ENGLISH
17
is reached before pump has primed. Measure liquid temperature and
modifyalarmandstoptripssettingsaccordingly.
Theoriticallythepumpcouldprimeupto8metersbutliftingheight
will be limited to 6 meters to take suction line head losses into
account.
CheckthatthesystemavailableNPSH(NPSH
A
)isalwayshigherthan
therequiredNPSH(NPSH
R
)ofpumpwhenfluidlevel isatitslower
point.
Theoreticalprimingtimes(NominalDiaofpipe=pumpnominaldia):
Pumpsize Pumpspeed
Primingtimeinsecondsvs
suctionliftheight.[Tt]
2 3 4 5 6
S40 2900 21 47 78 135
S41 2900 27 57 93 153
S45 2900 12 22 35 47 62
S46 2900 5 8 13 23 34
S50 2900 17 29 46 83
S51 2900 19 34 55 87 155
S60 2900 19 29 42 56 77
S61 2900 10 15 21 29 41
S63 2900 7 10 14 19 33
S65 1450 30 58 83 186
S68 2900 9 14 19 26 38
S80(‐2) 2900 36 49 62 74 95
S80 2900 21 53 95 132
S83 2900 14 20 26 31 39
S85 1450 32 63 100 152
S88 2900 4 7 11 18 26
S88(210) 2900 5 8 11 15 20
S100 2900 19 30 38 45 54
S105 1450 38 69 110 167
S105 2300 9 13 17 21 25
S105T114 1450 30 62 110 189
S108 2900 10 14 18 22 27
S120 1450 10 18 31 50 95
S150 1450 33 71 117 176
S160 1450 15 26 41 63 93
S170 950 28 51 85 129 181
Primingtime depends onlifting height,length of the suction line, inner
diameterofsuctionpipeandspecificgravityofthefluid.
Itwillbenecessarytoapplycorrectionfactorstoknowprimingtime:
Tt=tablewithHa=Hgxd
Ta=TtxL/Hgx(DT/DN)²
Wi
th:
Tt:theoreticalprimingtime
Ha:suctionheightwithspecificgravitycorrectionfactor
d:Specificgravityoffluid
L:totallengthofsuctionline
DT:innerdiameterofsuctionpipe
DN:pumpsuctionflangenominaldiameter
9 MAINTENANCE
9.1 GENERALINFORMATION
Only properly trained and skilled staff should undertake
maintenanceoperations.
Only authorized personnel should undertake maintenance on
ATEX certified equipments. Make sure to avoid creation of
explosionhazardwhileproceedingtomaintenanceinaATEXzone.
Alltechnicaldocumentsdeliveredwiththepumpshouldbeknown
andshouldbeavailablenearthepu
mp.
Themaintenancecrewshouldbeinformedabouttheriskslinkedtothe
useofthepump andtothepumpedfluidsbeforetheycanstartworking
on the equipment (dangerous products, fluid and pump temperature,
pressurized parts, …). They should be equipped with all appropriated
individualsafetyprotections(glasses
,gloves,…)andshouldrespectlocal
industrialandsecurityrules.
Pump contains a part of pumped fluid even when it is at a
standstill. Drain and flush pump casing with care before starting
pumpdisassembly.
Appropriateliftingdevicesshouldbeavailabletohelppersonnelmoving
heavyloads.
Themaintenance area mu
stbe clearlyidentified.Installwarningboards
withthewords«WARNING:machineunderrepair!»onthepumpand
onthecontrolcabinet.
Any work on the machine must be performed when pump is
stopped. Prior to any maintenance or repair work the motor
should be elec
trically isolated and secured against uncontrolled start.
Lockthemainswitchopen anddisconnectcircuitbreaker.Withdrawthe
fusesifany.
WARNING: electrical equipments that must bepowered on during the
maintenanceworkorpressurizedeq uipmentsmustbeclearlyidentified.
Endofmaintenanceoperations:allprotectivepartsth atwereremoved
beforemaintenanceshouldbereinstalledandallsecuritydevicesshould
bereactivated.Pumpsurroundingareashouldbecleaned.
9.2 MAINTENANCE AND PERIODIC
INSPECTIONSSCHEDULE
Itisrecommendedtobuildupamaintenanceandinspectionplan
to ensure a reliable use of pump and to reduce malfunctions
hazards.Following check points shouldbeincluded in this maintenance
plan:
Checkstateandworkingofsecuritiesandauxiliarysystems,
Checkandadjustglandpacking(ifany)forvisibleleakage,
Chec
kforanyleaksfrompumpgasketsandflangesseals,
Check lubricant level and aspect of oil (oil lubricated bearings) in
bearingbracket,
Check running time and replacement frequency of lubricants / ball
bearings,
Check the bearing bracket housing surface temperature on ball
bearingsarea,
Chec
kdirtanddustisremovedfrompumpandmotor,
Checkcouplingalignment(dependingonpumpvariant),
Check if there is unusual noises (cavitations, hissing, purring, …) or
excessivevibrations.
To Next Page