Graco 3A2494D CheckFluid Fluid, FluidViscosity Viscosity, AbrasiveMaterials Materials, forAbrasive Abrasive, Guidelinesfor for, Guidelines Guidelines, UsingEquipment Equipment, BeforeUsing Using, FlushBefore Before, Flush Flush, CheckFluid Fluid, FluidResistivity Resistivity, Resistivity, Viscosity, Equipment, Materials

GunSetup
Check Check
CheckFluid Fluid FluidResistivity Resistivity Resistivity
Toreducetheriskofre,explosion,orelectric
shock,checktheuidresistivityinanon-hazardous
areaonly.ResistanceMeter722886andProbe
722860arenotapprovedforuseinahazardous
area.
Failuretofollowthiswarningcouldcausere,
explosion,orelectricshockandresultinserious
injuryandpropertydamage.
GracoPartNo.722886ResistanceMeterand
722860Probeareavailableasaccessoriestocheck
thattheresistivityoftheuidbeingsprayedmeets
therequirementsofanelectrostaticairspraysystem.
Followtheinstructionsincludedwiththemeterand
probe.Readingsof25megohms-cmandabove
providethebestelectrostaticresults.
Ahighconductivitykitorhighconductivityhosemay
berequiredforreadingslessthan25megohm-cm.
Table Table
Table4 4 4. . .Fluid Fluid FluidResistivity Resistivity ResistivityLevels Levels Levels
Megohms Megohms
Megohms- - -cm cm cm
1–77–2525–200200–2000
HighCon-
ductivity
Kitrecom-
mended
HighCon-
ductivity
Kitmaybe
needed
Bestelec-
trostatic
results
Goodelec-
trostatic
results
Check Check
CheckFluid Fluid FluidViscosity Viscosity Viscosity
Tocheckuidviscosityyouwillneed:
•aviscositycup
•astopwatch.
1.Completelysubmergetheviscositycupin
theuid.Liftthecupoutquickly,startingthe
stopwatchassoonasthecupiscompletely
removed.
2.Watchthestreamofuidcomingfromthebottom
ofthecup.Assoonasthereisabreakinthe
stream,shutoffthestopwatch.
3.Recordtheuidtype,elapsedtime,andsizeof
theviscositycup.
4.Iftheviscosityistoohighortoolow,contactthe
materialsupplier.Adjustasnecessary.
Flush Flush
FlushBefore Before BeforeUsing Using UsingEquipment Equipment Equipment
Theequipmentwastestedinuidatthefactory.To
avoidcontaminatingyouruid,ushtheequipment
withacompatiblesolventbeforeusingtheequipment.
Guidelines Guidelines
Guidelinesfor for forAbrasive Abrasive AbrasiveMaterials Materials Materials
Whensprayingabrasivematerials,followthese
guidelines:
•OrderPartNo.24N704Electrode(blue)for
abrasivematerials.
•Sizethenozzleproperlytoreduceuidpressure
below30psi(0.21MPa,2.1bar),producingan
8–12in.(200–300mm)uidstream.
•Operatethegunwiththeuidadjustmentknobin
thefullowpositionatalltimes.Useanexternal
uidregulator,nottheuidadjustmentknob,toset
theuidpressure.
•Usetheminimumatomizingandfanairpressures
possibletoachieveagoodpattern.
•Followallproceduresunder
CleantheGunDaily,page29.
•Inspecttheelectrodedailyandreplaceifdamaged.
SeeElectrodeReplacement,page39.
26 3A2494D