Flowserve Worthington WXB - Manual (Page 34)

WXB USER INSTRUCTIONS ENGLISH - 07/14
Page 34 of 51
springs, where a spring transmits the rotation from
the shaft to the rotating sealing-ring, it must be
considered that the spring must be wound up in the
right direction (transmitting power the spring shall
be contracted). In view from the spring-side to the
sealing-faces and the shaft is turning clockwise the
spring must be wound up counter clockwise and
vice-versa.
5) If a mechanical seal with pump ring for medium
circulation is used pay attention to the rotation of
pump and pump ring.
6) At assembling the seal end plate and distance
plate pay attention to the position of piping
connections for injection or quench (refer to shaft
seal drawing).
7) After assembly of complete mechanical seal unit
on the shaft sleeve by paying attention to the
correct axially positioning of rotating mechanical
seal unit mount the complete mechanical seal
unit on the stuffing box housing [4110] using nuts
[6581.4] and studs [6572.2].
6.9.3 Assembly of the thrust bearing side
1) Use the reverse procedure to chapter 6.7.3,
Dismantling of the thrust bearing side.
2) Heat up the thrust ball bearings [3013] and push it
on to the bearing adaptor sleeve [2471.1]. Slide
this sleeve on to the shaft [2100] against the
shoulder.
All sealing faces must be free of
damage, otherwise the lubrication oil would begin
leaking excessively.
3) Before assembling all O-rings have to be checked
or renewed. Special attention has to be drawn to
the O-rings of labyrinth ring [4330.1] and [4330.2]
at assembling into bearing cover. If one of the O-
rings is stuck here the performance of the labyrinth-
type seals will be reduced or they even will break in
operation. If seal rings are assembled for item
[4330.1] and [4330.2] pay attention to the correct
assembly.
4) The washer [2905.1] has to be fitted correctly and
fixed by the locking plate [6541.1] and shaft nut
[2910.1].
5) Fixing the bearing side special attention has to be
drawn to the cylindrical pin [6811] of stuffing box
housing [4110] which has to grip into the flange of
the bearing side.
6.9.4 Assembly of the line bearing side
1) Use the reverse procedure to chapter 6.7.2,
Dismantling of the line bearing side.
2) Heat up the inner race of the roller bearing and
push it on to the bearing adaptor sleeve [2471.2].
Slide this sleeve on to the shaft [2100] against
shoulder.
All sealing faces must be free of
damage, otherwise the lubrication oil would begin
leaking excessively.
3) Before assembling all O-rings have to be checked
or renewed. Special attention has to be drawn to
the O-rings of labyrinth ring [4330.1] and [4330.3]
at assembling into bearing cover. If one of the O-
rings is stuck here the performance of the labyrinth-
type seals will be reduced or they even will break in
operation. If seal rings are assembled for item
[4330.1] and [4330.1] pay attention to the correct
assembly.
Attention: When the seal rings are equipped with a
dust lip, the space between the sealing lip and the
dust lip has to be filled with suitable grease. This
results lower wearing and a higher tightness.
4) The washer [2905.2] has to be fitted correctly and
fixed by the locking plate [6541.2] and shaft nut
[2910.2].
5) Fixing the bearing side special attention has to be
drawn to the pin [6811] of stuffing box housing
[4110] which has to grip into the flange of the
bearing side.
6.9.5 Final assembly
1) Connect suction and discharge piping
Check alignment of flanges to avoid
distortion based on too high flange forces.
2) See section 5.1, Precommissioning procedure for
precommissioning.
7.0 API Design
It is the plant operator's responsibility to
ensure that all maintenance, inspection and assembly
work is carried out by authorized and qualified
personnel who have adequately familiarized
themselves with the subject matter by studying this
manual in detail.
(See also section 1.6.2.)
Any work on the machine must be performed when it
is at a standstill. It is imperative that the procedure
for shutting down the machine is followed, as
described in section 5.9.
On completion of work all guards and safety devices
must be re-installed and made operative again.
Before restarting the machine, the relevant
instructions listed in section 5, Commissioning, start
up, operation and shut down must be observed.
Oil and grease leaks may make the ground
slippery. Machine maintenance must always
begin and finish by cleaning the ground and the
exterior of the machine.