriesValveswhichemployHeavyDutyCageGuided features. TheCageGuideddesignensuresgoodThrottlingStabilityandgood Rangeabilityto caterto widelyvarying flow conditions.
Master your semester with Scribd Read Free Foron 30this Days Sign up to vote title thepressuredrop during start-up condition isveryhigh,which & The New York Where Times Useful Not useful Cancel anytime.
canbedetrimental in conventional valves,41008SeriesMulti Cage Special offer for students: Only $4.99/month. designfindsitstypicalapplicationforthelow loadvalve.
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CONTROL VALVES FOR POWER PLANTS
m e t s y s m a e t s n i a M 4 . 3
Fig.10. Critical Control Valvesin M ain SteamLine
MainSteamSystem
Boilermanufacturersemploy The Main Steam Systemconsists of variousmethodslikeburnertilt Reading a Previewspraywater systems the steamcircuit fromYou're the Boiler mechanism, outlet, Superheater System,Soot Unlock full accessetc. withto a control free trial. thetemperatureof Blowingsystem,Turbines,Reheater theMainSteam.Apoor Systemto Condenser. The steam Download Free Trial controlsystemmay temperature fullyextractedoftheenergy isfinally With dumpedinto theCondenser,which result in damagesto Turbine istheheatsink. blades,Superheatertubes, Themost critical application valves Reheatertubesetc.
in this system are: Superheater SprayControl Valves, Superheater SprayBlockValves,ReheaterSpray Control Valves, Reheater Spray BlockValves,SootBlowerPressure Control Valves, PRDS System Valves, Main Steam Special offer for students: Only Control $4.99/month. Pressure Reducing Valves, PRDS
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HenceAttemperatorvalvesare of criticalrelevance The typic alproblems by Read Free Forfaced 30this Days Sign up to vote on title superheater spray Control Valves Useful Not useful Cancel anytime. arethrottlinginstabilityandwide Rangeability.
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Fig.11. MIL41100.SuperheaterAttemperatorvalve.
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CONTROL VALVES FOR POWER PLANTS
Howevertheaboveconditions seldomcomeintoplaydueto deteriorationofBoilertubesdue to Scalebuild upandthe consequentheattransferloss.
m e t s y s m a e t s n i a M 4 . 3
Alsothesituationisfurther compoundedby withdrawal of heat throughtheSootBlower.All thesefactorsresult in adrastic reductionof spraywater requirements. Hencein practicetheSpray WaterValvewillbeseldomtaken into full capacity.Thevalvewill be workingatlowerliftconditions dueto abovesaid reasons.
Fig. 13. MIL 41400. Superheater Attemperator blockvalve.
Forhighersizes(2”andabove) theActuator thrustrequirements willbeveryhighduetothe unbalanceddesignof the41100 Seriesdesign.
Anothercriticalfactorinfluencing theselectionof Control Valveis You're Reading a 41200 Preview theLeakageClass. The featuresabalanced with anovelStaticSeal Unlock full accessdesign with a free trial. Anyexcessiveleakagewill result concept.The41200designhas in thermalshocksin Secondary thesameadvantagesthatthe Download SuperheaterTubesanderosion of With Free Trial 41100Seriesbesidestheadded Turbineblades. featureof abalancedplug. MILoffersspecialdesignslikethe Anotherapplicationof Spray 41100Seriesandthe41200 System istheblockvalve. Seriesforsuchapplications. Theblockvalvesassiststhespray The41100Seriesfeaturesan Control Valveseffectingatight unbalancedCageGuideddesign. shutoff.Anotherrequirementof Read Free Foron 30this Days Sign up to vote title ablockvalveisfaster response. Thiscombinesthetwinbenefits Useful Not useful Cancel anytime.employs System of thegoodthrottling stabilityof HencetheSpray Special offer for students: Only $4.99/month. CageGuidedvalveswiththeshut apneumaticallyoperatedOn Off
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Fig. 14. MIL 78000. Reheater AttemperatorControl Valve.
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Fig. 15. MIL 41008.Reheater AttemperatorControlValve.
You're a Preview ReheaterAttemperator ValvesReading The sourceoftheSprayWater can Unlock fullto access with a either free trial.betheFeedWater Thisapplicationisalso similar pumpoutletortheinterstage theSuperheaterSprayControl tappingof thepump. Valveapplication. Download With Free Trial Incaseof theformer,thepressure However fluctuationsin dropcanbeashighas100-120 temperatureisnotvarying asin bar,andlatter,itcanbeupto SuperheaterSprayControl. 60-70bar.
TheLeakageClassisverycritical TheMILsolutiontosuch applicationsarethe78000Series sinceexcessiveleakagecanlead toErosionof low pressureTurbine or the41128Seriesforhigh Read Free Foron 30this Days Sign up to vote title pressure drops(100-120bar). In blades. Useful useful of Not thecase moderate pressure Cancel anytime. Thevalveselectiondependson Special offer for students: Only $4.99/month. drops,itisthe41121Seriesorthe thepressuredrop acrossthe 41221Seri
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m e t s y s m a e t s n i a M 4 . 3
Fig.16. Deaerator Pegging Steam System.
DeaeratorPeggingSteamValve
Normallythesteamistakenfrom TheDeaerator isadirectcontact theAuxiliarySteamHeaderupto You're Reading a Preview 15% MCRcondition. Abovethis typeheaterwhichremoves non andupto 40% MCR,thesteamis condensablegaseslikeUnlock Oxygen full access with a free trial. takenfromtheColdReheat andCarbondioxidefromthe Header (Steamtappedafterthe FeedWater. Thesegases ,if not With Download Free Trial HighPressureTurbine).Infull expelled,willattackandcorrode loadconditions,steamistaken pipingandBoilertubes.Thehot directlyfromtheTurbine steamismixedwiththeFeed extractionline. WaterenteringtheDeaerator Typical valvesinthissystemare: bringingit tosaturation temperatureandthereby liberatinganyundissolvedornon condensablegases.
Master your semester with Scribd & The New York Times issupplied to the Special offer for students: OnlySteam $4.99/month.
Deaeratorfordeaeration of Feed
1. DEAERATOR PEGGING FROM AUXILLIARY STEAM HEADER
Read Free ForM30Ethis Days toAvote T Y P I CSign A L up P R Aon T Etitle RS
Not useful Useful Cancel Inlet Pressure: baranytime. (a) Pressure:16 Outlet Pressure:3.5bar(a)
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Soot BlowerValve
Fig. 17. MIL 41003. Deaerator pegging steamControl Valve
Theeffectivenessoftheheat transferthroughBoilertubesis adverselyaffectedbythebuild up of soot.Alsotherapidbuildupof soot inthetubescanleadto the developmentof hot spotsinthe Boilertubes.TheBoilertubes should befrequently cleaned to removethesoot.Thenormal practiceisto usehighvelocity steamjetsto blowthesoot from thetubes.Thesootremovalis effectedthroughSootBlowers. SomeSootBlowersuseairalso for theremovalof soot.
Theproblemsencounteredin valveselection for such applicationsarethehighnoise levelsassociated with thisvalve. MILoffersspeciallow noiseTrims Oneof themajorchallengeshere (Lo-dB Design)forsuch istoselectanddesignaControl You're Reading a Preview applications. The41000Series ValvefortheSteamSootBlowers. Unlock full access with a free trial. CageGuided valveswith special Theproblemsuniquetothis LowNoiseTrimhavebeenfound serviceareHighpressuredrop, Download With Free Trial excellent for suchservices. High noiselevelsandThermal Additionalnoiseattenuationcan cyclingof thevalvebodyand beachievedwithdouble stage valveinternals. pressuredropdesignssuchas doubleCageordiffuseroptionsin Sootblowing valvesarenormally isolatedbyanupstreamisolation the41000Series. valve.Hence thevalveisnot Anotherproblemassociatedwith subjected to high pres sure and Read Free For 30 Days Sign up to vote on this title thisserviceishigh exit velocities temperature when not in service. Useful Not useful dueto volumetricexpansionof Cancel anytime. However when the SootBlowing Special offer for students: Only $4.99/month. thesteamwhenthepressure isbeingdone,thevalveis
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CONTROL VALVES FOR POWER PLANTS
m e t s y s m a e t s n i a M 4 . 3
You're Reading a Preview Unlock full access with a free trial.
Download With Free Trial
Master your semester with Scribd Read Free Foron 30this Days Sign up to vote title & The New YorkFig.Times Useful 18. MIL 71114. Soot blower pressure reducing Control Valve Not useful Special offer for students: Only $4.99/month.
Hencethevalveissubjectedto
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HereMILoffersit’s41114Series
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Fig. 19. TypicalAuxiliaryPRDSSystem
You're Reading a Preview
ThesteamDesuperheating is Unlock full access with a free trial. effected throughPRDSstations– Apartfromsteambeing usedfor PressureReducing powergenerationandsoot Download WithDes Free Trial uperheating System. blowing,steamisusedforother
PRDSStationValves.
auxiliaryserviceslikegland sealingof Turbines,Steam Ejectorsin Condensersand Deaerator pegging. Themainsteamhastobe Desuperheatedbyreducing its pressureandtemperatureto utilisethesteamfortheabove Special offer for students: Only $4.99/month. mentionedapplications.
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ThePRDSsystemconsistsof a Desuperheaterpressurereducing valveandatemperatureControl Valve.Thepressurereducing valvereducesthepressureof the steambeforeentryinto the Desuperheater. Read Free Foron 30this Days Sign up to vote title
Thetemperature Control Valve Not useful Useful Cancel anytime. regulatesthespraywater quantityinto theDesuperheater.
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CONTROL VALVES FOR POWER PLANTS
m e t s y s m a e t s n i a M 4 . 3
Fig. 20.M IL41914Main SteamPressureReducing Valve.
Thecritical criticalfactorsthat govern A seatring-basketdiffuseris selectionof MainSteamPRVare: providedforeffectivenoise Highpressuredrop,High attenuationat higherpressure temperature,Highnoise levelsReading You're a Preview drop ratios. andMaterialselec selection tionforhigh The ControlValveis Unlock full access withtemperature a free trial. temperature. anothercriticalvalvecoming in
MILoffersthe41912Series or the With Download TrialAsinthecaseof theFree system. 41914Seriesfor thisapplication. ReheaterSprayControlValve, ThisdesignfeaturesaCage theselection of thisvalveisalso GuidedTrimwithspecialLow governedbythesourceof the Noisemultipleholescontrolling SprayWater.Thesourceof the theflow.Optionaldoublestage SprayWatercaneitherbefrom design isalsoavailablewhichis FeedWaterPumpoutletorinter veryeffectiveinnoiseattenuation stagetappingofthepump. Read Free Foron 30this Days Sign up to vote title athigherpressuredropratios. Inthecas eof theformer, Useful useful Notthe Cancel anytime. ForClassVleakage,the41413 pressuredrop canbeashigh as Special offer for students: Only $4.99/month. Seriesistheappropriate 100-120bar, andinthelatter
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Thecriticalfactorsthat influence theselection of thevalvesare: BodyandTrimmaterial,Valve sizeandValveflow capacity Flashingproblemsencountered in theseservicescausematerial erosion. The liquiddropletsaccelerated Fig. 21. MIL21000.HeaterDrainValve
TheHeaterDrainSystem
byrelativelyhighvelocityvapour phase,impingesonthematerial surfaceofbodyand Trimcausing
Theheaterdrainsystemconsistsof heavywear. the Feed Water heaters coming in the Condensate system and Feed GenerallyChromeMolybdenum Water system. The Feed Water steelshaveexhibited excellent heaters coming in the Condensate resistanceto FlashingErosion. system are called low pressure heaterswhichheatstheCondensate Eventhough ASTM A 217GrC5 to saturationpointbefore entry into a Preview You're Reading isrecommended bysomeusers,it Deaerator. Unlock full access with a free trial.
The heaters coming in the Feed isbeing increasinglyreplacedby WatersystemaretheHighpressure ASTM A 217GrWC9material as Download With Free Trial heaters which heat the Feed Water C5hassomesignificant to near saturation point before the manufacturingproblems,in entry into Boiler. The HP heaters and LP heaters are basicallyheatexchangers– shelland tubetype. TheheatingmediaforHP heatersisthesteamextractedfrom the reheat cycle, whereas for LP heatersthesteamisextractedfrom thelow pressureTurbine.
Master your semester with Scribd & The New York Times Theheatingmedia,i.e., thesteamis Special offer for students: Only $4.99/month. introducedinto theheaters,cooled
and ultimately condensed back to
additionto poorweldability,and isthusdifficulttoweldrepair. Anotherissueistheselection of valvebodysize.It isalways recommended select higher Read Free For 30this Days Sign up to to vote on title Useful Not useful body sizes with a reduced Cancel anytime.
capacityTrim.
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CONTROL VALVES FOR POWER PLANTS
m e t s y s n i a r d r e t a e H 5 . 3
Fig. 22. LP HeatersSystem
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TypicalInstallations
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CONTROL VALVES FOR POWER PLANTS
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. . y y e 1 1 1 1 1 1 2 1 1 3 3 e t r t r o Q o Q l l a a g g n . n . C C C C a p C C a C C C o o o o C o o B p C B o o o 0 o o 7 7 8 0 2 2 L m 8 L m 8 8 2 4 4 1 2 2 e 1 1 E e 4 4 4 1 1 1 1 4 0 E T 4 H H T B 2 2 2 2 2 2 2 : 2 B : 2 2 2 r r m m m m m m m e e c m m m m c c c c c c c / c / c / c / / / . g / m r . / / / / m r g g g g g g g o g g g o P k k t P k k k k k k k k k t s 5 8 s 3 3 3 3 0 0 1 1 u u 1 1 1 7 7 7 1 1 1 C 1 C
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W M 0 1 2 . s n o i t a c i l p p a l a c i p y T 3 . 4
. . . y y y s t y t 2 8 2 8 2 8 8 4 s 1 1 1 1 1 t 2 1 h a a r Q r Q Q c i d d r a a T L . M . M . C C C C C E p C L p L p C C C C C C C C C o o o o o o o o o o o o o o o E 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 H B m m H H m : 6 6 6 6 6 6 6 4 4 4 5 5 5 5 5 e 2 2 r e 2 2 2 2 2 2 2 4 B e 5 5 2 2 2 B : T : r T 2 2 e T 2 2 2 2 2 2 2 2 r 2 2 2 2 2 e e m o m m m m m m m m m m m m m m m m m t c / c / c / c / c / c / c / c o c / c / c / c / c c / c s / / o . / t . . t g g u r g g g g g g g g s r g g g g g r k s P k k k k k k k k C k k k k k k P u P u 5 5 5 5 5 5 5 5 C 5 5 6 6 6 6 5 C 6 6 6 6 6 6 6 8 6 6 8 8 8 8 8 2 2 2 2 2 2 2 1 1 1 2 2 2 2 2 v 5 5 C 7 5 4
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. . y y 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 i t d t h l Q a e b Q a D r L e . C E . d C C C C C C C C C C C C C C C C C y p o H p C o o o o o o o o o o o o C o o o o o o o 0 0 5 5 5 0 0 0 0 0 0 0 5 H m 0 B : m 5 5 0 0 5 r e 3 5 1 1 1 8 8 3 3 0 0 7 5 5 L e 5 5 5 5 5 5 5 e E T 2 T 2 3 2 2 2 1 1 1 1 1 1 1 H m 2 2 2 2 2 2 2 2 2 2 2 2 B o 2 2 2 2 2 2 2 2 : t m m m m m m m m m m m m m m m m r s c m m m m c c c c c c c c c c c c c c c / e . u r c / c / c / c / / / / / / / / . / / / / / / / / g r C g g g g g g g g g g g g g g g m P k g g g g P k k k k k k k k k k k k k k k k k k k o 0 t 0 8 8 8 8 0 0 1 5 5 5 5 0 0 5 s 6 2 4 4 4 4 2 2 8 8 8 8 1 2 2 2 2 1 1 2 u 2 C 0 5 5 5 0 0 5 2 0 0 4 v 5 v 0 0 3 6 6 6 0 0 4 2 7 7 0 0 4 0 7 1 3 6 1 C 1 I C 0 3 4 5 5 5 9 9 1 2 5 5 0 1 9 1 V & V t y C C 6 6 6 6 6 C C C C C C C 5 C M M C 5 y 0 i C 8 8 C d 1 n d C C C C C C C C C C C C C C 0 o o W W W W W W W W W W W W W W 1 F A W F I B A U B C C W I e g a * * g 0 t 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 S g 0 n n 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 i 5 S t i t 3 6 6 6 6 3 3 3 3 3 3 3 3 3 3 3 3 3 3 P a 2 T a R a R . . d S a . . . . . . . . . . . . . n . n . . . . i P e i n w e n n n i n n i n n n n n n n n n i n n n i T i i i i i i i i i i 0 0 4 i i i i 5 z 2 a i z i r S . x 6 1 2 3 1 x y S 6 0 a 1 3 3 3 4 4 3 4 8 8 1 1 6 a 4 j p i o V 2 1 1 1 1 1 1 1 1 1 1 1 2 3 5 1 1 1 R : l 2 : l 3 1 1 2 2 2 2 2 2 2 2 2 X 2 1 0 X 1 1 2 0 t t e e 9 3 3 3 3 3 6 6 6 6 6 6 6 0 1 6 6 6 c d 9 c d 1 1 1 1 1 1 1 1 1 1 1 1 1 1 8 1 1 1 1 e o 1 e o 8 j j 4 4 7 - 4 - 4 - 4 - 4 - 4 - 4 - 4 - 4 - 4 - 4 - 4 - 7 - 2 - 4 - 4 - 4 - 4 o o 8 8 8 8 8 8 8 7 8 7 8 8 8 7 7 7 7 8 r M 7 r M 8 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 P P
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Unlock full access with a free trial. R O T A Download With Free Trial R E A E D O T G N R R K E O N O 1 - R 2 I I R 2 N D T L T A O X O X X A A A A T T O T O O E R E L B B A A S N B H E 5 R I U R H 2 H H ) ) C A E E M A S S C D H A A A A H S C R N R I A E L 1 A N C Y ( H A D E E ( L L E D P P L R E A L L L T X O O H D F D F L F G S U L L . T O O O O O O O T T R R E E E B W X H T T T T T T O E M P T V W W R U S U R N N N 1 I N I N I T T L I N I N O D - H Read Free For 30 Days S Sign up to vote on this title S A C I A L L A A A A A I M O O A A H A F E S V E I O M M R R R R R R R P T L H H R N R F C L Useful F E A Not Iuseful I D D D D D D O O D O O X anytime. R L L L L L R N T T O V S L O OCancel M E F F F A A A A A L A A T T O N E A P P E E E T T T M M M M M M M M M N N R U I I D A A M - A - U R R R R R A A S E R A A O E N S S S E E O O O O O R T N O
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W M 0 5 2 . s n o i t a c i l p p a l a c i p y T 4 . 4
. . . y y y i t y t 2 8 2 8 2 8 8 2 e 2 2 2 2 2 2 4 2 h t h r l Q Q Q o c e l i r a D T g L L . n . E . E C C C C C C C C C C C C C a p C C C H p o o H p o o o o o o o o B o o o o o o B 0 0 0 0 0 0 0 0 5 0 0 0 0 0 8 8 B m m L m : : 6 6 5 5 5 5 5 5 4 7 7 6 7 7 4 4 r e 2 2 r e 2 2 3 3 3 3 3 4 E e 5 1 1 3 1 1 e T e T H T 2 2 2 2 2 2 2 2 B 2 2 2 2 2 2 2 m m 2 : o r o m m m m m m m m m m m m m m t m e t c / c / c / c / c / c / c / c c / c / c c / c m c c / c s s / g / u r . / . / . / m r u g g g g g g g g g g g g g g r g k k C P k k C P k k k k k k k k t o P k k k k 2 2 2 2 2 2 2 2 s 9 7 7 7 7 0 0 6 8 6 8 8 8 8 8 u 6 6 6 8 6 6 3 3 2 1 2 1 2 2 1 1 C 1 2 2 4 2 2 3 3 3 5 8 0 5 5 v 0 5 v 0 0 v 0 4 . 3 . 6 0 . 3 . 2 3 1 3 1 2 0 0 C 0 C 4 C 1 2 3 7 1 2 9 2 W M 0 5 y 6 6 5 y 6 6 6 6 6 6 y 9 5 C C 5 2 2 d C C 0 C C 0 d C C C C C C 1 d C 0 2 1 * o W W 1 1 1 o W W W W W W F F o W A W W 2 W W A A B B B . M M S 0 0 P 5 5 T * L 2 * L P 0 e g 0 0 2 x * x g P 0 0 0 0 0 0 0 0 0 S 0 0 g n 0 0 2 g 2 0 0 0 0 0 0 0 0 0 n 0 n 0 S 0 0 0 i i d i 5 5 5 5 5 5 5 5 5 5 5 5 t 2 2 2 2 2 2 2 2 U t 0 0 2 6 2 5 u t 2 a 2 2 U a a 5 5 N R N R B R 2 2 e A A . g . . . . n . H . . . . . . . H d i . i . . n i n A e n n n n n n n n A e i n i n i n n u e 0 i i n D i i i i i i i i z 1 4 D i z i 5 z 4 B i 5 5 5 5 . . . . . 6 3 3 2 2 2 1 1 S S x x x S S C S 4 2 1 6 1 1 2 6 E E S S S 1 E B B 1 4 1 4 1 4 3 1 : 2 2 4 2 1 1 C 1 : : l 1 l X 2 X 2 X X 0 7 t l 1 0 2 1 0 0 2 t e 2 e 4 0 4 0 4 1 0 5 c e 4 0 0 0 0 0 9 9 t c c d 1 1 8 8 1 1 1 1 8 0 j 1 j e d 1 1 e d 1 8 e o 1 j 4 - 4 - 4 - 7 - o o 4 - 7 - 4 - 4 - 7 - 7 - 4 - 4 - 2 - 7 - 4 - o o 4 o 8 8 8 8 8 8 8 r M 8 8 8 8 8 8 r M 8 8 r M 8 3 3 3 3 3 3 3 3 3 3 3 3 3 3 P 3 3 P P
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2 2 2 2 2 2 2 2 2 2 2 2 4 2 2 2 2 2 2 i d h l a e b a D C C C C C C C C C C C C r C C C C C C o L o o o o o o o o o o o o C C e 0 o o o o o o E 0 0 5 5 5 5 5 0 0 5 5 0 o 5 d 5 5 5 0 0 y 5 H 2 6 1 1 1 7 7 3 3 0 0 7 5 5 5 5 5 5 4 4 2 3 2 2 2 1 1 1 1 1 1 1 H 2 B r L 2 : E m e 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 H c m m m m m m m m m m m m m m m m m m m m / o / c c / c / c / c / c / c c c c c / c c / c / c / c c c c B : / / / g / / / g t g / r k g g g g g g / g g g g / g g g g g g g e 0 s k k k k k k k k k k k k u k k k k k k k 8 8 8 8 0 0 1 7 7 7 0 m 6 C 4 1 4 4 4 4 2 2 8 8 8 8 1 2 2 2 3 8 8 8 o 2 t s u 5 0 0 0 6 0 0 0 0 5 5 0 0 5 5 7 C 5 5 0 , 5 1 0 5 5 5 2 2 7 7 7 7 0 0 4 9 1 1 9 4 2 3 5 1 1 1 1 5 5 1 9 1 C 6 6 6 6 6 C C C C C C 5 C C C M M W 5 0 W C C C C C C C C C C C C C C 0 8 1 C C C 8 M 1 M F W W W W W A W W W W W W W W A W W W F 0 0 C C 5 5 2 2 * * 2 2 0 , , 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 S 0 S 0 0 0 0 0 0 0 5 5 5 5 0 0 0 0 0 5 0 5 P 5 P 0 3 6 6 6 6 3 3 1 1 1 1 3 3 6 3 3 1 3 1 T 2 T m m e e d . d . . . . . . . . . . . . . . n . . . . n u . n u i n i i i n n n n n n n n n n n n i n i n i n n g 2 g i i i i i i i i i i 2 i 3 i a x a 8 0 i x 3 3 3 4 4 4 4 8 8 3 3 1 3 3 4 1 1 h 6 t 4 h t o o 3 : 2 2 1 1 1 1 1 1 1 1 1 1 1 3 2 5 2 2 2 K : 0 K 1 1 2 2 2 2 2 2 2 2 2 X 2 0 1 X 1 1 1 t t 9 5 9 9 5 9 5 6 5 6 9 5 0 6 1 6 5 6 c 1 c 9 8 1 1 1 1 1 1 1 1 1 1 1 1 8 1 1 1 1 1 e 1 e 7 j j 4 - o - 4 - 4 - 4 - 4 - 4 - 4 - 4 - 4 - 4 - 4 - 4 - 7 - 4 - 2 - 4 - 4 - 4 - 4 o 8 8 8 7 8 7 8 7 8 7 8 8 7 8 7 7 7 7 r 7 r 8 P 3 P 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
You're Reading a Preview Unlock full access with a free trial. R O T A Download With Free Trial R L E L N E A O E I W T D T A O O L K T H U N R R C E E A T N R L R O I T D T A O O K C O I A A H S K T E R T S E R K K N N N A T R A A H R . N N E E A 5 A R T 2 A 1 A L N L N D ) ) O T A E F M E H T I O U T T L N C C H A P H H A C C H A S E S H L O M P Y O L D P H H ( P E P R H R A D A L S L S O R P A C ( I T L L O E L R S C S L A A L M L T T O T M O . F P O O O L L E E X F E E A S T U U H T E P T P T F T F W N R V D P O W W P P P K U R N N L D N H N L I L O C S E H I T T M A A C I U N Read Free For 30 Days Sign up to vote on this title L S A O O A O I T A E O O A U V O T E A A M M R T T R T R O T R T F H H T E R C K M S D N D A N D I N D N N I M O O E Useful Not useful I I H X N S A O O Sanytime. I V R L R N L I Cancel A L E A M T T F F A A N E A L A O A A S I E R A A E R R T P P E D R R Special offer for students: Only $4.99/month. E M S M M M D D M D M D M D R D T N L U U F Y . . R . R . R . O N A V P Y A A R T C T E E S O S L M S E E O L T T T N T O L L O O K K T O N C N A
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CONTROL VALVES FOR POWER PLANTS
W M 0 0 5 . s n o i t a c i l p p a l a c i p y T 5 . 4
. . . y y y s t s t 2 2 6 4 2 2 l 2 y t 2 8 2 8 8 4 l h o o Q Q Q r r c i t t r n n T o o C C . C L . . E C C C C C C C p o o C C C C o H p o n p C o o o o o n o o o o 5 0 7 0 0 0 0 0 0 2 o o m 0 B m 7 0 0 m r r : 9 1 6 6 6 6 6 8 e e t e 4 4 5 4 t r l T 2 e T 2 2 2 2 2 4 l T 2 4 e e 2 2 2 2 2 2 2 K K 2 2 2 2 2 2 m : : r o m m m m m m m r m m m m m m e c t c c c c c c e . / c / c / c / c / c / c s . / / / / / / / . m u g g g g g g g r r g g g g g g m P r k k k k k k o P k C P o k k k k k k t 0 0 0 0 0 3 t 0 s s 0 7 7 7 7 0 4 4 4 4 4 1 u 6 u 2 5 4 4 4 1 3 3 3 3 3 2 C 3 C 0 5 0 0 5 0 v 5 v 5 6 5 5 2 5 v 0 2 1 4 7 8 5 5 0 2 7 1 2 C 4 P C 3 C 7 2 9 3 1 1 P 1 P P P T P T S T S S W W y C 6 5 C 6 M y 5 y C C C C C W d C C 0 C C 8 M d C C C C C 1 M d 1 o C 0 o o W W 1 M B F 0 A W W F W W W W W B C 0 B 0 0 5 0 5 x 5 x 2 * x 2 * 2 * S 0 0 0 0 0 0 0 S g g 0 0 0 0 0 0 S n 0 P g P i 0 0 0 0 0 0 n 0 0 0 0 0 0 n T P i i T 5 5 5 5 5 5 5 t t t l T a 2 a a 2 2 2 2 2 2 r a 3 6 6 3 3 3 r R e R R h e h c h a . l c . . . c . n y . . . . . . l n a . . i n n n i T n i n n i n n n a e 8 h e n i i n i e i i z x d i z T i z i 3 3 i 5 i 2 6 i 0 i . 2 4 8 4 x C S n S 8 x x 3 2 C S 2 i 1 1 1 P 4 4 4 P 1 V T T N C 2 3 1 2 1 1 1 1 2 1 4 2 N : l 1 P l X 2 X X 2 1 : l 2 1 1 0 2 1 2 t t T e e 5 5 1 5 6 6 5 e 6 0 0 4 4 4 c c d 1 N d 1 1 1 1 1 1 1 1 8 1 1 1 e o 4 e d j j o 4 o 4 4 4 4 4 4 : - 4 - 7 - 4 - 4 - 4 - - - - - o r M 7 t M 8 8 8 8 8 8 o r M 7 8 7 8 8 7 c 3 3 3 3 3 3 3 e P 3 3 3 3 3 P 3 j o r You're Reading a Preview P
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N Unlock full access with a free trial. O I T A L U K Download With Free Trial C N R I A C T E E R G W A E R O V L L O F T A S V M E R G U O T N M I I T A S P C U A N I U R N E E E D M K D R E A R . E N A O R C . S E E B T O M R V . D O V A T A L P L L O C R A A O T S A Read Free For 30 Days E M Sign up to vote on this title R V L A A L M A E P W T L V R O K E M E O L R T Useful Not useful O D E U O A I L P K C K R S M T T P Cancel anytime. O F S N D E C O C N R L N E E E T O E O E T O T T T S L B O T T L O M C A H A A A W C B Y B S S S S A W Y Y Y C Y O S N
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HANDBOOK
. . y y s t y t l 2 2 4 4 4 4 2 2 2 2 2 2 2 2 2 h 4 4 o Q Q c r i t r n T o L C . . C C E p C C C C C C C C C C C C C o o o o o o C o o n p C H o o 0 o o o o o o o 0 0 0 0 0 0 0 o B m m 0 0 0 0 0 0 0 0 6 r : 3 4 9 9 1 1 5 5 e 4 5 2 2 1 1 1 1 9 9 6 6 5 4 4 r e 2 2 t T l e T e K m 2 2 2 2 2 2 2 2 2 2 2 : 2 2 2 2 2 2 r o m m m t m m m m m m m m e m m m m m m s c c c c c c c c c c c c / c / c / c / c / c / / / u r . / / / / / / / . / / m r g g g g g g g g g g g C g g g g g g o P k k k k k k P k k k k t k k k k k k k s 0 7 7 7 4 4 7 0 0 0 0 u 1 4 5 5 3 3 4 4 3 3 3 3 4 1 1 2 2 C P P 0 5 0 0 0 0 0 v 5 5 5 0 5 5 6 5 T v 5 7 5 5 5 0 0 4 4 2 7 0 S C 5 6 3 4 5 6 5 1 C 5 1 1 4 4 6 6 5 2 P 1 P W T M S 0 W y M 6 6 6 5 6 5 6 5 6 5 6 M M 0 y C C 5 d 5 d C C C C C C C 8 8 8 M o F x o C C F 2 0 B C W W C W C W C W C W C W F C C S B W W 0 5 P x T 2 * l S g 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 a * g 0 0 P i n 5 0 0 0 0 0 0 0 0 0 0 0 0 5 0 h n 0 i c T t t 0 r a 1 6 6 6 3 6 3 3 3 3 3 3 3 1 3 a a 3 3 y e R h R h d c l n . i . n a . . . . . . . . . . . . . . . n i V e n T e n n n n n n n n n n n n n i n z i i i i i i i i i i i i i 2 5 C i z i i C i . P S 8 4 3 4 3 4 3 3 6 6 8 8 2 1 1 P S 8 4 T T N N 1 3 2 3 2 3 1 1 1 1 1 1 2 1 1 1 : l 2 0 1 0 1 0 1 1 1 1 1 1 1 2 2 : l 1 2 t e e 2 1 5 1 5 1 5 6 5 6 5 6 6 5 6 t 9 3 c d 6 c d 1 8 1 8 1 8 1 1 1 1 1 1 1 1 1 1 1 e o 4 7 4 7 4 7 4 4 4 4 4 4 4 4 4 j e j - - - - - - - - - - - - - - - o o 4 - 4 o r M 8 7 8 7 8 8 8 7 8 7 7 7 7 7 7 r M 8 8 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 P P
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APPLICATION
HANDBOOK
M ATERIAL SELECTION
Correctmaterialselectionisextremelyimportanttoensure properfunctioningandlongevityofControlValvesinPower Plantapplications.Theserviceconditionsvarywidelyin pressureandtemperatures,designpressurecangoupashigh as360kg/cm2 andtemperaturesupto566oC.TheBodyand Trimmaterialselectionshouldalsotakeintoaccountthe detrimentaleffectsof Cavitation/Flashing/HighVelocity whichareinherenttosuchsevereapplications. CONTROL VALVE. PRESSURE CONTAINING MATERIAL General Classification
Castings Castings
Carbon Steel
ASTM A 216 Gr. WCB / WCC
AlloySteel, 1¼Cr - ½Mo AlloySteel, 2¼Cr - 1Mo AlloySteel, 5Cr - ½ Mo StainlessSteel, Ty. 316
Forgings
Max.Operating OperatingTemp.
ASTM A 105 You're Reading a Preview
427ºC
ASTM A 217Gr. WC6
ASTM A 182 Gr. F11
566ºC
ASTM A 217Gr. WC9
ASTM A 182Gr. F22
566ºC
Download ASTM A 217With Gr. C5 Free Trial ASTM A 182Gr. F5a
566ºC
Unlock full access with a free trial.
ASTM A 351Gr. CF8M
ASTM A 182Gr. F316
566ºC
PRESSURE RATING. CEILING VALUES * Temp.
<93ºC
150#ANSI
300#ANSI
18.3
52.7
600#ANSI
900#ANSI 1500#ANSI
2500#ANSI
105.5
158.2
263.7
439.4
149 16.2 51.3 102.3 Master your semester with Scribd 204 14.1 49.6 99.1 & The New York Times 260 12.0 46.8 93.5 ºC
153.6
255.9
426.8
ºC
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9.8
42.5
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127.6
212.7
354.4
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CONTROL VALVES FOR POWER PLANTS
AllowableworkingpressureforASTMA 216Gr.WCC
e r u s s e r p g n i k r o w e l b a w o l l A 2 . 5
A l l o w a b l e w o r k i n g p r e s s u r e ( K g / c m 2 )
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HANDBOOK
Allowableworking pres pressure sureforASTM A 217Gr.WC6
A l l o w a b l e w o r k i n g p r e s s u r e ( K g / c m 2 )
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CONTROL VALVES FOR POWER PLANTS
Allowableworking pressureforASTM A 217Gr.WC9
e r u s s e r p g n i k r o w e l b a w o l l A 2 . 5
A l l o w a b l e w o r k i n g p r e s s u r e ( K g / c m 2 )
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HANDBOOK
h g i h r o f t n e l l e c x e , l l e e g n n n i e o c n i c o c e v n I n r I d r e o o a S . t . t . h r e r e e e e e a a v e c c c c c l l i i i i i i i s s i v v v v v a r r r r r o m m c i i r e e e e e r . . s r S S s S e S S e e e o e e e t e e e c c c i c C i i v i v n i v n i v i v f A v & s s t a s t a s s v r r o o o e e s o s o e r r r r r s V i i v S r r r r r i s e s o o s H e e e o o r o o v 0 u i C C r C C r C r t n s 0 E & & n & & & a o o 0 r o i e i y e e r e l s e 1 e t i v i v s v v v E - p o i i i h s s o y r r s s s 0 r r g o o m r i e r o r o o r o o r r 0 l 7 e S E E C E C E E ( t V
. p o r D . s e s s i r e e r S P . 0 0 d 3 o f o M , t e n v t a i s i s o s r r e o r n C , i o e v s i s o r r o r o c E - t n s o o N M
e c i v r e S e v i s o r r o C n o N & e v i s o r r o C
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) ) 5 0 7 0 0 9 1 ) H H ( ( . g . n n n n n i C C C C C i i i i d R R R R m m m i r m R H H H H C i C C t C H N 7 7 0 2 R R R r R 8 H H t H 3 e - 4 - 4 - 5 - 6 - H 2 8 f 5 1 8 8 5 6 0 3 2 a 3 3 3 3 4 5 4
e c i v r e S e v i s o r r o C n o N & e v i s o r E
Maintance Planning
. n i m C R H 8 5
You're Reading a Preview Unlock full access with a free trial. C º 3 9 5
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1 M C 0 U N 6 0 3 C 6 1 4 6 7 4 A . 4 . . r B C y y . C r G T T 4 7 G 2 6 6 4 3 8 7 5 7 4 5 2 A A 7 A A A M M M M ) T T T T M S d Free SRead S S T Foron 30this Days Sign up to vote title e A A S A t : : A a A : : k k k e c s c c Not useful r Useful g : o g oanytime. o T t n Cancel n t t t i i S S S t t a r r r A A A A a s s e a a a a H B B N N N N B C C (
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HANDBOOK
You're Reading a Preview Unlock full access with a free trial.
Fig.24. ClearancerequirementsforGlobeControl Valves
Download With Free Trial
1.Donot liftlargesizevalves bytheActuator.LiftingLugs providedontheActuatorsare forliftingtheActuatoralone. 2. TheActuatorDiaphragm Master your semester with case,EyeBolts etc.Scribd arenot ignedto lifttheheavy & The New York des Times valvebodyassembly. Special offer for students: Only $4.99/month. 3 DonotturntheActuator,
6. Whilechoosingthe location to mount thevalve, provideadequatespacefor futureoccasionswhenit may becomenecessarytoremove theBodyandActuator Read Free Foron 30this Days Sign up to vote title forrepairs.
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7. Ensurethat recommended mountingorientationsare
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CONTROL VALVES FOR POWER PLANTS
n o i t a l l a t s n I & g n i l d n a H 1 . 6
Fig. 25. Al Alternate ternate orientation orientat ions sfo forr Control Valves V alves(position-1 ispreferred)
10.Pos 13.Spec Posit itio ioner ner Gaugesand pecial ial att attenti ention onmust mustbe Trravel In T Ind dic ica ato torrsmustalw lwa ays givennot toplac place ean anelbow remaincl clearlyvi visib iblle. orpip pipeT eTless lessth than an5pipe diametersdownstream downstreamof a 11.Ca Caref reful ul choice choiceof valveto av avoi oid dinterf interferenc erence e loca lo cati tion onhelps helpsprevent with wi ththe theValve’s Valve’sFlow Cav avitati itation. on.Whenflow flowis Capacity. Ca pacity.In hi high ghpres press suregas gas upward, upwar d,and andif thefluid reducing g partial part ialllyva vapo pori rizes zesbeca becaus use eof or steampressurereducin Master your semester with Scribd applic appli catio ations ,try to have e onl only Read Free Forhav 30this Days Signns, up to vote on titley lower lo werhydrostatichead, head, s traight traig ht pipes pip es downs dow nstream tream of & The New Yorklo Times Useful Not useful loc catingthe theValve Valvetow towards ards Cancel anytime. the valve, or al alternat ternatively ivelyuse use Special offer for students: Onlythe $4.99/month. lowestpartof thepiping lowes alongsweeping sweepingelbow to canprevent preventtwo two phas phase eflow flow
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Fig. 26. 26.Typical Typical satisfactoryarrangement arrangementof o f ups upstream treamanddowns dow nstream treampiping
Fig. 27.Less atisfacto sfactory actorry yarrangement arrang arrangement ementof Lesssati atis sf actory o f upstreamanddownstream do wnstreampiping
15.SinceCont Control rol Valve Valves swi willll requiremaintenance maintenancefrom fromtime time Master your semester with Scribd to ti time me,,Bloc Blo ckValves Valves atUps Upstream treamandRead Dow Downs nstream tream Free Foron 30are Days Sign up to vote this title ess sent entiial. Bleedand anddrai drain nvalvesmay benecess neces f for or s afety. af ety. & The New York es Times Useful sary Not useful Special offer for students: Only $4.99/month.
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16.Onoc occas ass sio ions nswhenthe theCont Contro rollValve Valveisout of service ervice,,if
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MaintenanceGuidelines Unlock full access with a free trial.
Download With Trialpeakperformanceof How toFree ensure ensure
ControlValvesin powerplantapplications
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HANDBOOK
1. PREVENTIVE MAINTENANCE BEFORE
1.Itshouldbeappreciated thatduringplantstartups, abnormaloperating conditionscanadversely affecttheperformanceof the Control Valveandsometimes severelydamagethevalve.It isveryimportant that these abnormalconditionsbe recognizedandtheControl Valveisselectedtaking into accounttheseconditions.
START-UP
3.Ensurethatthe recommendedmounting orientationisfollowed.If a valveismountedwithit’s stemtravellinginthe horizontalplane,it mustbe properlysupported. 4.Ensurethatthemandatory ‘flowthrough’direction indicatedontheControl Valve(byanarrow mark)is alwaysfollowed.
2.Ensurethatmisalignment 5.Piping shouldbeflushed beforeinstallingthevalve.If alongthepipelineisnot additionalflushingisdone correctedusingthevalve. installation,itmaybe You're Readingafter a Preview Pipelinestresson the valve necessaryto removethe maycausemisalignment of Unlock full access with a free trial. internals,Especiallyif antithestemorplug/seatjoint.It Cavitation orlow noiseTrimis Download Free Trial canalsocauseflange leakor Within place. packingleak. Continuedinnextpage AFTER START-UP
1.Periodicfieldinspections shouldbemade. 2.Remember thatScribd highMaster your semester with frictionpackingneedstobe & The New York compressed Times afterinsertion.
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inservice,andthepacking
4.Coverthevalvesuitably whenprocessdrippingor corrosiveatmospheric conditions prevail. Special care Read Free Foron 30this Days Sign up to vote title tobegiventothevalve Useful Not useful Cancel anytime. accessories. 5 Air setsusuallyhavefilters
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CONTROL VALVES FOR POWER PLANTS
2. SHOP OVERHAUL
l u a h r e v o p o h S 2 . 7
1.Valvesandvalveinternal in hazardousserviceshouldbe cleanedthoroughlybefore undertakinganyrepair. Depending oncontaminant, waterwash,steaming or specialheattreatmentmay beresortedto. 2.Ensurethattheperson whoisdisassemblingthe ControlValveisthorough withthereleventprocedure. 3.Beforedisassembly,mark theActuatororientationwith respecttothebodyflanges.
4.Removethebonnetfrom thebody,andthenthegland packingcomponents. Further removetheTrimand thebottomflange. 5.DisassembletheActuator andexaminecomponentsfor damage.Afterwardsclean thepartscarefully 6.Inspectthedisassembled componentsthoroughlyand determinetheextentof reconditioningandrepair thatisrequired.
You're Reading a Preview
Continuedinfacingpage
CONTINUED FROM PREVIOU S PAGE Maintenance.Beforestartup Unlock full access with a free trial.
6.If linetrashlikeweldchips, 8.Airlinesto beconnectedto Free Trial rustetc.areexpectedDownload inthe With theControl Valvesshouldbe pipeline,temporarystrainers blown cleanof oil anddebris shouldbeinstalledupstream. beforetheyareattached. If theprocessstream 9.AvoidusingTeflon® tapes normallycontainsScale,dirt orotherforeignmaterial,itis ininstrumentair lines.While recommended thatScribd Teflon® tapeisanexcellent Master your semester with Read Free Foron 30 Days permanentstrainersorfilters threadlubricant Sign up to vote this title and seal for & The New YorkbeTimes Useful Notituseful installed.Strainersshould screwed connections, Cancel anytime. Special offer for students: Onlybe $4.99/month. installedfarenoughto neverthelesscanbreakoff in allownon-swirl flowatthe
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ShopOverhaul
7.If thebodyisrusted, descalethebody.While handlingthebody,theflange surfacesmustbeprotectedto preventanygasketleakage.
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HANDBOOK
CONTINUED FROM PREVIOUS PAGE
12.Avoid use of non standard Trims.Thesecannot matchthemetallurgyand workmanshipof factory finishedspares.
8.Assesstheneed for remachining of Bodyand Trims.Firsttheplugandseat shouldbeperfectlymatched, byprecisemachining,thenby handgrindingorlapping. Makesurethatevenfine tracesof lappingcompound iscleanedoff.
13.Reassemblethevalve bodyusingthereconditioned /newparts.Ensurethatgland packing andgasketsare changedeverytimethevalve isopenedand reassembled. Use onlyOEM* gland packingandgaskets.Low qualitygasketscancause 9. Thelappedcontact should irreversibledamagetothe notbetoowide.If thecontact valvebyseatareaErosion, bonnetErosionetc. You're Readingbody a Preview bandistoowide,amachine cuttorenewtheangles 14. While Unlock of full the access with a free trial. tightening the mating piecesisnecessary. bonnetandbottomflanges, Theanglesofthemating Download WithitFree Trial isimportant totightenthe piecesareslightlydifferentto diagonallyoppositeboltsto allowanarrowseatingband. ensureevengasketloading. 10.Forproblemslikemarred stemsurface,replacement withafactoryfinishedstemis theonlypracticalsolution. Master your semester with Scribd ThefinishoftheControl & The New York Valve Times stemissofinethat Special offer for students: Only $4.99/month. highlypolishedsurfacesare requiredto givethebest
Overtighteningcancause excessiveelongationof the gasketstherebyresultingin poorjoints. Read Free Foron 30this Days Sign up to vote title
15.Assemblepartsof the Not useful Useful install Cancel anytime. Actuator barrel, the diaphragmcaseusingnew
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CONTROL VALVES FOR POWER PLANTS
ShopOverhaul
18. Tighten(fingertight)the coupling.Applyairor remove airtoensureproperseatingof thevalve.Thentightenthe coupling andadjustthetravel indicator.
l u a h r e v o p o h S 2 . 7
CONTINUED FROM PREVIOU S PAGE
21.Carryout hydrotest, seat leakagetestandcalibration asperrelevant standards.
22.When repair to an existingvalveis uneconomical,replaceitwith anewvalvefromahigh19.Mounttheaccessories backontotheControl Valve. qualityOEM toavailof better sizing,bettermaterials, Several of themostcommon betterdesign,andmostlikely, accessories(AirSets, betterservicetoo. Process Positioners,Transducersetc.) conditionsshouldbe haveRubberDiaphragms stabilizedanddetermined thatwillhardenandcrack. accuratelyincasetheywere SomehaveORingsthat not correctlyanticipated deteriorate.Itwouldbe whentheoriginalvalve You're a Preview economicaltoreplace the Reading was specified. wholeaccessorywith spares Unlock full access with a free trial. 23.Do not buy valvesor (andrepairfaultymodels replacementpartsfrom Download duringslacktime)rather than With Free Trial non OEMs. Overemphasis repairingthemOnSite. on short-termcostsavings 20. Tubingconnectionsfor cansometimesleadto signal andoperatingair hazardousworking should becheckedwith environmentsforpersonnel, processdowntimeand soapywateror otherleak semester with Scribd increased operating costs. detecting fluids. Read Free Foron 30 Days Sign up to vote this title
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TheMILRange
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MIL 21000 Rugged,heav ytopGuided,single heavy seatedControlValves
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HANDBOOK
Forsevereservice,special double stagevalveswithsimultaneous throttlingintheplugandCage alsoisavailable. TightShut-Off:ClassIVleakage isstandard.Optional constructionsmeetClassV& Class IV leakage. QuickChangeTrim. Optional clampedseatringfacilitateseasy Trimremoval. Angle Body (70000Series). Optionalanglebodydesignwith Venturi seatisideallysuitedfor specialapplicationslikeFlashing liquidsandotherchokedflow conditions.
You're Reading a Preview Unlock full access with a free trial.
Download With Free Trial AvailableSizes&Rating ½” to2” 2”:ANSI150#to ANSI2500# 3”to 10”: 0” ANSI150#to ANSI600# SeatleakageclassasperANSI/FCI70.2 Standard:ClassIV. Optional:ClassV&ClassVI
Master your semester with Scribd FEATURES & The New York Heavy Times TopGuiding.TheValve
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CONTROL VALVES FOR POWER PLANTS
MIL 41000 HeavyDutyCageGuided ControlValves.
s e i r e S 0 0 0 1 4 L I M 2 . 8
Standardisedhighperformance material.Thisensurestrouble freeoperationevenin applicationswithinherenthigh pressuredropsandextreme temperatures. Tightshut off valves.Forlower sizes,unbalanceddesignresults in ClassVleakage. Forhighersizes,theexceptional singleseatedleaktightnessof ClassVisachievedbythe following specialoptions: 1.Auxiliaryshut-off pilot plug closesthebalancingholeslocated inthemainpluginshut-off conditions.
2.Self energisedsealrings pressing againstwallsoftheCage You're Reading a Preview &Plug arrestsleakagepastthe Unlock full access with a free trial. AvailableSizes&Rating sealring. ¾” to 14”:ANSI150#to ANSI2500#
Lo-dB/Anti-Cavitation Cages:
SeatLeakageClassasperANSI/FCI70.2
control achievedbyreplacing conventional CageswithLo-dB Cages.
Download With Free Trial 16”to20”: 20” ANSI150#to ANSI 600# NoiseattenuationandCavitation Standard:ClassIII&ClassIV Optional:ClassV FEATURES
Master your semester with Scribd & The New York Times Highallowablepressuredrops. CageGuided valvesprovide exceptionalperformanceovera rangeof pressuredropsin Special offer for students: Onlywide $4.99/month. severeservices.Theyalsohandle
SPECIAL
OPTIONS
StaticSealRing, DoubleCagedes design, ign, Twostagedesignwithdiffuserseat ring,M ulti-Stage Valves Read Free Foron 30this Days Sign up to vote title valves MIL 41008. UsefulMulti-Stage . These Not useful Cancel anytime. incorporateauniqueTrimdesignto absorb highpressuredropsthat preventCavitationandmaintain
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MIL 78000 Anti Cavitation&LowNoise Multi-stepHighPressureDrop ControlValves
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HANDBOOK
HighNoiseLevelscommonly associatedwithconventionally designedControl Valves. Highallowablepressuredrops. Noindividualstageisexposedto thefullpressuredrop,thus extending Trimlifesubstantially. AdiabaticFlow with Friction Friction. Reducespressuremuchinthe samewayaspressureloss occurringinalongpipeline. Low pressurerecovery.This minimisesCavitationpotential andcontributestowards reductionof Noiseforallfluids. Pressurerecoveryfactorsashigh as0.998.
You're ReadingStandardised a Preview highperformance
material: integrity,78000Seriesvalvesare Download Withmac Freehined Trialfromsolidsteel forging.HighperformanceTrim AvailableSizes&Rating materialensuresdurabilityinany ½” to 6” 6”:ANSI900#to ANSI2500# severeapplication. SeatleakageClassasperANSIIFCI70.2 Toensurematerial material: Unlock full access with a free trial.
Standard:ClassV Optional:ClassVI
Master your semester with Scribd FEATURES StepAxial Flow High & The New York Multi Times ResistanceTrim.Pressure Special offer for students: Only $4.99/month.
reductionoccursalongthelength
BalancedTrims:Availablefor sizes2" andabove,allow much highershut-offpressureswith Read Free Foron 30this Days Sign up to vote title conventional Actuators. Useful Not useful Cancel anytime. SPECIAL
OPTIONS.
Softseatconstruction with
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CONTROL VALVES FOR POWER PLANTS
MIL 91000
MATRIX Seriesvalves
ExtremePressureMulti-stage,Multi-path,AxialFlowAnti-Cavitation HighPressureDropControlValves
s e i r e S 0 0 0 1 9 L I M 4 . 8
FEATURES.
FlowtoOpenflowdirection. direction. EliminatesDynamicInstability inherent to Flow to Closevalves.
Varyingandexpandingflow passage.ThisenablesnearZero PressureRecoverythusensuring TortuousflowpathwithHigh thatstagewisePressureDropsare Impedanceforenergy limitedbelowtheCriticalPressure absorptionlimitsTrimVelocity Velocity. Drop.Likelihood of Cavitation is You're Reading a Preview Modified equal% ruledoutevenin extreme Unlock full accesscharacteristics with a free trial. with100:1 conditions. Rangeability. Characteristicscan IngeniousFlowPath. Reduces be customised Download With Free Trial to suit specific downstreamVelocity.Exit processapplications. VelocityandKineticEnergykept Self energisedbodyandseat underlimits.Erosion eliminated. gaskets gaskets.EnsuresZero Leak,and Pressurerecoveryfactor(Cf)as optimisesbonnet/bolting design. high as0.9999. Ingeniousdesign.Resultsin a Asmanyas50PressureDropping simplermanufacturingprocess. Read Free Foron 30this Days Sign up to vote title stages. Consequentlythismakes Useful Not useful anytime. MATRIXSeriesCancel Valves better Ruggedness of design. Ensures Special offer for students: Only $4.99/month. pricedthanothervalvesinthis longevityevenintheseverestof
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CONTROL VALVES FOR POWER PLANTS
P
INDEX A
s n o i t a r t s u l l I f o t s i L & x e d n I 1 . 9
Allowableworking pressure48
B Block Valve 24 Body Material Specs47 Boiler Feed Pump Min. Recirculation Valve13,17,18 Boiler Feed Pump M inimum Recirculation System17 BoilerFeedWater StartupValve13,17 Boiler Main Feed Water Control Valve13,17
C CE Marking 8, 71 Company overview 8 Condensate Recirculation Valve13,14 Condensate system 13, 14 Condenser 14
D Deaerator 14, 15, 17 Deaerator Level Control Valve 13,14,15,16 Deaerator Pegging Steam System26 DeaeratorPegging SteamValve13,22,26,27
E Economisers17
F Feed Pump Recirculation 18 Feed Water Control 20 Feed Water Heaters 31 Feed Water Pumps 17 Feed Water Regulating System20 Feed Water Regulator Valve20 Feed Water System 13, 17 Foster Wheeler 8 FullLoadFeedWater valve20
G GeneralBoilerFlow Diagram10
ReheaterAttemperator ControlValve25 Reheater Attemperator Spray Valve13 ReheaterSprayBlockValves22 Reheater Spray Control Valves22 Reheater System 22 Remachining 63 RWTUV 71
S Shop Overhaul 62 SlidingCollarSeatRing 19 SootBlower 24, 27 Soot Blower Pressure Control Valves22 Soot Blower Steam Pressure Reducing Valves.13 SootBlowerValve 27 Soot Blow ing System 22 Soot Blowing Valves27 SteamEjectors 29 Steam Soot Blowers27 Strainers 62 SuperHeater Attemperator Valve22,23 Superheater Attemperator Block Valve22,24 Superheater Attemperator Spray Valve13 Superheater Spray Control Valves22 Superheater System22 Teflon®tapes62 TemperatureControl Valve(Spraywater)29 Trimmaterialselection51 TurbineBypassValves. 13 Typical Applications116MW 37 Typical Applications210MW 39 Typical Applications. 250MW 41 Typical Applications. 500MW 43 Typical Applications. 67.5MW 35
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L Low Load Feed Water valve 20 Low pressure heater drain valves.13 LP heaters 31 LP Heaters System 32
M Main SteamLine 22 Main Steam Pressure Reducing Valve22,29,30 Main Steam System 13, 22 Maintenance Guidelines 59 Martensitic Steel 15 Material SelectionGuidelines45,47 MATRIX Series8,19,70 MIL 21000 31, 67 MIL 41000 16, 21, 27, 31, 68 MIL 41003 27 MIL 41008 15, 21, 25 MIL 41100 23, 24 41114 28 OnlyMIL $4.99/month. MIL 41121 30 MIL 41128 25
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H Handling and Installation53 Heater Drain System 13, 31 HeaterDrainValve31 High pressure heater drain valves.13 HPHeaters 31 HP Heaters System 32, 55
Positioner Gauges56 PRDSSpray Contro l Valves 22 PRDSStatio n Valves 29 PRDS System Cont rol Valves22 PRDSSystem Valves 13 PressureReducingDesuperheating System29 Preventive Maint enance61
ILLUSTRATIONS Fig.1. GeneralBoiler(Drumstyle)FlowDiagram10 Fig.2. CondensateSystem14 Fig.3. MIL78000 15 Fig.4. MIL41000 16 Fig.5. BoilerFeedPumpMin.RecirculationSystem17 Fig.6. MIL78000.FeedpumpMin.RecirculationValve18 Fig.7. MIL91000 19 Fig.8. FeedWaterRegulatingSystem.20 Fig. 9. MIL 41008.Multi stage, Low Load Valve21 Fig.10.CriticalControlValvesinMainSteamLine22 Fig.11. MIL41100.SuperheaterAttemperatorvalve23 Fig.12. MIL41200.SuperheaterAttemperatorvalve23 Sign up to Attemperator vote on this title Fig.13.MIL4140 0.Superheater block24 Fig.14.MIL78000.ReheaterAttemperatorControl25 UsefulAttemperator Not useful Fig.15.MIL41008.Reheater Cancel anytime.Control25 Fig. 16.Deaerator PeggingSteamSystem26 Fig.17.M IL4100327 Fig.18. MIL71114 28 Fig.19. TypicalAuxiliaryPRDSS tem29
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