Flowserve Worthington WXB - Manual (Page 42)

WXB USER INSTRUCTIONS ENGLISH - 07/14
Page 42 of 51
4) For those mechanical seals equipped with single
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].
7.8.3 Assembly of the thrust bearing side
1) Use the reverse procedure to chapter 6.7.3,
Dismantling of the thrust bearing side.
2) Put the O-ring [4610.2] on the shaft. Slide the
sleeve [2471.1] on the shaft [2100] against the
shoulder. Heat up the thrust ball bearings [3013]
and slide them on to the shaft against the sleeve
[2471.1].
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 lockwasher [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.
7.8.4 Assembly of the line bearing side
1) Use the reverse procedure to chapter 6.7.2,
Dismantling of the line bearing side.
2) Put the O-ring [4610.8] on the shaft. Slide the
sleeve [2471.2] on the shaft [2100] against the
shoulder. Heat up the inner race of the roller
bearing [3012] and push it on to the shaft against
the sleeve [2471.2].
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 [4330.3] 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 lockwasher [6541.2] and shaft nut [2910.2].
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.
7.8.5 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.