Multitec
- The tolerances stipulated for mounting the unit on the
foundation, for shims and alignment have been met.
- The pipeline have been connected without warping the pump
nozzles.
- Electrical connection and relay setting correspond to the motor
rating and comply with the applicable regulations.
- The unit has been equipped with all hydraulic, electrical and
mechanical protection devices.
- The pump has been fully primed with the medium to be
handled.
- The unit’s direction of rotation corresponds to the rotation
arrows.
- All connections are tight.
For installation without foundation (e.g. on spring
elements) care has to be taken that all movements
of the pump unit can be compensated, e.g. by installation of
expansion joints in the discharge and suction lines.
6.1.1 Lubricating agent
Grease lubricated bearings
The grease lubricated bearings are packed with grease at the
factory.
Oil lubricated bearings
Into the bearing cover fill oil of the quality HD 20 (ISO VG 46)
(see point 7.2.2).
6.1.2 Priming the Pump and Checks to Be Carried
out
Before each start-up, the pump and suction line must be
completely vented and primed with the liquid to be pumped. The
pump has several plugged holes for venting; adequate venting
devices can be used in the pipelines. The shutoff element in the
suction or feed line must be fully open.
Fully open all auxiliary connections provided and check the
throughflow.
Open shut-off valve “C” in the vacuum balance line (if applicable),
close vacuum-tight shut-off valve “E” (see 5.4.1).
Dry running will lead to increased wear on the unit
and possibly to damage on the pump !
If the discharge line is equipped with an automatic check valve,
open the minimum flow valve and secure against inadvertent
closing.
Exceptions :
- If the check valve is not subjected to backpressure prior to
pump start-up, the check valve must be closed first.
- On pumps fitted with a mechanical seal, the mechanical seal
will leak only slightly or invisibly (vapour) during operation. It
is maintenance-free.
- If the pump is equipped with a gland packing, leakage during
operation is normal (see section 6.1.6).
Special notes regarding cooled mechanical seals
(Sealing Code 64)
- If the pump is equipped with a cooled mechanical seal, vent
the seal chamber by opening the screwed plug 903.11 by a
quarter turn, then retighten.
Sizes 32 to 100
Sizes 125 and 150
Fig. 6.1-1
Fig. 6.1-2
The seal chamber has to be vented when the pump
is in cold condition before start-up. When venting
in hot condition, the steam will exit at the screwed plug during
the venting process and there is the risk of scalding ! Should it
not be possible to avoid the open of the seal chamber in hot
condition due to the situation in the plant, a pipe with valve (not
included in KSB’s scope of supply) has to be installed at the
venting hole, in order to lead the exiting steam during venting to
another place where there is no danger of scalding. It should be
made certain that this valve cannot be opened during operation.
6.1.3 Contact Guard
In compliance with accident prevention regulations the
pump must not be operated without a coupling guard.
If the customer specifically requests not to include a
coupling guard in our delivery, then the operator must supply
one.
6.1.4 Connection to Power supply
If the pump is equipped with an electric motor, connection to the
power supply must be effected by a trained electrician only.
Check available mains voltage against the data on the motor
rating plate and select appropriate start-up method.
Make sure that in the case of three-phase motors with star-delta
starting method switching over from star to delta will be effected
at very short intervals. Prolonged switch-over intervals may result
in pump damage.
8
To Next Page
Loading...
