Sealey SGA4/FBA Acetylene Flash Back Arrestor 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 INJURY AND 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

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.

8 DO 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.

8 DO 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

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.

8 DO 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 sales@sealey.co.uk 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

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

Sealey SGA4/FBA Acetylene Flash Back Arrestor

Product's Documents

Instructions

Specifications

Sealey SGA4/FBA Questions and Answers