Flowserve Mark 3 Sealed Metallic Durco - Manual (Page 35)

MARK 3 USER INSTRUCTIONS ENGLISH 71569102 01-13
Page 35 of 72 flowserve.com
4.8.2 Close Coupled Pumps
Alignment between the pump shaft and motor shaft is
built in by precise machining of the parts that position
these shafts. Parallel alignment of 0.18 mm (0.007
in.) and angular alignment of 0.002 mm/mm (0.002
in./in.) can be expected. If a more refined alignment
is desired, it can be accomplished with the “C-Plus”
optional alignment feature.
The C-Plus option requires that a spacer as shown in
section 8.9 be installed. Four adjusting screws are
used to push on the motor mounting studs to achieve
parallel alignment. The motor mounting fasteners
must be snug, but not tight during alignment. It may
be necessary to check the motor alignment with
motor fasteners tight. Corrections may be made until
the desired alignment is achieved. The motor
fasteners, adjusters and jam nuts should be tight.
4.8.3 In-Line pumps
The final field alignment follows the same procedure
as the initial alignment as described in section 4.5.2.
Maximum pump reliability is obtained by having near
perfect alignment. Flowserve generally recommends
no more than 0.05 mm (0.002 in.) parallel, and 0.0005
mm/mm (0.0005 in./in.) angular misalignment.
However, the Mark 3 In-Line, with its integral motor
adapter, is designed to maintain alignment despite
nozzle loads and thermal expansion. Therefore, the
Mark 3 In-Line does not require a more precise
alignment than the coupling manufacturer
recommends, and misalignment in excess of that
stated above may be acceptable depending on the
coupling used. See the coupling manufacturer’s
instructions for details.
4.9 Protection systems
The following protection systems are
recommended particularly if the pump is installed in a
potentially explosive area or is handling a hazardous
liquid. If in doubt consult Flowserve.
If there is any possibility of the system allowing the
pump to run against a closed valve or below
minimum continuous safe flow a protection device
should be installed to ensure the temperature of the
liquid does not rise to an unsafe level.
If there are any circumstances in which the system
can allow the pump to run dry, or start up empty, a
power monitor should be fitted to stop the pump or
prevent it from being started. This is particularly
relevant if the pump is handling a flammable liquid.
If leakage of product from the pump or its associated
sealing system can cause a hazard it is
recommended that an appropriate leakage detection
system is installed.
To prevent excessive surface temperatures at
bearings it is recommended that temperature or
vibration monitoring is carried out.
5 COMMISSIONING, STARTUP,
OPERATION AND SHUTDOWN
These operations must be carried
out by fully qualified personnel.
5.1 Pre-commissioning procedure
5.1.1 Pre start-up checks
Prior to starting the pump it is essential that the
following checks be made. These checks are all
described in detail in the Maintenance section of this
manual.
•
Pump and motor properly secured to the
baseplate
•
Remove the temporary motor supports installed
for shipping close coupled pumps
•
All fasteners tightened to the correct torque
•
Coupling guard in place and not rubbing
•
Rotation check, see section 5.4.
This is absolutely essential
•
Impeller clearance setting
•
Shaft seal properly installed
•
Seal support system operational
•
Bearing lubrication
•
Bearing housing cooling system operational
•
Support leg cooling for centerline mounting option
operational
•
Heating/cooling for jacketed casing/cover
operational
•
Pump instrumentation is operational
•
Pump is primed
•
Rotation of shaft by hand
•
As a final step in preparation for operation, it is
important to rotate the shaft by hand to be certain that
all rotating parts move freely, and that there are no
foreign objects in the pump casing.