Sealy SGA3/FBA User manual

OXYGEN/FUEL FLASHBACK
MODEL NO’S: SGA3/FBA, SGA4/FBA
Thank you for purchasing a Sealey product. Manufactured to a high standard, this product will, if used according to these instructions,
and properly maintained, give you years of trouble free performance.
IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS & CAUTIONS. USE
THE PRODUCT CORRECTLY AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE DAMAGE AND/OR
PERSONAL INJURYAND WILL INVALIDATE THE WARRANTY. KEEP THESE INSTRUCTIONS SAFE FOR FUTURE USE.
Refer to
instruction
manual
SGA3/FBA, SGA4/FBA Issue 1 16/12/2022
Original Language Version
© Jack Sealey Limited
Wear eye
protection
1. SAFETY
1.1. SPECIFIC FLASHBACK ARRESTOR SAFETY WARNINGS
9 Theinformationontheashbackarrestorsuchasdescriptionofgas,maximumoperatingpressureanddirectionofowsignhas
 tobefollowed.
9 Morethanonecomponentshouldn’tbeconnectedtotheashbackarrestor.
9 Nomarking(e.g.itemnumber,dateofrstoperationetc.)byscratchingorpunchingisadvised.Underthesecircumstances,
9 Flashbackarrestormaygetdamagedandleakagemayoccur.
9 Flashbackarrestorsshouldbeusedaccordingtotheinformationmarkedonthem.
9 Theseproductsaremanufacturedbylatesttechnologyregardingtospecifytechnicalrules,presentstandardsandinstructions.
9 Usermustfollowtherecommendationsinthismanual.
9 Sta󰀨thatuseweldingequipmentandtheircomponentsshouldhaveknowledgeabouttheseprocessesorbetrainedbyregisteredby
 institute/sta󰀨accordingtocurrentregulationsinplace.
9 Alwayshaveareextinguishernearby.
9 Itisimportanttoreadtheinformationontheashbackarrestorwhichgivesadescriptionofgas,maximumoperatingpressureand
 directionofowwhichneedstobenotedandobserved.
9 Morethanonecomponentshouldn’tbeconnectedtotheashbackarrestor.
1.2. SITUATIONS THAT MAY CAUSE FLASHBACK
9 Whencuttingtorchisdamagedorusedincorrectly.
9 Whenhighpressurizedoxygengasmixedinthelowpressurizedammablegasttingasaresultofwrongadjustmentofoperating
pressures.
9 Whencomponentsconnectedwhicharenotsuitableforeachother.
9 IftheOxygencylinderrunoutofgas;ammablegasowsinsidetheoxygencylinderreverselythroughregulator.
9 Whenuntutoredandinexperiencedusersusetheproducts.Wheninstructionsarenotfollowed.
9 Whencomponentsareconnectedwiththewrongtools.
9 Usageofgasesorpressuresdi󰀨erentthanoneswhicharedenedonthismanualandontheproduct.
9 Whenproductisusedattemperaturesunder-20°Candover+60°C.
1.3.  Keepawayfromameatalltimes.Makesurethathosesarelaidatwherepossibleandnotinapositionwheretheycanbe
 runoverbyvehicles,whichwouldresultinpermanentdamage.
9 Emptycylindersshouldbekeptinspeciedareasandclearlymarked‘EMPTY’.
8 Neveruseoilorgreaseonanyinletconnections,outletconnectionsorcylindervalves.
9 Examinehosesforcuts,burnsorwornareasbeforeeachuse.Alsoinspectttingsfordamage.Ifanydamageisfound,replace 
immediately.
8DO NOTrepairhoseswithtape.
9 Keepallthreadsandunionscleanandfreefromoil,dirtorgrease.
8 Neverapplyoilorgreasetoanythread.
9 Makesurebottlekeysareinplaceatalltimessothatintheeventofanemergencythevalvescanbeturnedo󰀨quickly.
9 LEAKINGHOSESCANKILL.Leaktestallconnectionsandvalvespriortoeachuseoftheequipment.
8DO NOTjoindamagedhoses,theymustbereplacedimmediately.
9 Rememberatalltimes BLUE=OXYGEN‘O’ RED=ACETYLENE‘A’.
8 Atnotimemayyouinterchangethispartwiththoseofothermanufacturers.
9 OnlySealeyreplacementitemsshouldbeused.
9 Allrepairs/calibrationsmustonlybeundertakenbyaBCGAapprovedserviceagent.
2. INTRODUCTION
 Protectsoperators,regulatorsandgassupplyfromtheconsequencesofsevereformsofashback.Colourcodedforeasy 
 recognition.ItalsoconformstoBSENISO5175-1:2017standard.

Original Language Version
© Jack Sealey Limited
3. SPECIFICATION
Model No:............................... SGA3/FBA /SGA4/FBA
Gas Type SGA3/FBA: .......................................Oxygen
Gas Type SGA4/FBA..................................... Acetylene
MaximumPressure ..............................................20bar
4. DEFINITIONS
4.1.  Flameashbackisfastmovementofametothesourceofgas
 (Cylinder,tank,installation,hoseetc.)whichisformedduring
 welding,cuttingetc.madebymixtureofoxygenandammablegas.
4.2.  Flashbackarrestorsaresecuritydevices,whichpreventtheowof
 gasduringashback.Thearrestorpreventstheamespreadto
 gassourcebyblockingtheameandstoppinggasow.
5. FUNCTIONS REFER TO FIG.2
5.1. THERMAL CUT-OFF VALVE
 Thespringinsidetheashbackarrestorblocksthevalvewhichiscontinuouslypressedagainstthegasowdirection.Whename
 ashbackoccurs,thesolderwhichholdsthespring,meltswiththehightemperature.Thespringisthenreleasedandthe 
 connectedvalvestopsgasow.
5.2. FLAME ARRESTOR
 Astainlesssteellterstopstheamereachingtheashbackarrestorandpreventsitreachingthesourceofgas.
5.3. GAS NON-RETURN VALVE
 Preventsthegasowinginreversedirection.
5.4. WORKING PRINCIPLES
5.4.1. Thespringinsidetheashbackarrestorforregulatorsblocksthevalvewhichiscontinuouslypressedagainsttogasowdirection.
5.4.2. Thepressureoftheowinggasreleasesthecompressionofspringandpermitsthegasowthroughthetorch.
5.4.3. SinteredstainlesssteelCr-Nidesignedlterinsidetheashbackarrestorholdstheameforashback.
5.4.4. Thesoldermeltsduringanyameashbackifthetemperaturereaches100°C,pinfreesfromthesolderandcutsthegasow.
5.4.5. Afterthatashbackarrestorcannotbeusedanymoreandshouldbechanged.
6. ASSEMBLY REFER TO FIG.1
6.1.  Checkallconnectionsthattheyarecleanandundamagedbeforeassembly.
6.2.  Assembletheproductaccordingtothedirectionofgasow.
6.3.  Checkforleakageatmaximumoperatingpressureafterassembly.
6.4. Hoses and their connections must meet current standards in place.
6.5.  Hosesshouldbexedinasuitablemanner(e.g.hoseclamp).
6.6.  Tightenthearrestorconnectionsusingasuitabletool.
▲DANGER: For the productswhichareusedforOxygen,allconnectionsandunitsshouldbefreeofgrease.
7. MAINTENANCE
7.1.  Theashbackarrestorsaretobetestedbyaqualiedandauthorisedpersonatregularintervalsaccordingtoregulationsinplace.
7.2.  Theashbackarrestoristobetestedforgastightnessandgasreturnaccordingtoregulationsinplace.
7.3.  Couplingsarewearingpartsandhavetobetestedbyaqualiedandauthorisedpersonaccordingtoregulationsinplace.
 Thesetestshavetobeperformedwhenthecouplingsconnectedaswellasdisconnected./TRANSPORTATION
7.4.  Storetheproductinsidethepackageduringtransportationtoavoiddamage.
7.5.  Productshouldbestoredinitspackaginguntilused.Keepawayfromgreaseandotherdirtsources.
7.6.  Productsshouldbestoredintemperaturesbetween+5°Cand+35°Candkeptawayfromdustandhumidity.
8DO NOTuseproducts,whicharedamagedduringtransportationorstorage.     
g.1
g.2
SGA3/FBA, SGA4/FBA Issue 1 16/12/2022

Sealey Group, Kempson Way, Suffolk Business Park, Bury St Edmunds, Suffolk. IP32 7AR
01284 703534 [e-mail] www.sealey.co.uk
ENVIRONMENT PROTECTION
Recycleunwantedmaterialsinsteadofdisposingofthemaswaste.Alltools,accessoriesandpackagingshouldbesorted,
takentoarecyclingcentreanddisposedofinamannerwhichiscompatiblewiththeenvironment.Whentheproduct
becomescompletelyunserviceableandrequiresdisposal,drainanyfluids(ifapplicable)intoapprovedcontainersand
disposeoftheproductandfluidsaccordingtolocalregulations.
Note:Itisourpolicytocontinuallyimproveproductsandassuchwereservetherighttoalterdata,specificationsandcomponentpartswithoutprior
notice.
Important:NoLiabilityisacceptedforincorrectuseofthisproduct.
Warranty:Guaranteeis12monthsfrompurchasedate,proofofwhichisrequiredforanyclaim.
Original Language Version
© Jack Sealey Limited
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PURCHASE HERE
8. TROUBLESHOOTING
No gas ow. Checkowdirection,workingpressure,shut-o󰀨valve,gassource,cuto󰀨
valveandthecouplingisn’tlockedo󰀨.
Pressure sensitive gas cut-o󰀨 valve PV. Agreencollarcoversaresetcollar.Inordertoresettheuserhastolook
forthecauseoftheashback,thenmovethesleeveinthedirectionofthe
arrow.Providingthecauseisfound,thesafetydevicecanberesetandwork
can resume.
The thermal shut o󰀨 valve was activated TV. Thedevicehastobereplaced.
External tightness. Dustanddamagescancauseleakageofcouplingsandcouplingpins.
Therefore,theyhavetobecheckedaccordinglyandreplacedifnecessary.
Gas return NV. Thedevicehastobereplaced.
Leaking in disconnected situation. Unittobeexchanged(onlythosewithaintegratedcoupling).
SGA3/FBA, SGA4/FBA Issue 1 16/12/2022