Servo Tank Valve - philmac.com.au · make it easy to use a spanner or pipe wrench for installation....
Transcript of Servo Tank Valve - philmac.com.au · make it easy to use a spanner or pipe wrench for installation....
Servo Tank Valve Technical Information
18Valves TECHNICALMANUAL
MARK II SERVO TANK FILLING VALVES
Philmac’sAustralianmadeMarkIIservotankfillingvalveisdesignedtodeliverhigh
volumesofwaterveryquickly.
Duetotheuniqueservoaction,thevalverequiresonlyasmallfloat,whichmakesthem
idealforconfinedspaces.
Theuniquedesignofthesecondaryservoactionguaranteesshutoffatextremelyhigh
pressure.
ManufacturedfromhighgradematerialstheMarkIIservotankissuitableforarangeof
applicationssuchasfireservicewatertanks.
Fast and Easy Installation• MinimumSpaceRequiredfor
Installation:Basedonaservoactionthebodyhasasecondarychamberwhichassiststhelever/floatassemblyinclosingthevalve.Thisreducesthelengthofleverarmandfloatsizethatwouldotherwiseberequiredtocloseathighpressures.Withacompactbodydesignitmakesthemperfectfortightapplicationssuchasfireservicetanks.
• BSPInlet/OutletThreads:TheIndustrialandPlumbingsectorsuseBritishStandardPipe(BSP)threadsasastandard.Philmacalsousesthesethreadtypesacrossthevalverangetoensurecompatibilitywithotherthreadedfittingsmakinginstallationeasy.
• HexagonalInlet/Outlet:Boththeinletandoutletarehexagonalinshapetomakeiteasytouseaspannerorpipewrenchforinstallation.
• EasyDisassembly:ThevalveshavebeendesignedallowingeasyreplacementofthesealsandO-rings.Simplyremovethepivotpin,disconnecttheleverarmassemblyandremovethehexagonalseatbottomtoallowthepistonassemblytoslideoutandaccessthesealsandO-rings.
Complete Security• ServoSealingAction:Byallowingwater
intothetopchamberofthebodyit
providesanadditionalorsecondary
forcetothepistontoassistthelever/
floatassemblyandprovidecomplete
shutoff.
• CorrosionResistant:Withagunmetal
body,316stainlesssteelseat,DZR
brasscomponents,polypropylenesplit
ring,nitrileO-ringsandseals,thevalve
ismanufacturedusinghighcorrosion
resistantmaterials.
• FloatSecurity:Theleverarmhasbeen
designedsothatthecopperfloatslides
overtheleverarmandissecuredwith
acotterpintopreventitcomingloose.
Inaddition,byslidingthefloatontothe
leverarmitensuresforceisappliedto
thecompletefloatnotjustasocketon
theend.Thisensuresreliableoperation.
• Approvals:Allvalvescomplywith
Australian/NewZealandStandard4020
whichmeansthevalvesaresuitablefor
usewithdrinkingwater.
High Performance• ManufacturedfromDZRbrass:The
brasscomponentsinPhilmacservo
tankfillingvalvesaremanufacturedfrom
dezincificationresistant(DZR)brass.
Thismeansthebrassisresistantinsoil
andwaterenvironmentstocorrosion
involvingthelossofzincleavinga
residueofspongyorporouscopper.
• Highpressureshutoff:Servotank
fillingvalvesareratedtoapressure
of2000kPa(290psi)or20bar(static
shutoff)at200Celsiustomeetthe
requirementsofhighpressuresystems.
Complete Coverage• Widerange:Therangeofservotank
fillingvalvesiscomprehensiveandincludes
1½",2"and3"(DN40,50and80).
BENEFITS
Agriculture:Watertanksonboreschemes.
Plumbing:Watertanksfordrinkingwaterandfireservicetanks
APPLICATIONS
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Philmac’srangeofservotankfillingvalves
aredesignedtocomplywiththefollowing
standardsandundertakearangeof
teststoensuretheycomplywiththese
standards.
StandardsAS/NZ4020:Testingofproductsforuse
incontactwithdrinkingwater.
AS1722.1:PipethreadsofWhitworth
formpart1:sealingpipethreads.
ISO7:Pipethreadswherepressuretight
jointsaremadeonthethreads.
TestsShutOffTest:Valvesaretestedforshut
offagainstahydrostaticwaterpressureof
2000kPa(290psi)or20bar.
StrengthTest:Valvesaretestedfor
adequatestrengthfortheirintended
application.Thisincludestestingatthe
maximumrecommendedoperating
temperatureandapressureof3000kPa
(435psi)or30bar.
STANDARDS & TESTS
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MARK II SERVO TANK FILLING VALVES OPERATION & INSTALLATION INSTRUCTIONS
1. ApplyPTFEtapeorapprovedsealanttotheinletthreadensuringsufficientisappliedtoensureawatertightseal.
2. Screwintofemalethreadbyhanduntilfirm.
3. Usingapipewrenchormultigripsonthehexofthevalve,screwitintothefemalethreaduntiltight.Wherenecessaryensurethefemalethreadisheldstationarytoavoiditfrommoving.
4. Threadtheleverarmthrougha10”(255mm)copperfloat(ball)andtighten.
5. Fitthesplit(cotter)pinontheendofthearmtopreventitfromcomingloose.
6. Removethepivotpinfromthebodyandfittheleverarmthenensurethepivotpintabsareflaredoutwardbyusingasmallscrewdriver.
ThePhilmacservotankfillingvalvesoperatebyopeningandclosingapistonagainstaseatthroughtheactionofaleverarmattachedtoafloat.Theleverarmisinterconnectedtothesecondarypistonviaacam.
Asthewaterleveldrops,thefloatandleverarmmoveinadownwarddirectionandthesecondarypistonliftsallowingwaterinthetopchambertopassdownstream.Thesecondarypistonininterconnectedtothemainpistonandasitliftssodoesthemainpistonwhichmovesitawayfromtheseatandopensthevalve.
Whenthewaterlevelrises,thefloatandleverarmmoveinanupwardsdirectionandthesecondaryandmainpistonmovestowardstheseatuntilitsitsfirmlyagainsttheseat.Waterthenentersthetopchamberbypassingalongthesideofthemainpistonandthroughasmallslotinthepistonsplitring.Bydoingthis,waterpressureisappliedtothemainpiston.Thissecondaryorservoactioncombinedwiththeactionofthefloatandleverarmensuresthevalveshutsoff.
HOLES DRILLED IN PIPEFOR AIR GAP
BAFFLE PLATE
PIPE WITH 45º ELBOW
Schematicdiagramshowingatypicalinstallation
witheitherabaffleplatetominimisefloat
bounceorapipetodirectwaterawayfrom
thefloatandpreventfloatbounce.
Valves TECHNICALMANUAL21
SYSTEM DESIGN CONSIDERATIONS
Threads:AllthreadsareBSP(Whitworth
form).
MaximumOperatingPressure:3500kPa
(435psi)or35bar.
Sealingthreads:Philmacrecommends
sealingthreadswithPTFEtape.When
beingfittedtoametalthreadan
approvedmetalsealantcanbeused.
Operatingtemperature:Connectionis
coldwater(lessthan200C)rated.
Weathering:Allnon-ferrousmaterials
areprotectedfromtheaffectsofUV.
AirGap:Whenconnectingtodrinking
watertheinstallationshouldcomplywith
therelevantairgapstandardstoprevent
backsiphonage.
Flow Rates (L/min)
Inlet Pressure
(kPa)
Inlet Size
1 ½” (DN40)
2” (DN50)
3” (DN80)
100 420 600 1440
150 510 720 1680
200 600 840 1960
250 670 960 2170
300 730 1020 2290
350 770 1080 2460
400 800 1140 2580
450 830 1220 2700
500 900 1300 2820
Valveselectionshouldbedirectlyrelatedtodemandandnottopipesize.Theflow
requiredshouldbedeterminedatagivendynamicpressureandthenthevalve
shouldbeselectedfromthetableabove.
CHEMICAL RESISTANCE
Philmac’sservotankfillingvalvesare
primarilydesignedtoconveywater.
Howevertheremaybeoccasionswhere
thewatercontainschemicalsand/or
alternativefluidsneedtobecontrolled.The
followingtableisprovidedasa guide only
forthecompatibilityofvariouschemicals
andalternativefluidstoPhilmacservo
tankfillingvalves.Themixingtogetherof
chemicalsmayaffectthecompatibility.
Chemical CompatibilityAcetic acid (10%) NAcetic acid (50%) NAlcohol (ethanol) NAmmonium nitrate NAntifreeze RBrine RCalcium carbonateCalcium chloride NCalcium nitrateCalcium sulphateChlorine water NCitric Acid NCopper Sulphate >5% NDiesel (fuel) REthyl alcohol (ethanol) NHydrochloric acid (10%) NHydrochloric acid (30%) NKerosene RLubricating oils (not synthetic) RMagnesium nitrateMagnesium sulphate RMineral oils RNitric acid (10%) NNitric acid (40%) NOlive oilOrange juicePetrolPhosphoric acid (85%) NDrinking water RPotassium chloride NPotassium nitrate RPotassium sulphate NSodium bicarbonate NSodium hypochlorite (<10%) NSulphuric acid (10%)Sulphuric acid (30%)UreaZinc nitrateZinc sulphate R
N=NotRecommendedR=ResistantEmptyCell=Nodataavailable
Noterecommendationsbasedon
fluidsat200Corless
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MARK II SERVO TANK FILLING VALVES MATERIAL & COMPONENTS
Servo Tank Filling ValveSize Nominal
SizePart
NumberBody Body Cap Pivot Pin Cam Lever Cotter Pin Seat
Bottom
1½” DN40 90381500 Gun Metal DZR brass DZR brass DZR brass DZR brass DZR brass DZR brass + 316 S/S
2” DN50 90381600 Gun Metal DZR brass DZR brass DZR brass DZR brass DZR brass DZR brass + 316 S/S
3” DN80 90381700 Gun Metal DZR brass DZR brass DZR brass DZR brass DZR brass DZR brass + 316 S/S
Size Nominal Size
Part Number
Piston - Main
Piston Seat Retainer
Screw Retainer
Seat Seal O-ring Split Ring
1½” DN40 90381500 DZR brass DZR brass DZR brass DZR brass Nitrile rubber
Nitrile rubber
Polyethylene
2” DN50 90381600 DZR brass DZR brass DZR brass DZR brass Nitrile rubber
Nitrile rubber
Polyethylene
3” DN80 90381700 DZR brass DZR brass DZR brass DZR brass Nitrile rubber
Nitrile rubber
Polyethylene
PIVOT PIN
CAM
LEVER
COTTER PIN
PISTON
O-RING
SEAT
BODY
BODY CAP
SPLIT RING
SEAT RETAINER
SEAT WASHER
PISTON - MAIN
SCREW RETAINER
SEAT WASHER
SEAT RETAINER
O-RING
SEAT BOTTOM
INLET
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MARK II SERVO TANK FILLING VALVES RANGE & DIMENSIONS
Size(A)
Nominal Size
B C D E F G H I J K
1 ½” DN40 110 165 70 1½” 760 255 260 ½“ BSW 750 135
2” DN50 110 170 80 2” 890 255 260 ½“ BSW 860 135
3” DN80 145 225 110 3” 1040 255 410 ½“ BSW 1000 135
All dimensions in millimetres unless otherwise stated
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