Flowserve QLQ Vertical Worthington - Manual (Page 33)

QLQ, QLQC USER INSTRUCTIONS ENGLISH 87900027 – 06/14
Page 33 of 61
5.2.2.1.1 Pre-lubrication of oil lubricated pumps
As a general rule, the oil must be allowed to flow by
gravity at least 45 minutes before the pump is started
for the first time or in case the pump was turned off
for a longer duration. Adequate care should be taken
to make sure that the flow is available and is
consistent for subsequent startups.
5.2.2.1.2 Enclosed shaft lubricants
The following oils are recommended for enclosed
lineshaft bearing lubrication under normal operating
conditions. See following tables.
Oil used for enclosed shaft lubrication should only be
of high quality turbine grade. The viscosity of the oil
at working temperature must be at least 30 cSt
(mm
2
/sec).
The pour point of the oil must be in accordance with
the lowest expected temperature of the bearing
housing during a stop of the pump.
It is recommended that detergent type
oils not be used.
Non-food grade lubricant oils
Oil Manufacturer Trade name of the oil
Conoco Inc. Conoco Diamond Class Turbine
oil ISO -32
Exxon Company Teresstic- GT 32
Mobil Oil Company Mobile DTE-797- Grade-32
Shell Oil Company Tellus-32, Tellus-37 or Turbo Oil
T -32
Chevron Lubricants Chevron Turbine Oil TR-32
BP Energol HL-C 32
Texaco, Inc. Texaco Regal (R&O)- 32
Food grade lubricant oils
Oil Manufacturer Trade name of the oil
Exxon Company Exxon-DTE-FM32
Mobil Oil Company Mobile DTE-FM- Grade-32
Shell Oil Company Cassida HF 32
If none of the above oils are available, equivalent
turbine oil (food or non-food grades as required) with
the matching properties has to be selected. Oils with a
viscosity range of 30 cSt (mm
2 /sec) to 37 cSt
(mm 2 /sec) at 40
C (100 F) with a minimum viscosity
index of 90 are recommended.
5.2.2.1.3 Oil level
The correct oil level is in the middle of the oil sight
glass and shall be checked when the pump is not in
operation. Periodically check if the lubricating oil is
mixed with any condensed water. Careful opening of
the oil drain during a stop of the pump will show any
water.
After the initial start the level will decrease
due to circulation of the oil through the bearings.
If the oil level is higher than specified, it could
result in higher bearing temperatures resulting in poor
lubrication.
5.2.2.2 Injection lubricated pumps
Enclosed lineshaft bearings are lubricated by
extraneous liquid (usually clean water), which is fed
to the tension nut either by gravity flow, or by a
pressure injection system.
Injection systems are designed for each
installation. Injection pressure and quantity of liquid
will vary. Normally 0.45-0.90 m
3
/h (2-4 USgpm) at
0.7-1.4 bar (10-20 psi) over maximum pump
discharge pressure of clean liquid is required.
5.2.2.2.1 Pre-lubrication of injection lubricated pumps
As a general rule, the liquid flow is to be started at
least 15~20 minutes before the pump is started for
the first time or in the event of pump not being in use
for longer duration.
The injected lubricant flow is never stopped for short’
off’ periods. Adequate care should be taken to make
sure that the flow is available and consistent
It is recommended that detergent type
oils not be used.