Flowserve Guardian Sealless Metallic - Manual (Page 30)

GUARDIAN USER INSTRUCTIONS ENGLISH 71569212 08-11
Page 30 of 68 flowserve.com
5 COMMISSIONING, STARTUP,
OPERATION AND SHUTDOWN
5.1 Pre-commission procedure
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
•
All fasteners tightened to the correct torque, see
section 6.5
•
Coupling guard in place and not rubbing
•
Rotation check, see section 5.4.
This is absolutely essential
•
Impeller clearance setting, see section 6.6
•
Bearing lubrication, see section 5.2
•
Bearing housing cooling system operational
•
Support leg cooling for centerline mounting
option operational
•
Heating/cooling for jacketed casing operational
•
Pump instrumentation is operational
•
Pump is primed
•
Rotation of shaft by hand
•
Remove temporary motor supports installed for
shipping (close-coupled pumps only)
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
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 5-1 for approximate amount of oil
required - do not overfill.)
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 5-2 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 5-3.
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].
In many pumping applications lubricating oil becomes
contaminated before it loses its lubricating qualities or
breaks down. For this reason it is recommended that
the first oil change take place after approximately 160
hours of operation, at which time, the used oil should be
examined carefully for contaminants. During the initial
operating period monitor the bearing housing operating
temperature. Record the external bearing housing
temperature. See Figure 5-4 for maximum acceptable
temperatures. The normal oil change interval is based
on temperature and is shown in Figure 5-5.
Figure 5-1: Amount of oil required
Pump Guardian G & H Series pumps
Group 1 240 ml (8.1 oz)
Group 2 545 ml (18.4 oz)