Flowserve Worthington WXB User Manual download pdf (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.

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Flowserve Worthington WXB User Manual Page 42

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