Flowserve HWX Worthington - Manual (Page 14)

HWX USER INSTRUCTIONS ENGLISH - 07/14
Page 14 of 40
Fan cooling is supplied always as a standard for Oil
Cascade sump. No cooling is required for pure oil
mist application.
3.3.6 Pump bearings and lubrication
The standard bearing arrangement for all HWX
pumps is angular contact deep groove ball thrust
bearings arranged back to back and a deep groove
ball radial bearing able to ensure long life under the
most severe operating conditions.
Thrust Bearings are brass cage design and line
bearing is metal cage design in accordance with
normal oil industry preferences and API 610
requirement. Bearing manufacturers must be FPD
approved suppliers.
Lubrication of the bearings is provided by oil cascade
or pure oil mist.
3.3.7 Shaft seal
The mechanical seal is a cartridge type design for
single, tandem, and double seals to control the
leakage of liquid to the environment. The cartridge
design provides for proper axial alignment of the seal
faces and minimises the contamination of sensitive
seal faces during installation.
Lubrication of the mechanical seal is provided by the
pumped liquid or by an auxiliary seal-flush system. A
vent connection is provided to eliminate the possibility
of the seal becoming vapour bound.
3.3.8 Driver
The driver is normally an electric motor mounted on a
support head and coupled to the pump by a flexible
spacer coupling.
3.3.9 Coupling/Coupling guards
Flexible spacer couplings are provided in various
makes and models to suit customer preference.
(Aluminium non- hinged guards are provided)
3.3.10 Mounting Plate and Motor Support Head
HWX pumps are supplied with a mounting plate as a
standard, already suitable for levelling screws
installation.
Extended dimension mounting plates are available on
request for applications where coolers or seal pots
are required and need to be contained within the
mounting plate.
The motor support head is a heavy duty, register-fit
motor mount with generous openings allowing easy
accessibility for field maintenance. The open
compartments allow easy access to all bolting and
removal of the entire rotor with the bearing housing
from either side.
3.3.11 Accessories
Accessories may be fitted when specified by the
customer.
3.4 Performance and operating limits
In the interest of operator safety
the unit must not be operated above the nameplate
conditions. Such operation could result in unit failure
causing injury to operating personnel. Consult
instruction book for correct operation and
maintenance of the pump and its supporting
components.
4.0 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.
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 Part Assemblies
The pumps are delivered completely mounted and
prealigned with the motor. Also the shaft seal is in the
correct position. Final alignment after complete
installation is necessary. If drivers and/or seal systems
are delivered separately, follow the assembly
procedure in section 6.8.
4.3 Foundation
The foundation shall be located on a place that allows
a minimum of pipe work and that is easily accessible
for inspection during operation. According to the
environment the foundation may consist of concrete
or of steel. It must be rigid and heavy enough to
absorb normal vibrations and shocks.
4.3.1 Horizontal alignment of the baseplate
Horizontal alignment is done with levelling screws.
Use a spirit level for correct horizontal alignment of
the baseplate.
The max. misalignment is 0.5 mm/m
baseplate length.