Flowserve LN - Manual (Page 11)

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09
Page 11 of 32 flowserve.com
3 PUMP DESCRIPTION
3.1 Design of major parts
3.1.1 General
This pump has the casing joint axial to the shaft
allowing maintenance to the rotating element by
removing the top half casing.
3.1.2 Pump casing
The axially split casing has branches in the lower half
enabling access to rotating element by removing top
half casing.
3.1.3 Impeller
A shrouded impeller with hub rings is fitted.
3.1.4 Shaft
The large diameter stiff shaft, mounted on bearings,
has a keyed drive end.
3.1.5 Bearing housing
Two grease nipples enable grease lubricated
bearings to be replenished between major service
intervals. For oil lubricated bearings, a constant level
oiler is fitted.
3.1.6 Pump bearings and lubrication
The bearings may be oil or grease lubricated.
3.1.7 Seal housing
The design enables one of a number of sealing
options to be fitted.
3.1.8 Shaft seal
The mechanical seal(s), attached to the drive shaft,
seals the pumped liquid from the environment. (Gland
packing may be fitted as an option.)
3.1.9 Driver
The driver is normally an electric motor. Different
drive configurations may be fitted such as an internal
combustion engine, turbines, hydraulic motors etc
driving via couplings, belts, gearboxes, drive shafts
etc.
3.1.10 Accessories
Accessories may be fitted when specified by the
customer.
3.2 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 + 80 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.
4 INSTALLATION
Equipment operated in hazardous locations
must comply with the relevant explosion protection
regulations. See section 1.6.4, Products used in
potentially explosive atmospheres.
All equipment must be grounded.
4.1 Location
The pump should be located to allow room for
access, ventilation, maintenance and inspection with
ample headroom for lifting and should be as close as
practicable to the supply of liquid to be pumped.
Refer to the general arrangement drawing for the
pump set.
4.2 Foundation
There are many methods of installing
pump units to their foundations. The correct method
depends on the size of the pump unit, its location and
noise vibration limitations. Non-compliance with the
provision of correct foundation and installation may
lead to failure of the pump and, as such, would be
outside the terms of the warranty.
Ensure the following are met:
a) The baseplate should be mounted onto a firm
foundation, either an appropriate thickness of
quality concrete or sturdy steel framework. (It
should NOT be distorted or pulled down onto the
surface of the foundation, but should be
supported to maintain the original alignment.)