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  3. BP420 Series

Dynisco BP420 Series User manual

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From lab to production
providing a window into the process
P/N974183 REVB ECO#50337 Page1of3
DyniscoBP420BurstPlugs
Reliable,SecurePressure‐ReliefSystem
InstallationInstructions

From lab to production
providing a window into the process
P/N974183 REVB ECO#50337 Page2of3
WARNING:
a. Readthecompleteinstructionsbeforeattemptingtoinstalltherupturedisk.
b. Itistheuser’sresponsibilityforthedesignofadequateventing andinstallationofadequate vent
piping or directional flow after rupture occurs with the rupture disk as intended. When size is
specified,DyniscoLLCassumesthatadequateprovisionshavebeenmadebythepurchaserand/or
userforproperventingofasystemtorelievethespecificpressure.Locatetherupturediskwhere
peopleorpropertywillnotbeexposedtothesystemdischargeintheeventofrupture.Venttoxicor
flammablefumestoasafelocationtopreventpersonnelinjuryorpropertydamage.
c. Itis the user’s responsibilitytospecifythe burst pressureratingatthecoincidenttemperatureat
which the rupture disk is to be used. A rupture disk is a temperature sensitive device. The burst
pressureoftherupturediskisdirectlyaffectedbyitsexposuretothecoincidenttemperature.Failure
toutilizearupturediskatthespecifiedcoincidenttemperaturecouldcauseprematurefailureorover
pressurizationofthesystem.
d. It is the user’s responsibility to ensure that the burst plug snout length and temperature are
appropriate so that after a rupture disk failure, molten plastic/media flows continually out of the
snout.Failuretodosocouldresultinpolymer/mediasolidifyinginthesnoutandoverpressurizing
ofthesystem.
Itisrecommendedthattheuserinstallandpressurizeasampleburstplugtoburstintheirsystem
toconfirmbytestthattheburstplugfunctionscorrectlyintheirparticularapplication.
e. Particlesmaydischargewhentherupturediskruptures.Theseparticlesmaybepartoftherupture
diskitself,orotherenvironmentalmatterinthesystem.Itistheuser’sresponsibilitytoensurethat
theparticlesaredirectedtoasafeareatopreventpersonnelinjuryorpropertydamage.
f. Rupturediskservicelifeisaffectedbycorrosion,creepandfatigue, and physical damage. These
conditionswillderatetherupturedisktoalowerpressure.Theusershouldbepreparedtohandlea
prematurefailureoftherupturedisk.Themediaorotherenvironmentalconditionsshouldnotallow
foranybuild‐uporsolidificationofmediaontherupturedisk.Thismayincreasetheburstratingof
therupturedisk.
g. Dyniscorupture disks,wheninstalled correctly,willprovide averygood sealforliquidsand most
gasesorvapors.However,Dyniscocannotguaranteetheleakagerateofthedisksealwithoutprior
knowledge of the requirements and details of the piping layout.ConsultDyniscoforguidanceif
leakageiscriticaltotheinstallation.
h. Thecustomerand/oritsinstallershallberesponsiblefortheproperinstallationofrupturediskdevice
intoasystem.Recommendedtorquevaluesdonotconsiderpipingstressoralignment.
i. Customersand/oritsinstallersshallberesponsibleforimproperinstallation andphysicaldamage
resultingtherefrom,including,butnotlimitedto,damageresultingfromleakage,impropertorquing,
and/orfailuretofollowinstallationinstructions.
j. Dynisco standard Terms and Conditions of Sale apply unless otherwise stated in writing by the
manufacturer.

From lab to production
providing a window into the process
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Removal,InspectionandPreparation:
1 RemovingtheexistingAssembly
a Depressurizetheequipmentbeforeattemptingtoremovetheassemblyevenifithasburst.
b Loosenandremovetheburstassemblywiththeappropriatetool.Takecarenottodamagethe
receivingequipment.
2 InspecttheReceivingEquipment
a Inspecttheseatareaforanyscratches,dents,ornicks.Imperfectionsonthesesurfacescan
causeleaks.DONOTUSEifanyscratches,dentsornicksaredetected,(contactDynisco
immediatelyforinstructions).
b Inspectandcleanthereceivingthreads,usethreadchaseorothersuitablecleaningdevice.
Threadsmustbeingoodconditiontoreceivetherupturediskdevice.UtilizetheDynisco
Machiningtoolkitforproperholesizing.
3 InspecttheRuptureDiskDevice
a Carefullyremovetherupturediskdevicefromitspackagingandchecktheseatarea,exposed
threadsandpre‐bulgedsurfaceofthediskforanyscratches,dents,ornicks.Imperfectionson
thesesurfacescancauseleaks.DONOTUSEifanyscratches,dentsornicksaredetected,
contactDyniscoimmediatelyforinstructions.
b Installationofadamagedassemblymayresultinprematureruptureofthedisk.
Installation:
1 Insertthenewassemblyintothepre‐tappedopeninginthereceivingequipment.
2 Startthreadingbyhandtoensurethethreadsarematchedandingoodcondition.DONOTFORCE
THETHREADS.Continuethreadingtheassemblybyhanduntilfullyseated.
3 Tightenasrequiredtopreventleakagewiththeappropriatetool(wrench,screwdriver,spanner,
etc.)DONOTOVERTIGHTENasthiscandamagesealingsurfacesandthreads.
4 Forassemblieshavingtaperedpipethreads;useTeflontapeorothersuitablepipethreadsealants
asrequiredifcompatiblewiththeprocessmedium.
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