Siemens VGD20.253U Owner's manual

SiemensAGBuildingTechnologiesDivision
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VGDSeries
TechnicalInstructions
DocumentNo.7631
VGDxx.xxxU
November08,2017

VGDxx.xxxUGasValves
forusewithSKPxx.xxxUelectro‐hydraulicactuators

VGD20.xxxUVGD40.xxxU

ISO9001and14000
REGISTEREDFIRM
  

OnlywithseriesSKPxx.xxxUxactuators
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DescriptionThenormallyclosedVGDxx.xxxUseriesofmodulardouble‐bodygasvalvescombine
withSKPxx.xxxUserieselectro‐hydraulicactuatorstoprovidesafetyshut‐off,gas
pressureregulationand/orair‐gasratiocontrolforcommercialorindustrialgas
burners.

Table1.VGDxx.xxxUmodelnumbers
ModelNumbersBodystyleConnection
VGD20.253UDoubleNPTthread
VGD20.323UDoubleNPTthread
VGD20.403UDoubleNPTthread
VGD20.503UDoubleNPTthread
VGD40.065UDoubleNPTthread
VGD40.080UDoubleNPTthread
VGD40.100UDoubleANSIflange
VGD40.150UDoubleANSIflange
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

TechnicalInstructionsVGDSeriesDoubleValves
DocumentNumberCC1N7631us 
November08,2017
Page2SiemensAGBuildingTechnologiesDivision

Features
AllModels
ULlisted,FMapproved,CSAcertified,IRIapprovable,ISO9001and14000certified.
CE,Australianapprovedversionsavailable
¼“‐inchNPTpressuretapsontheinletandoutletandbetweenmainvalves(seeTable2
fordetails)
Stainlesssteelmeshinletfilterprotectsthevalveseat(s)aswellasdownstream
components
Dualstemguidesensureprecisediscalignmentandtightshut‐off
ValvesinconnectionwithSKPxx.xxxUactuatorsopenslowlyandcloserapidly
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VGD20.xxxUmodelsCompactVGD20.xxxUdouble‐valvebodiesconsistof2safetyshut‐offvalvesinseries.
Thefirst(inlet)valvehasaflatvalvediscapplicableforsafetyshut‐offfunctiononly.
Thesecond(outlet)valvehasacontouredvalvediscforusewithpressureregulating
actuators(SKP2x.xxxU,SKP5x.xxxU,SKP7x.xxxU)
A1‐inchNPTventconnectionbetweenthevalves
EachVGD20.xxxUdouble‐valverequires2threadedmountingflanges(AGFxx.xxU).Each

flangeincludesthenecessaryinstallationhardware(bolts,nutsandO‐ring).Eachmounting 
flangehasa¼‐inchNPTpressuretap.Theflangescanbepre‐mountedontothepipe,and 
thenboltedontotheVGD20.xxxUgasvalvebody.Thisfeatureeliminatestheuseofpipe 
unionsandpermitsthegasvalveassemblytobeeasilyremovedfromagastrain
Connectingpatternofthe1...2inchAGFxx.xxUflangesareidentical.Thisspacepermits
anyAGFxx.xxUflangetobemountedtoanyVGD20.xxxUvalvebody

NOTE:
VGD20.xxxUvalvesandAGFxx.xxUflangesmustbeorderedasseparateitems(see
Tables2and3).

VGD40.xxxUmodelsCompactVGD40.xxxUdouble‐valvebodiesconsistof2safetyshut‐offvalvesinseries
Eachindividualsafetyshut‐offvalvehasdoubleseatstoachievehighflow
Patentedseatconstructionwithindividualclosingspringforeachseattoassurereliable
shut‐offandhighclose‐offpressurerating
Fullportventlineconnectionplatesareavailable

NOTE:
VGD40.xxxUvalvesandAGA40.xxxxUventconnectionplatesmustbeorderedas
separateitems(seeTables2and3).


VGDSeriesDoubleValvesTechnicalInstructions
DocumentNumberCC1N7631us
November08,2017
SiemensAGBuildingTechnologiesDivisionPage3
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ApplicationAllVGDxx.xxxUvalvescanbecombinedwithanySKPxx.xxxUseriesactuator.Theactuator
canbemountedwhilethevalveisinstalledandunderpressure.

SKPxx.xxxUregulatingactuatorsareapplicableforbothlowandhighsupplygaspressure
applications,eliminatingexcessiveregulatorinventories.Maximumpressureratingsvary
withvalvesize(seeTable2).

AllVGDxx.xxxUvalvesperformthesefunctionsincombinationwitheachofthefollowing
actuators:

SKP15.xxxUSafetyshut‐off
SKP25.xxxUSafetyshut‐offandconstantpressureregulationorzerogovernor
SKP55.xxxUSafetyshut‐off,pressureregulationanddifferentialpressureair‐gasratio
control
SKP75.xxxUSafetyshut‐off,pressureregulationandadjustableair/gasratiocontrol

Sincemorethanonefunctioncanbeperformedbyasinglevalve,fewercomponentsand
fittingsarerequired‐significantlyreducingboththesizeandweightofthegastrain.In
addition,smallerdiametergasvalvescanbeused.Fordetailsonvalvesizingseetheflow
chart(figure3).
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CAUTION:
DonotoversizevalvesequippedwitharegulatingSKP2x.xxxU/SKP5x.xxxU/
SKP7x.xxxUactuator.Oversizingmaylimitturndownandcouldcauseoscillations.

TechnicalInstructionsVGDSeriesDoubleValves
DocumentNumberCC1N7631us 
November08,2017
Page4SiemensAGBuildingTechnologiesDivision

Ordering
information
Gasvalvesandactuatorsareorderedseparately.ForadditionalSKPxx.xxxUactuator
information,seethefollowingtechnicalinstructions:
SKP15.xxxU155‐751P25
SKP25.xxxU155‐752P25
SKP55.xxxU155‐753P25
SKP75.xxxU155‐754P25

NOTE:
TheSKPxx.xxxUactuatorshaveanoperatingtemperaturerangeof14°Fto140°F
(‐10°Cto60°C)!

Table2.Productnumbers
Product
number
SizeMaximum
operating
pressure
psi
Close‐off
pressure
psi
Capacity
CFH
Naturalgas
at
P=1"W.C.
Numberoftest
points,
1/4"NPT
Valvebody
material
InletOutlet
VGD20.253U*)1"2030600Two¼‐inchand
one1‐inchport
betweenvalves
Aluminum
VGD20.323U*)1¼" 20301200Aluminum
VGD20.403U*)1½"20301,850Aluminum
VGD20.503U*)2"20302,300Aluminum

VGD40.065U2½"NPT10753,88011Aluminum
VGD40.080U3"NPT10755,37011Aluminum
VGD40.100U**4"flanged10309,68011Aluminum
VGD40.150U**6"flanged103017,49011Aluminum
*)VGD20.xxxUdoublevalvesrequire2AGFxx.xxUthreadedflangesforinstallation
**)VGD40.1x0Uflangedvalvesmustbeinstalledusingnon‐metallicflangegaskets.Gasketmaterialmustbechemically
compatiblewiththefuelgasbeingusedintheapplicationandmustbesofterthanthealuminumflangesealingsurface.
Acceptablegasketmaterialsincludebutarenotlimitedto:rubber,paper,andplastic.Observeflangebolttorque
specificationsasstatedintheVGD40installationinstructions.AlsorefertoANSI/ASMEB16.24.


VGDSeriesDoubleValvesTechnicalInstructions
DocumentNumberCC1N7631us
November08,2017
SiemensAGBuildingTechnologiesDivisionPage5

Accessories
Table3.Accessories
PartNumberDescriptionNotes
AGF10.25USingle1"connectingflangewith¼"portforVGD20.xxxU2requiredpervalve.
Orderseparately
AGF10.32USingle1¼"connectingflangewith¼"portforVGD20.xxxU
AGF10.40USingle1½"connectingflangewith¼"portforVGD20.xxxU
AGF10.50USingle2"connectingflangewith¼"portforVGD20.xxxU

AGA40.4050U1”NPTventconnectionplateforVGD40.xxxUEachventconnection
includes¼”NPTtestport,
seeMountinginstruction
M7631.3(7431902780)
AGA40.6580U1¼”NPTventconnectionplateforVGD40.xxxU
AGA40.0100U2”NPTventconnectionplateforVGD40.xxxU
AGA40.0150U2½”NPTventconnectionplateforVGD40.xxxU

AGA61

ManualadjustingthrottleattachmentAGA61permitsVGDxx.xxxUseriesvalvestobeusedas

adjustablelimitingorificevalves.Onceadjusted,theAGA61hasaprovisiontobesealedfrom
tampering.
  
AGA66

SealinggaskettoprovideNEMA3,NEMA3R,andNEMA4protection.
GasketkittomountSKPxx.xxxU
‐PlacebetweenactuatorSKPxx.xxxUandvalveVGDxx.xxxU
‐IncreasesdegreeofprotectionfromIP54toIP65
‐RefertoMountingInstructionM7643.2(7431904210)


TechnicalInstructionsVGDSeriesDoubleValves
DocumentNumberCC1N7631us 
November08,2017
Page6SiemensAGBuildingTechnologiesDivision

Specifications

Approvals
Agencyapprovals/standardsUL/429,FM/7400,
CSA/ANSIZ21.21/CSA6.5C/I
IRIapprovable
AgencymarksapplyonlyforVGDxx.xxxUseries
gasvalvebodiesassembledwithSKPxx.xxxU
actuators.

Operating
environment
MaximumoperatingpressureSeeTable2
Maximumbackpressure(differential)VGD20.xxxU:2psi(150mbar)
 VGD40.xxxU:4psi(300mbar)
Close‐offpressureSeeTable2
Permissiblegastemperature14°Fto140°F(‐10°Cto60°C)
Permissibleoperatingtemperature14°Fto140°F(‐10°Cto60°C)

UseSiemensgasvalvesareinaccordancewithUL429.

Thevalveisusedas:
‐Safetyshutoffvalve(inconnectionwithSKP15.xxxU)
‐Controlvalvewithsafetyshutofffunction(inconnectionwithSKP25.xxxU,SKP5x.xxxUor
SKP7x.xxxU)

Perm.mounting
position
7631z01us/0815


OperatingpressureSeeTypesummary

TypesofgasesSuitablenaturalgases,propane,butaneandair

FormoreinformationseeUse.

StrainerBuilt‐in,meshsize0.9mm


VGDSeriesDoubleValvesTechnicalInstructions
DocumentNumberCC1N7631us
November08,2017
SiemensAGBuildingTechnologiesDivisionPage7

Specifications

Physical
characteristics


BodymaterialsSeeTable2
Weight SeeTables4

ConnectionsPipeconnectionsNPTthreadsorANSIclass150flanges
(seeTable2)
PressureandventtapsSeeTables2and3

OperationAllVGDxx.xxxUgasvalvesarenormallyclosed,two‐wayvalves.Thevalveshaveastandard,
integral,stainlesssteelmeshfilter(0.9mm)intheinlettoprotectthedownstream
componentsagainstcontamination.

Allvalveshave¼NPTportsforpressuretestconnection.Afullsizeventconnectionplateis
availableasanaccessoryforVGD40.xxxUvalves.
SeeTable2and3fordetailsonportsandventconnectionplates.


AGF10... AGF10...
7631z50us/0815
Figure1.SectionalviewofVGD20.xxxU

VGD20.xxxUdoublevalvesconsistoftwovalvesinseries.
Thefirst(inlet)valvehasaflatvalvediscsuitableforthesafetyshut‐offfunctiononly.
Thesecond(outlet)valvehasacontouredvalvediscforstableregulatingcontroland
smoothreleaseofgas.


TechnicalInstructionsVGDSeriesDoubleValves
DocumentNumberCC1N7631us 
November08,2017
Page8SiemensAGBuildingTechnologiesDivision

Operation,continued

7631z53us/1215


Figure2.SecondviewofVGD40.xxxUflangemodels

VGD40.xxxUdoublevalvesconsistoftwovalvesinseries.
Eachvalvehasadoubleseattoachievehighflow(seeFigure2).

Closingsprings:
Eachdoubleseatusesonepairofsprings.Thespringforcesactseparatelyasclosing
forcesontheindividualvalveseats.


VGDSeriesDoubleValvesTechnicalInstructions
DocumentNumberCC1N7631us
November08,2017
SiemensAGBuildingTechnologiesDivisionPage9

Gasflowcharts

100 2 3 4 5 7 1000 2 3 4 5 7 10000 2 3 4 5 7 100000 2 3
7 100 2 3 4 5 7 1000 2 3 4 5 7 10000 2 3 4 5 7 100000 2
7 100 2 3 4 5 7 1000 2 3 4 5 7 10000 2 3 4 5 7 100000 2
100 2 3 4 5 7 1000 2 3 4 5 7 10000 2 3 4 5 7 100000 2 3
3 4 5 7 10 2 3 4 5 7 100 2 3 4 5 7 1000 2 3 4 5 7
cf/h Natural gas 0.64
1
cf/h Propane gas 1.52 2
cf/h Butane gas 2.00 3
cf/h Air 1.00 4
m3/h Air 1.00 4
Sp. Gr.
1,000
700
500
400
300
200
100
70
50
40
30
20
10
7
5
4
3
2
1
0,7
0,5
0,4
0,3
0,2
1,000
700
500
400
300
200
100
70
50
40
30
20
10
7
5
4
3
2
1
0,7
0,5
0,4
´´W.C. mbar
Pressure drop p
7631t06us/1215
VGD20...
V
GD40...
Figure3.Sizingdoublevalves

Assumptions:
1)Pressuredownstreamofvalveisatmospheric
2)Maximumgastemperatureof140°F
3)Valveinfullyopenposition


NOTE:
PressuredropistotaldropacrossbothvalveswhenusingaSKPx5.xxxUactuator,
withorwithoutanAGA66.



CAUTION:
DonotoversizevalvesequippedwithregulatingactuatorsSKP2x.xxxU,
SKP5x.xxxUorSKP7x.xxxU.Oversizingmaylimitturndownandcouldcause
oscillations.

TechnicalInstructionsVGDSeriesDoubleValves
DocumentNumberCC1N7631us 
November08,2017
Page10SiemensAGBuildingTechnologiesDivision

Dimensions
DimensionsinInches(mm)
VGD20.xxxU
AGF10...
AGF10...
1/4" NPT
DØ 3-1/8 (80)
2-3/4
(69)
2-1/2
(63.5)
2-1/2
(63.5)
3/4
(19)
3/4
(19.5) 2-7/16
(61)
4-1/16
(103)
1-1/4
(30)

Table4.VGD20.xxxUdimensionsininches(mm)with2flangesAGF10.xxU
ValvemodelNominalsizeD
inch
Length(L)
inch
(mm)
Weight
pounds
(Kg)
VGD20.xxxU1”10.59+2x1.02
(269+2x26)
7
(3.2)
1¼“10.59+2x1.02
(269+2x26)
7
(3.2)
1½“10.59+2x1.02
(269+2x26)
7
(3.2)
2”10.59+2x1.18
(269+2x30)
7
(3.15)
