Series SCK, Size 25-25-100
Page 14
9220-003-en
Revision 14
TM 10272
Edition 01/2021
6
Commissioning/Shutdown
6.1 Initial commissioning
Normally, the pumps have already been test-run with
water. Unless special agreements have been made,
there could still be residual amounts of water in the
pump. This must be noted in view of a possible reac-
tion with the medium.
Long life grease lubrication
The ball bearings are greased for life. Regreasing
is not possible and not necessary.
For service lives, see
Section 7.2
.
Oil bath lubrication
Pour in oil into the bearing pedestal!
For procedure and the oil grade, see
Sections 7.2
and 7.10.1
.
6.1.1 Mechanical seals
The design and material combination are specified in
the data sheet.
The proper condition of the components and
the protective facilities must be ensured to
prevent any risk from escaping medium.
The regulations and recommendations of the me-
chanical seal manufacturer must always be ob-
served.
See relevant installation and operating manual for the
mechanical seal.
6.1.2 Filling the pump housing
Check to see whether the screws of the mechanical
seal and all flange connections are tightened. When
retightening the housing screws, make sure that the
support bracket is undone. Otherwise, the pump could
be deformed.
For screw tightening torques see
Section 1.1
.
Open the suction line fully so that the medium can
flow into the pump.
Open the discharge valve so that the air in the pump
can escape.
If air cannot be vented into the discharge line, e.g. a
drop in pressure in this line is not permitted, vent-
ing must be performed upstream of the discharge
valve.
Monitor the venting operation until no air but only liq-
uid emerges.
Monitor the venting operation again until no more air
emerges.
Close the discharge valve again until only
the minimum flow rate is obtained after
the motor has been started.
6.1.3 Start-up
Check the direction of rotation of the motor with a ro-
tary field instrument.
As viewed from the motor, the direction of rotation of
the pump is clockwise. See also the direction of
ro-
tation arrow
of the pump.
If no rotary field instrument is available,
the motor can be switched on briefly with
the pump filled so that it does not run up.
Observe the direction of rotation through
the fan hood.
The pump must not run dry during the
check of the direction of rotation.
Check alignment of the coupling.
Mount coupling guard.
The pump must be completely filled with
liquid. The maximum admissible flow rate
must not be exceeded.
Switch the motor on.
Set the desired flow by opening the discharge valve.
6.2 Operating limits
The operating limits of the pump/unit in terms
of pressure, temperature, power and speed
are entered in the data sheet and it is
imperative to observe them!
6.2.1 Abrasive media
If liquids with abrasive constituents are
conveyed, increased wear at the pump is to
be expected. The inspection intervals should
be reduced compared with the usual times.
6.2.2 Min./max. flow rate
The operating range generally recommended lies at
0.3 Q
opt
to 1.1 Q
opt
. Consult the manufacturer for
operation outside this range and observe
Section
2.6.2.
