WKT
16
dangerous temperature increase at the pump surface. If
necessary, the minimum flow must be increased.
T
o
= T
f
+
= g * H / c * * (1 - )
c Specific heat [ J / kg K ]
g Acceleration due to gravity [ m / s
2
]
H Pump head [ m ]
T
f
Temperature of fluid handled [ ºC ]
T
o
Temperature of casing surface [ ºC ]
Pump efficiency at duty point [ - ]
Temperature difference [ ºC ]
6.5 Shutdown / storage / preservation
Each KSB pump leaves the factory carefully assembled.
If commissioning is to take place some time after delivery,
we recommend that the following measures be taken for
pump storage.
6.5.1 Storage of new pumps
- New pumps are supplied by our factory duly
prepared for storage. Maximum protection for up to 6
months, if the pump is properly stored indoors.
- Store the pump in a dry location.
- Rotate the shaft by hand once a month.
6.5.2 Measures to be taken for prolonged shutdown
1. The pump remains installed; periodic check of
operation
In order to make sure that the pump is always ready
for instant start-up and to prevent the formation of
deposits within the pump and the pump intake area,
start up the pump set regularly once a month or once
every 3 months for a short time (approx. 5 minutes)
during prolonged shutdown periods.
Prior to an operation check run ensure that there is
sufficient liquid available for operating the pump.
2. The pump is removed from the pipe and stored
Before putting the pump into storage, carry out all
checks specified in sections 7.1 to 7.4. Then apply
appropriate preservatives:
- Spray-coat the inside wall of the pump casing,
and in particular the impeller clearance areas,
with a preservative. Spray the preservative
through the suction and discharge nozzles. It is
advisable to close the pump nozzles (e.g. with
plastic caps or similar).
6.6 Returning to service after storage
Before returning the pump to service, carry out all checks
and maintenance work specified in sections 7.1 and 7.2.
In addition, the instructions laid down in the
sections on “ Preparations “ (6.1) and
“Operating Limits “(6.4) must be observed.
Immediately following completion of the work, all
safety-relevant and protective devices must be
re-installed and / or re-activated.
7. Servicing / maintenance
7.1 General Instructions
The operator is responsible for ensuring that all
maintenance, inspection and installation work be
performed by authorized, qualified specialist personnel
who are thoroughly familiar with the manual.
A regular maintenance schedule will help avoid expensive
repairs and contribute to trouble-free, reliable operation of
the pump with a minimum of maintenance expenditure
and work.
Work on the unit must only be carried out
with the electrical connections disconnected.
Make sure that the pump set cannot be switched on
accidentally (danger to life!).
Pumps handling liquids posing health
hazards must be decontaminated. When
draining the fluid see to it that there is no risk to
persons or environment or the environment. All
relevant laws must be adhered to (danger to life)!
7.2 Servicing / inspection
7.2.1 Supervision of operation
The pump must run quietly and free
from vibrations at all times.
The pump must never be allowed to run dry.
Always ensure a sufficient liquid level above the pump
inlet.
Prolonged operation against a closed shut-off
valve is not permitted. When operating the pump
set with the shut-off valve in the discharge line slightly
open for a short period of time, the permissible pressure
and temperature limits must not be exceeded.
A special design is required to comply with
temperature class T6 in the bearing area. In
such cases, and if ambient temperature exceeds 40ºC,
contact the manufacturer.
Verify correct oil level as described in section 6.1.4.
The shut-off elements and the auxiliary feed lines must
not be closed during operation.
Any stand-by pumps installed shall be started up
regularly, e.g. once a week, to keep them operational.
Attention shall be paid to the correct functioning of the
auxiliary connections. The cooling system must be
thoroughly cleaned at least once a year to ensure proper
cooling. Take the pump out of service for this purpose.
If the flexible coupling elements begin to
show signs of wear, they must be
replaced in due time. Re-align the coupling as described
in section 5.6.
Supervision during operation
Depending on the labor availability and pump
responsibility, we recommend the following checks, and
in case of any abnormality the maintenance responsible
should be advised immediately.
Caution
Caution
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