Millipore WP61 115 60 - Page 9

ChemicalDutyVacuum/ressureump 7
RelacingtheO-ring
1. Unscrewthefoursocket-capscrewsfromthepumpheadandunscrew
thetwoscrewsfromthepumphandle.Removethepumphead
assemblyfromthetopofthepump.
2. Removethevehillips-headscrewsthatholdthevalveplate
assemblytotheundersideofthepumpheadassembly.
3. RemovetheO-ringandreplaceitbypressingthenewO-ringintothe
groove.
4. Replacethevalveplateassemblywiththerecessedscrewholes
facingoutandtightenthevehillips-headscrews.
5. Replacethepumpheadassemblyandtightenthesockethead
screws.
Troubleshooting
Vacuumroblems
Leakage,contaminationandunusualout-gassingarethegeneralcauses
ofproblemsassociatedwithpoorvacuum.Tooperateatmaximum
efciency,asystemmustbethoroughlyclean.fthesystemis
completelycleanandfreefromleaks,andunwarrantedvacuum
problemsstillexist,thepumpshouldbechecked.Asimplecriterionfor
theconditionofthepumpisthedeterminationofitsmaximumvacuum
capability.Thiscanbeaccomplishedbyblockingtheintakeandreading
thevacuumlevelonthegauge.
ressureroblems
Leakageandcontaminationarethegeneralcausesofproblems
associatedwithpoorpressure.Tooperateatmaximumefciency,a
systemmustbethoroughlyclean.fthesystemiscompletelyclean
andfreefromleaks,andunwarrantedpressureproblemsstillexist,the
pump/compressorshouldbecheckedbyaservicetechnician.
TroubleshootingGuide
oor
uming
Speed
oor
ressure
Loud
Unit ossibleCause Corrective Action
Damagedvalves Replaceapper
valves
Debrisinvalves Removedebris
andcheckfor
valvedamage
DamagedO-rings ReplaceO-rings
Looseheadscrews Tightenhead
screws
Loosettings Tightenttings
underside
ofpump
head
assembly
valve plate
O-ring
groove
DOMINIQUE DUTSCHER SAS