2. Dynisco
  3. BP420 Series

Dynisco BP420 Series User manual

  • Hello! I've reviewed the Dynisco BP420 Burst Plugs Installation Instructions. This document outlines important guidelines for proper installation, ensuring reliable pressure relief and system safety. The instructions cover everything from initial inspection to final tightening and feature information about temperature sensitivity and proper venting. I'm ready to answer your questions about the installation process and its requirements based on the document.
  • What should I do before installing the rupture disk?
    Who is responsible for proper venting and installation?
    What can cause a premature failure of the rupture disk?
    What should I do if the receiving equipment has imperfection?
From lab to production
providing a window into the process
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DyniscoBP420BurstPlugs
Reliable,SecurePressure‐ReliefSystem
InstallationInstructions

From lab to production
providing a window into the process
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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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