Almatec E 08 - Page 17

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Malfunction PossibleReason Solutions/Remarks
pumpsoperates,howeversuction
capacityinsufficient
pumpoperatestoofast
operationbeyondphysicallimits
cavitation
operationbeyondpumpcapacity

aircushionwithinsuction/discharge
line
drysuctionagainstdischargepressure
valvefilterwithinsuctionlineclosed
valvefilterwithindischargelineclosed
containerwithliquidempty
vacuuminsidethecontainer
wearofthecheckvalves
suctionlineleaky
suctionlineblocked
airpressurecushionatdischarge
checkvalveblocked
startmoreslowly
adjustinstallation
check,cooldown
adjustinstallationresp.installbigger
pump
bleedtheline

wetpump,startwithoutpressure
openvalve/cleanfilter
openvalve/cleanfilter
fill/newcontainer
bleedcontainer
replacevalves
sealsuctionline
cleansuctionline
bleeddischargeline
clean/replacevalve
insufficientsuctioncapacityafter
pumprepair
connectionstightenincompletely
checkvalvesinsertedfalsely
tighten/sealconnections
correctpositioningofcheckvalves
diaphragmoverstrained pressurewithintheplant/system


inadmissiblevacuum
icing
ensurethatpressureisonlydeveloped
bythepumpitself,checkplant/valves,
replacediaphragms
checksuctionline,openvalve
improveairprocessing
leakingbetweenhousingparts housingboltsloosened
O‐ringssleevedamaged
diaphragmsattackedchemically
diaphragmsoverstrained
tensioninstallation/pipework
tightenbolts,checkpump
replaceO‐rings
replacediaphragms
replacediaphragms
loosen,eliminatetension,
useofacompensator
mufflergrey drivingairtoohumid,icing improvequalityofdrivingair
mufflerblack soiled,oilyair improvequalityofdrivingair,
installsensitivefilterinsuctionline
pumpisconnectedtoairbutdoesnot
operate
aircontrolsystemblocked
bulkparticles/dirt

chemicalinfluence(O‐ringsswollen)
valveclosedindischargeline
clean/replaceaircontrolsystem
cleanpump,replacenecessaryparts,
improveairquality
check,replacedamagedparts
openvalve
liquidleavesthepumpviathemuffler diaphragmrupture replacediaphragms,
cleanpump