Repair
Flush Flush
Flush
Inlet Inlet
Inlet
Strainer Strainer
Strainer
Screen Screen
Screen
Theinletstrainerslteroutparticlesthatcanplugthe
pumpinletcheckvalves.Inspectthescreensdailyas
partofthestartuproutine,andcleanasrequired.
Isocyanatecancrystallizefrommoisture
contaminationorfromfreezing.Ifthechemicalsused
arecleanandproperstorage,transfer,andoperating
proceduresarefollowed,thereshouldbeminimal
contaminationoftheA-sidescreen.
Note
CleantheA-sidescreenonlyduring
dailystartup.Thisminimizesmoisture
contaminationbyimmediatelyushing
outanyisocyanateresidueatthestartof
dispensingoperations.
1.Closetheuidinletvalveonthey-strainerinlet
andshutofftheappropriatefeedpump.This
preventsmaterialfrombeingpumpedwhile
cleaningthescreen.
2.Placeacontainerunderthestrainerbasetocatch
drainoffwhenremovingthestrainerplug(C).
3.Removethescreen(A)fromthestrainer
manifold.Thoroughlyushthescreenwith
compatiblesolventandshakeitdry.Inspectthe
screen.Nomorethan25%ofthemeshshould
berestricted.Ifmorethan25%ofthemeshis
blocked,replacethescreen.Inspecttheo—ring
(B)andreplaceasrequired.
4.Ensurethepipeplug(D)isscrewedintothe
strainerplug(C).Installthestrainerplugwiththe
screen(A)ando—ring(B)inplaceandtighten.
Donotovertighten.Letthegasketmaketheseal.
5.Opentheuidinletvalve,ensurethatthereare
noleaks,andwipetheequipmentclean.Proceed
withoperation.
334946H 51