Maintenance
Flush Flush
Flush
Inlet Inlet
Inlet
Strainer Strainer
Strainer
Screen Screen
Screen
Theinletstrainerslteroutparticlesthatcan
plugthepumpinletcheckvalves.Inspectthe
screensdailyaspartofthestartuproutine,and
cleanasrequired.
Isocyanatecancrystallizefrommoisture
contaminationorfromfreezing.Ifthechemicals
usedarecleanandproperstorage,transfer,and
operatingproceduresarefollowed,thereshould
beminimalcontaminationoftheA-sidescreen.
CleantheA-sidescreenonlyduringdaily
startup.Thisminimizesmoisturecontamination
byimmediatelyushingoutanyisocyanate
residueatthestartofdispensingoperations.
1.FollowthePressureReliefProcedure,page
30.
2.If If
If
using using
using
electric electric
electric
transfer transfer
transfer
pumps: pumps:
pumps:
Turnoffthe
mainpower(MP).
If If
If
using using
using
pneumatic pneumatic
pneumatic
transfer transfer
transfer
pumps: pumps:
pumps:
Turnoff
thetransferpumps.Seeyourpumpmanual,
RelatedManuals,page3.
3.ClosetheFluidInletValve(XA)atthepump
inlet.Thispreventsmaterialfrombeing
pumpedwhilecleaningthescreen.
4.Placeacontainerunderthestrainerbaseto
catchdrainoffwhenremovingthestrainer
drainplug(ZB).
5.Aftertheuidhasdrained,removethe
cap(ZC)andscreen(ZA)fromthestrainer
manifold.Thoroughlyushthescreenwith
compatiblesolventandshakeitdry.Inspect
thescreen.Nomorethan25%ofthemesh
shouldberestricted.Ifmorethan25%ofthe
meshisblocked,replacethescreen.Inspect
theo-ring.Greaseandreplacetheo-ring
asrequired.
6.Installthestrainerplug(ZB)withthescreen
(ZA).
7.OpentheFluidInletValve(XA),ensurethat
therearenoleaks,andwipetheequipment
clean.Cleanandgreasethethreads.
Proceedwithoperation.
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