Samson 4763 Manuale di servizio
Mounting and
Operating Instructions
EB 8359-2 EN
Edition April 2014
Type 4763 Electropneumatic Positioner
Type 4763 Electropneumatic Positioner
Denition of signal words
DANGER!
Hazardous situations which, if not
avoided, will result in death or seri-
ous injury
WARNING!
Hazardous situations which, if not
avoided, could result in death or seri-
ous injury
NOTICE
Property damage message or mal-
function
Note:
Additional information
Tip:
Recommended action
2 EB 8359-2 EN
Contents
EB 8359-2 EN 3
1 General safety instructions.............................................................................5
2 Article code...................................................................................................6
3 Technical data...............................................................................................7
3.1 Explosionprotectioncerticates.......................................................................9
4 Design and principle of operation ................................................................10
5 Attachment .................................................................................................12
5.1 Attachmenttovalvewithcastyoke ................................................................12
5.2 Attachmenttovalvewithrod-typeyoke..........................................................12
5.3 Housingcover .............................................................................................12
6 Connections ................................................................................................14
6.1 Electricalconnections ...................................................................................14
6.2 Pneumaticconnections..................................................................................15
6.3 Pressuregauge ............................................................................................15
6.4 Supplypressure ...........................................................................................16
7 Operation...................................................................................................17
7.1 Assignmentofthepositionerandtheactuator ................................................17
7.1.1 Determiningandchangingtheoperatingdirection .........................................18
7.2 Startingpointandreferencevariable.............................................................20
7.3 Adjustmentaftermountingthepositioneronthevalve.....................................20
7.3.1 Settingtheairdelivery(volumerestrictionQ)andproportionalbandXp ..........20
7.3.2 Settingforactuatorwithfail-safeaction“stemextends”...................................22
7.3.3 Settingforactuatorwithfail-safeaction“stemretracts” ...................................22
7.4 Exchangingtherangespring ........................................................................23
8 Converting the electropneumatic into a pneumatic positioner ........................24
9 Servicing explosion-protected devices ..........................................................26
10 Maintenance, calibration and work on equipment ........................................27
11 Accessories and mounting parts...................................................................28
12 Dimensions in mm.......................................................................................29
EB 8359-2 EN 5
General safety instructions
1 General safety instructions
Foryourownsafety,followtheseinstructionsconcerningthemounting,startupandopera-
tionofthepositioner:
−Thepositioneristobemounted,starteduporoperatedonlybytrainedandexperienced
personnelfamiliarwiththeproduct.
Accordingtothesemountingandoperatinginstructions,trainedpersonnelisreferredto
asindividualswhoareabletojudgetheworktheyareassignedtoandrecognizepossi-
bledangersduetotheirspecializedtraining,theirknowledgeandexperienceaswellas
theirknowledgeoftheapplicablestandards.
−Explosion-protectedversionsofthispositioneraretobeoperatedonlybypersonnelwho
hasundergonespecialtrainingorinstructionsorwhoisauthorizedtoworkonexplo-
sion-protecteddevicesinhazardousareas.
−Anyhazardsthatcouldbecausedinthevalvebytheprocessmedium,thesignalpres-
sureorbymovingpartsaretobepreventedbytakingappropriateprecautions.
−Ifinadmissiblemotionsorforcesareproducedinthepneumaticactuatorasaresultof
thesupplypressurelevel,itmustberestrictedusingasuitablesupplypressurereducing
station.
−Propershippingandstorageareassumed.
Note:
Devices with a CE marking fulll the requirements of the Directives 2014/34/EU and
2014/30/EU.
The Declaration of Conformity is available on request.
6 EB 8359-2 EN
Article code
2 Article code
Electropneumatic positioners Type 4763- x 1x0 0 xxxx0x0x x 0
Explosion protection
Without 0 2/7
ExII2GExiaIICT6GbaccordingtoATEX 1
CSA/FMintrinsicallysafe/nonincendive 3
ExII3GExnAIIT6Gc/ExicIICT6GcforZone2acc.toATEX
8 2/7
Spring
Spring1,travel=15mm 1
Spring2,travel=30mm,splitrange15mm 2
Spring3,travel=60mm,splitrange30mm 3
Pneumaticconnections
ISO 228/1 G ¼ 1
¼-18NPT 3
Electricalconnection(cablegland)
M20x1.5blue(plastic) 1
M20x1.5black(plastic) 2
M20x1.5(nickel-platedbrass) 7 2
i/pconverters
Type6109 1
Type6112 2
Referencevariable
4to20mA 0
0to20mA 2 2
1to 5mA 2 3
Temperaturerange
Standard 0
Lowtemperaturedownto–45°C 2 2
Specialversion
Without 000
Foroxygen1) 0/1 0 1 6
GOSTcerticate 8 2 0 1 0
1) Specialversionsuitableforoxygenuptomaximum+60°C
(accordingtoAIRLIQUIDEtestreportno.2014/R171a1)
EB 8359-2 EN 7
Technical data
3 Technical data
Controlledvariable(travelrange) 7.5to60mm,withleverextension:7.5to90mm
Referencevariable1)
Split-range0to50%or
50to100%
referencevariablespan
(upto50mmtravel)
4to20mA(Ex), Ri=250Ω2)
4to20mA(withoutexplosionprotection), Ri=200Ω2)
0to20mA, Ri=200Ω2)
1to5mA, Ri=880Ω2)
Rangespring SeeTable1onpage21
Supplyair 1.4to6bar(20to90psi)
Airqualityacc.toISO8573-1:Max.particlesizeanddensity:
Class4
Oilcontent:Class3·Pressuredewpoint:Class3
Signalpressurepst(output) Max.0to6.0bar(0to90psi)
Characteristic Linearcharacteristic·Deviationfromcharacteristicaccordingto
terminalpointmethod:≤1.5%
Hysteresis <0.5%
Sensitivity <0.1%
Operatingdirection Reversible
ProportionalbandXp(at1.4bar
supplyair)
1to3.0%withspring1
1to2.0%withspring2
1to1.5%withspring3
Airconsumptioninsteadystate
(Xp=1%)
With1.4barsupplyair:0.19mn³/h
With6barsupplyair:0.5mn³/h
Air output AtΔp1.4bar:3.0mn³/h
AtΔp6bar:8.5mn³/h
TransittimewithType3271
Actuator,“stemextends”
240cm²≤1.8s
350cm²≤2.5s
700cm²≤10.0s
Perm.ambienttemperature3),4) With Type 6109 i/p Converter:
–20to+70°C
–35to+70°C(metalcablegland)
With Type 6112 i/p Converter:
–20to+80°C
–40to+80°C(metalcablegland)
–45to+80°C(specialversion)
8 EB 8359-2 EN
Technical data
Inuences Temperature:<0.03%/1K
Supplyair:<0.3%/0.1bar
Vibrations:<2%between10upto150Hzand4g
Variablepositionwhenturnedby180°:<3.5%
Degreeofprotection IP54·Ventingovercheckvalve(1790-7408):IP65
Compliance ·
Electromagneticcompatibility ComplyingwithEN61000-6-2,EN61000-6-3andEN61326-1
Weight Approx.1.2kg
Materials
Housing Die-castaluminum,chromatedandplasticcoated
Externalparts Stainlesssteel
1) ThedatalistedinthecerticateofconformityappliestotheversionwithtypeofprotectionExiaIIC.
2) Ri=Coilresistance(atapprox.20°C)±7%tolerance
3) Observethelimitsinthecerticateofconformityforexplosion-protectedversions.
4) Withspecialversionsuitableforoxygenuptomaximum+60°C
EB 8359-2 EN 9
Technical data
3.1 Explosion protection certicates
Type Certication Type of protection
4763-1
Number RUCDE.08.00697
1ExiaIICT6/T5/T4GbXDate 15.12.2014
Validuntil 2019-12-14
4763-1
Number PTB02ATEX2078
II2GExiaIICT6Gb
Datum 2002-07-19
ECtypeexamination
certicate
4763-3 ®
Number 1607873 ExiaIICT6;ClassI,Zone0;
ClassI,II,Div.1,GroupsA,B,C,D,E,F,G;
ClassI,II,Div.2,GroupsA,B,C,D,E,F,G;
Date 2005-09-16
4763-3
Number 3020228 ClassI,Zone0AExiaIIC
ClassI,II,III;Div.1,GroupsA,B,C,D,E,F,G
ClassI,Div.2,GroupsA,B,C,D;
ClassII,Div,2GroupsF,G;ClassIII;
Date 2005-02-28
4763-7 JIS
Number TC14411
ExiaIICT6Date 2015-02-09
Validuntil 2018-03-01
4763-8
Number RUCDE.08.00697
2ExnAIICT6/T5/T4GcXDate 2014-12-15
Validuntil 2019-12-14
4763-8
Number PTB03ATEX2183X
II3GExnAicIICT6Gc
Date 2003-09-30
Statementof
conformity
10 EB 8359-2 EN
Design and principle of operation
4 Design and principle of oper-
ation
Theelectropneumaticpositionerisusedto
assignthevalveposition(controlledvariable)
totheinputsignal(referencevariable).The
positionercomparesthecontrolsignalofa
controlsystemtothetravelofthecontrol
valveandissuesasignalpressure(output
variable)forthepneumaticactuator.
Thepositionerconsistsofanelectropneumat-
icconverterunit(21)andapneumaticunit
equippedwithalever(1),shaft(1,1)and
rangespringaswellasthepneumaticcon-
trolsystemwithnozzle,apperplateand
booster.TheDCcontrolsignal,e.g.4to
20mA,issuedbythecontroller,istransmit-
tedtotheelectropneumaticconverterunit
(i/pconverter)whereitisconvertedintoa
proportionalpressuresignalpe.
Anychangeoftheinputcurrentsignalcaus-
esaproportionalchangeoftheairpressure
pefedtothepneumaticcontrolsystem.
Theairpressurepeproducesaforcewhich
actsonthesurfaceofthemeasuringdia-
phragm(8)andiscomparedtotheforceof
therangespring(6).
Themotionofthemeasuringdiaphragm(8)
istransferredtotheapperplate(10.2)over
thefeelerpin(9.1),andthenozzle(10.1)
releasespressure.Anychangeofeitherthe
airpressurepeorthevalvestemposition
causesthepressuretochangeinthebooster
(12)connecteddownstreamofthenozzle.
Thesignalpressurepstwhichisreleased
causestheplugstemtoassumeaposition
basedonthereferencevariable.
TheadjustablevolumerestrictionQ(14)and
Xp(gain)restriction(13)areusedtoopti-
mizethecontrolloopofthepositioner.
Therangespring(6),whichcanbeex-
changed,isassignedtoboththeratedvalve
travelandthespanofthereferencevariable.
Legend for Fig.1 and Fig.2
1Leverforvalvetravel
1.1 Shaft
2Pin
2.1 Nut
3Sleeve
4Zeropointadjustment
5Fasteningscrew
6Rangespring
6.1 Bracket
7Fasteningscrew
8Measuringdiaphragm
9Diaphragmplate
9.1 Feeler pin
10 Nozzleblock
10.1 Nozzle
10.2 Flapperplate
11 Coverplate
12 Booster
13 Xprestriction
14 VolumerestrictionQ
15 Holeforfasteningscrew
20 Plate
21 i/pconverter
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