Flowserve LNGT - Manual (Page 14)

LNGT USER INSTRUCTIONS ENGLISH 00083107 02-08
Page 14 of 48
®
Identify the actual pump size and serial number
from the pump nameplate. Check that this
agrees with the applicable certification provided.
3.3 Design of major parts
Pump casing [1213 + 1214]
The pump has its main casing gasket axial to the
shaft allowing maintenance to the rotating
element by removing the upper half casing
[1213]. Suction and discharge branches are in
the bottom half [1214] and therefore remain
undisturbed.
Impeller [2200]
The double suction impeller is fully shrouded and
may be fitted with optional hub rings.
The impeller can be executed with staggered
vanes to minimize vibration.
Shaft [2100]
The large diameter stiff shaft, mounted on
bearings, has a keyed drive end.
Pump bearings and lubrication
Ball bearings (journal and thrust) are fitted as
standard and may be either oil or grease
lubricated, protected by V-ring (Labyrinth ring)
seals.
Bearing isolators or stationary labyrinths may be
fitted as an option in the bearing covers to protect
the bearings.
Bearing housing [3200]
Two grease nipples enable grease lubricated
bearings to be replenished between major
service intervals. For oil lubricated bearings, a
constant level oiler is fitted.
Stuffing box [4110]
The stuffing box housing is designed for gland
packing rings. Mechanical seal is an option
Shaft seal [4010]
The mechanical seal[s] attached to the pump
shaft seals the pumped liquid from the
environment.
Gland packing may be fitted as an option.
Driver
The driver is normally an electric motor. Different
drive configurations may be fitted such as internal
combustion engines, turbines, hydraulic motors etc
driving via couplings, belts, gearboxes, drive shafts
etc.
Accessories
Accessories may be fitted when specified by the
customer.
3.4 Performance and operating limits
This product has been selected to meet the
specifications of your purchase order. See section
1.5.
The following data is included as additional
information to help with your installation. It is typical,
and factors such as temperature, materials, and seal
type may influence this data. If required, a definitive
statement for your particular application can be
obtained from Flowserve.
3.4.1 Operating limits
Pumped liquid temperature limits*
- 20 to + 145 ºC*
[- 4 to + 176 ºF]
Maximum ambient temperature*
- 20 to + 40 ºC
[- 4 to +104 ºF]
Maximum soft solids in
suspension*
up to 3 % by volume
[refer for size limits]
Maximum pump speed refer to the nameplate
* Subject to written agreement from Flowserve.