UNIREX Pump - Manual (Page 33)

MARK 3 USER INSTRUCTIONS ENGLISH 71569102 08-06
Page 33 of 68 flowserve.com
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.
5.2 Pump lubricants
5.2.1 Oil bath
Oil bath is available on all product lines with the
exception of the In-Line pump. The standard bearing
housing bearings are oil bath lubricated and are not
lubricated by Flowserve. Before operating the pump,
fill the bearing housing to the center of the oil sight
glass with the proper type oil. (See figure 5-2 for
approximate amount of oil required - do not overfill.)
On the Mark 3A design, an optional oil slinger is
available. The oil slinger is not necessary; however,
if used, it provides an advantage by allowing a larger
tolerance in acceptable oil level. Without an oil
slinger, the oil level in the bearing housing must be
maintained at ±3 mm (± 1 /
8
in.) from the center of the
sight glass. The sight glass has a 6 mm (¼ in.) hole
in the center of its reflector. The bearing housing oil
level must be within the circumference of the center
hole to ensure adequate lubrication of the bearings.
See figure 5-3 for recommended lubricants. DO NOT
USE DETERGENT OILS. The oil must be free of
water, sediment, resin, soaps, acid and fillers of any
kind. It should contain rust and oxidation inhibitors.
The proper oil viscosity is determined by the bearing
housing operating temperature as given in figure 5-4.
To add oil to the housing, clean and then remove the
vent plug [6521] at the top of the bearing housing, pour
in oil until it is visually half way up in the sight glass
[3856]. Fill the constant level oiler bottle, if used, and
return it to its position. The correct oil level is obtained
with the constant level oiler in its lowest position, which
results in the oil level being at the top of the oil inlet pipe
nipple, or half way up in the sight glass window. Oil
must be visible in the bottle at all times.
Note that on ANSI 3A™ power ends there is no
constant level oiler. As stated above, proper oil level
is the center of the “bull’s eye” sight glass [3856].
(See figure 5-1.)
Figure 5-1