Watson McDaniel WT5000 Series Operating and safety instructions

428JonesBoulevard
LimerickAirport Business Center
Pottstown,PA19464
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
INSTRUCTIONPART NO.2437200 REVISION0
Phone:(610)
495
-
5131
Fax:[phone]
www.watsonmcdaniel.com
Each WatsonMcDanielCompanyProductiswarrantedagainstdefectsinmaterialandworkmanshipforoneyearfromdate ofshipment.Thiswarrantyextendstothefirstretail purchaseronly.All defectivematerialmustbe
returnedtothepersonfromwhomyoupurchasedtheProduct,transportationprepaid,free ofanyliensorencumbrances, andiffoundtobedefectivewillberepairedfree ofchargeorreplaced,at thewarrantor's orseller's
option.Ifthematerialisreplaced,anyreplacementwill beinvoiced intheusualmanner and after inspectionofalleged defectivematerialanadjustmentwillbemadefor depreciationcaused bypurchaser's use.Innoeventwill
WatsonMcDanielCompanybeliabletodomorethanrefund theoriginalcontractprice.Incidentaland consequentialdamagesar
eexcluded,whether under thiswarrantyor otherwise.All implied warranties, including warranties
DESIGN
PARAMETERS
LIMITING
OPERATING
CONDIT
IONS
PMA900 PSIGupto 800°FPMO–650 psig
TMA800°F@900 PSIGTMO–662°F
Discharge TemperatureRange –120°F-390°F
Q
UICK
S
TART
G
UIDEAND
P
RODUCT
N
OTES
APPLICATION -THIS BIMETALLIC STEAM TRAPOFFERS DISCHARGETEMPERATUREADJUSTABILITYBETWEEN 120°F
AND 390°F ANDIS GENERALLYUSEDON STEAMTRACING ANDSMALL PROCESS APPLICATIONS FOR MAXIMUMENERGY
USAGE.
OPERATING CHARACTERISTICS –ALTHOUGHITIS POSSIBLEFOR THE OPERATIONALCYCLEOF THIS TRAPTOBE
CYCLIC,DEPENDING ON THE STABILITYOF THE APPLICATION ITWILL TYPICALLYREACHA POINTOF EQUILIBRIUMAND
HAVEA STEADYDISCHARGEOF CONDENSATE.
ORIENTATION –TRAPCAN BEINSTALLEDHORIZONTALLYOR VERTICALLYWITHTHE FLOW ARROW POINTINGIN THE
DIRECTION OF THE FLUIDFLOW.HORIZONTALINSTALLATIONS SHOULD HAVETHE ADJUSTING SCREW POINTING
UPWARD.VERTICALINSTALLATION SHOULD BEWITHFLUIDFLOWDOWNWARDONLY.
REPAIRABILITY –THIS TRAPIS IN-LINE REPAIRABLEWITHA REPLACEMENT TRAP CAPSULE.
CONSIDERATIONS –UNLESS A SPECIFICDISCHARGETEMPERATUREIS REQUESTEDFROMTHE FACTORYATTHE TIME
OF ORDER,THE STANDARDSETTING FOR THIS TRAPIS 175 °FAT 120psig. TRAPCANBEMANUALLYFIELD-
ADJUSTEDTOOTHERDISCHARGETEMPERATURESETTINGS.CONSULT THE APPROPRIATESECTIONIN THIS MANUAL
FOR ALTERNATEDISCHARGETEMPERATURESETTINGINSTRUCTIONS WHILEINTHE FIELD.
PAGE1

DISCHARGESETTEMPERATUREADJUSTMENTCHARTS
1)BOTHchartsareto bereferencedto determineadjustingscrewsetposition.
2)Based onthe capacityrequirement, entertheFLOWchartattheapplicationpressuredrop andnotethenumberofturns
required.
3)Now,entertheTEMPERATUREchartatthedesireddischargetemperatureandnotethenumberofturns.
4)Add thevaluesnoted in#2and#3 abovetodetermine the totalnumberofturnsoftheadjusting screwfromthe"0"
position.
5)Followthe setting instructionsasoutlinedabove.
COMPONENTTORQUEVALUES(ft
-
lb)
Cover180-190
CapNut25 –30
ValveSeat20 -24
REPLACEMENTPARTS
Description PartNumber
RepairableTrapCapsuleConsultFactory
S
ETTING
D
ISCHARGE
T
EMPERATURE
1. Trap canbeadjusted priortoinstallation.However,iftrap istobe adjusted onceinstalled,followthe
guidelines onthefollowingpage forproperinstallation.Beforemakinganyadjustments,make certaintrap is
isolated frombothsupplyandreturnlinepressuresandthattrap has cooledtoroomtemperatureprior toany
servicingbeingperformed.
2. Togainaccess totheadjustingscrew,use awrenchto securethecoveranduse anotherwrenchtoslowly
loosenthecap nut,allowinganyresidualsteampressuretodissipate.
3. Whilesecuringthelocknutwithawrench,insertascrewdriverintotheslotontheadjustingscrewandslowly
beginturningclockwise untilitstops.Thisisthe“0”position.
4. Consultthetables onthefollowingpage todeterminethenumberofturnsrequired toachieve thedesired set
conditions.
5. Tosetthetrap,turntheadjustingscrewcounterclockwise,notingthenumberofturnsfromthe“0”position.
Forsimplicityandgreateraccuracyofadjustment,use the“AdjustmentScrewTurnGauge”templateinthis
manual.Itcanbecutoutandplaced overthecoverforreferenceoncethecap nutisremoved.
6. Continueadjustingthescrewthepropernumberofturnsuntilthesetpositionisachieved.Dependingonthe
numberofturnsrequired,it maybeadvisabletoremovethewrenchfromthecapnuttoallowforeasier
adjustment.
7. Oncethesetpositionisachieved,holdthepositionoftheadjustingscrewwiththescrewdriverandtightenthe
locknuttothepropertorqueasindicated inthismanual.
8. Ifthetemperaturemustbe readjusted foranyreason,itisrecommendedtoreturnthesettingtothe“0”
positionbeforebeginning.Consultabove forinstructions.
AdjustingScrew TurnGauge
PAGE2
Thetrapsarefactoryset asfollows:175 °Fat120psig(1.6turns–counterclockwise-fromthe“0”position)
Note:The “0”position isdefined asthe clockwiseturning ofthe adjustmentscrewtothe
pointthatitstops.The factorysetting of1.6turns–counterclockwise–from“0”is
indicated byanotchonthe topoftheadjusting screwaligned withasimilarnotchon the
cover.Theheightofthe adjusting screwabovethecoverisalsostamped intothe cover
forfuturereference. If necessarytoreturntothe “1.6turn”position at anytime, adjust the
screwtotheheightindicated on the cover,making certainthe notcheson the screwand
coverarealigned.Consultthe “Discharge SetTemperatureAdjustmentChart”belowto
determine the correctnumberturnstoachievethe desiredconditions.Thisshouldbe
done priortomaking anyadjustments.

Example: For acapacityrequirementof300lb/hrat100 psipressuredifferentialandadesireddischarge
temperatureof250°F,firstentertheFLOWtabletodetermineaturnrequirementof1.Thenenterthe
TEMPERATUREtabletodetermineaturnrequirementof2.8.Therefore,thetotalnumberofturnsoftheadjusting
screwfromthe“0”positiontoachievetheaboveconditionsis1+2.8=3.8
NumberofAdjustmentScrewTurns-basedonFLOWrequirements
Capacity
lb/hr
PressureDifferential,psi
25 50 75 100 150 200 250 300 350 400 450
25 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.0 0.0 0.0 0.0
50 0.3 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1
100 0.7 0.5 0.4 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.2
200 1.3 0.9 0.8 0.7 0.5 0.5 0.4 0.4 0.4 0.3 0.3
300 - - 1.1 1.0 0.8 0.7 0.6 0.6 0.5 0.5 0.5
400 - - - 1.3 1.1 0.9 0.8 0.8 0.7 0.7 0.6
500 - - - - 1.4 1.2 1.0 1.0 0.9 0.8 0.8
600 - - - - - - 1.3 1.1 1.1 1.0 0.9
700 - - - - - - - 1.3 1.2 1.2 1.1
800 - - - - - - - - - 1.3 1.2
NumberofAdjustmentScrewTurns
-
basedon
TEMPERATURErequirements
Discharge Temperature,°F
120 150 175 200 225 250 300 350 390
0.6 1.1 1.5 2.0 2.4 2.8 3.6 4.5 5.2
M
AINTENANCE
I
NSTRUCTIONS
1. Thetrapshouldbe disassembledperiodicallyfor cleaningofthestrainerscreen,andinspectionandcleaningofthe
bimetallicelementandseat.
2. Isolatetrapfrombothsupplyandreturnlinepressures.Waituntiltrapcanbe comfortablytouched byhandbeforeany
servicingisperformed.
3. Tocleantheplugandseatremovecoverandwipeplugandseatsurfaces withcleaningsolvent.CAUTION:Neveruseany
abrasives onvalve plugorseatingsurface.Ifpartsareworn,replacetrapcapsule.
4. CapsuleReplacementandReassembly–Ensurethatall gasketsurfacesarecleananddry.Replaceoldcomponentswith
entirecontentsofrepairkit.Reassembletrap componentsasnecessary,ensuringappropriatecomponentsaretightened
properlytothetorquevalues noted previouslyinthismanual.
I
NSTALLATION
&
S
TART
-
UP
1.Beforeinstallingthetrap,blowoutpipingthoroughlytoremoveloosescaleanddirt.Observe thepressurelimitations
shownonthetrap label.
2.Afterremovinganyprotective sealsorplugs,installthetrapbelowsteampipinginalocationeasilyaccessiblefor
maintenanceandinspection.Becertaintoinstall withflowinthedirectionindicatedoneitherthetrap bodyor tag.
3.Trapshouldbeinstalled inappropriatelysizedpipingforeithertracingorsmall process applications.
4.Toprovide foreasy maintenanceandservice,installisolationvalves oneachside ofthetrap.Althoughthetrap
includesascreen,itisrecommended toinclude anadditionalupstreamstrainer.
5.Ifdischarge pipingistobe elevated,becertainthattheavailabledifferentialpressureisadequatetopermitproper
drainage.(Twofeetofliftequalsapproximatelyonepsiofhead pressure.)
6.Ifnot requested atthetime oforderandthecondensatedischarge temperaturewas notset,thenfield-adjustmentis
requiredprior tooperation.Consult belowforsettinginstructions.
7.For start-up,opentheoutletisolationvalve fully.Thengraduallyopentheinletisolationvalve,allowingpressureto
buildslowly.
PAGE3

CLEAN-OUTFUNCTION
1. Turnsteamoff byfirstclosingtheinletisolationvalve,followed byclosingtheoutletisolationvalve.
Make certaintrap has cooled toroomtemperaturebeforefurtherservicing.
2. Whileholdingthecoverwithawrench,slowlyloosenandremovethecapnutwithanotherwrench.Be
cautiousofanypotentialresidualpressurizedsteam.
3. Notethecurrentpositionoftheadjustingscrew.
4. Use aflat-headed screwdrivertoholdtheadjustingscrewinplaceanduse awrenchtoslowlyremove
thelocknut.Donotallowtheadjustingscrewtorotate.
5. Toloosendebris,slowlytightentheadjustingscrewuntil itstops,notingthenumberofturnsrequired
(asthiswillbeusedtoreturntheunittoitsoriginalsetpositioninalaterstep).
6. Slowlyloosentheadjustingscrewuntilitstops topreparethetrap forflushing.
7. Replacethecapnutandtightenit tothepropertorque.
8. Turnsteamontothetrap by firstfullyopeningtheoutletisolationvalve followed by slowlyopeningthe
inletisolationvalve.Allowsteam toflushthetrapfor approximately10-15 seconds,not exceeding30
seconds.
9. Onceagain,turnthesteamoff asinstructedinStep#1.Aftertraphascooledtoroomtemperature,
removethecap as instructed inStep #2.
10. Slowlytightentheadjustingscrewuntilitstops –thisisthestartingpositionforsettingthetrap.Using
thenumberofturnsnotedinStep#5,slowlyloosentheadjustingscrewuntiltheoriginalsetpositionis
achieved.
11. Replaceandtightenthelocknutwhileholdingtheadjustingscrewinplacewithaflat-headed
screwdriver.
12. Replacethecapnutandtightenit tothepropertorque.
13. Turnthesteamontothetrapby firstfullyopeningtheoutletisolationvalve followed by slowlyopening
theinletisolationvalve.Allowsufficienttimeforsystem tostabilizebeforecheckingtheset
temperature.
PAGE
4