APV W+10/8 - 7 Service and Maintenance; Checking the Shaft Seal; Replacing the Shaft Seal

GB
Form no.: L453147GB– revision 06/2013
7. Service and maintenance
7.1 Checking the shaft seal
Checkthepump'sshaftsealforleaksonaregularbasis.Iftheshaft
sealisleaking,replaceitoritsrelevantpartsasdescribedbelow.
7.2 Replacing the shaft seal
Thesectionaldrawing(page3)showsthepositionandconstruction
oftheshaftseal(applyingbothtoordinarysealsandsealswith
liquid/steamushing).
Toreplacetheshaftsealitisnecessarytodismantlethepump.
Followthestepsdescribedbelowandrefertothesectional
drawing(page3).
1. Disconnectthepowersupplyinthemotorisolatorbyremoving
thefusesanddisconnectingthecables.
2. Turnoffthesteamandushingliquidsupply.
3. Closethepumpsuctionanddischargepointanddrainthepump
housing.Ifthepumpisusedforhotand/oraggressiveliquids,
specialprecautionsmustbetaken.Insuchcases,observethe
localregulationsforpersonalprotectionwhenworkingwiththese
products.
4. Opentheclampring(item9a)orthehousingscrewsoncetheinlet
and outlet pipes have been properly isolated.
Dismantlethepumphousing(item1a,1b)andremovetheimpeller
(item4).
5. Takethestationarysealface(item5.6)installedinthebackplate
(item7a,7b)outwithyourngers.
6. Removetheo-ring(item5.5)fromthestationarysealface.
7. Useyourngerstoremovetherotarysealface(item5.7)ttedin
theimpeller(item4).
8. Removetheo-ring(item5.5)fromtherotarysealface.
9. Cleanthechambersofthestationaryandrotarysealfacewithair
or water.
9a Therearstationarysealface(item5.6)ismountedonthepressure
ring*(item5.11).Therotarysealface(item5.7)ismountedonthe
shaft(item11).Theseareremovedinthesamewayasthefront
sealcomponents.
*TheW+50/600pumphas2identicalpressurerings.
Dismantling the pump
Dismantling the shaft seal
11
APV