Flowserve Worthington WXB User Manual download pdf (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.

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Flowserve Worthington WXB User Manual Page 34

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