Flowserve M-series PolyChem - Manual (Page 48)

USER INSTRUCTIONS PolyChem M-SERIES ENGLISH 71569218 07-11
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Page 48 of 60
®
an oil based carrier. They are supplied in a paste
form which is brushed onto the male pipe threads.
Flowserve recommends using one of these paste
sealants.
Full thread length engagement is required for all
fasteners.
Refer to Figure 6-4 for recommended bolt
torques.
6.9.1
Power end assembly – Long Coupled
6.9.1.1
Bearing installation
Mounting of bearings on shafts must be done in a
clean environment. Bearing and power end life can
be drastically reduced if even very small foreign
particles work their way into the bearings. Wear clean
gloves.
Bearings should be removed from their protective
packaging only immediately before assembly to limit
exposure to possible contamination. After removing
the packaging they should only come in contact with
clean hands, fixtures, tools and work surfaces.
The chart shown in Figure 6-40 gives the part numbers
for bearings in Flowserve PolyChem pumps. Note that
the term “inboard bearing” refers to the bearing nearest to
the casing. “Outboard bearing” refers to the bearing
nearest to the motor.
Both bearings have a slight interference
fit which requires that they be pressed on the shaft with
an arbor or hydraulic press. Even force should be
applied to only the inner race. Never press on the outer
race, as the force will damage the balls and races.
An alternate method of installing bearings is to heat
the bearings to 93 °C (200 °F) by means of an oven
or induction heater. With this approach the bearing
must be quickly positioned on the shaft.
Never heat the bearings above 110°C (230°F). To do
so will likely cause the bearing fits to permanently
change, leading to early failure.
Figure 6-40: Flowserve PolyChem M-series anti-
friction bearings
Pump
Group
Type of bearing
Inboard and outboard
single row, deep groove
A & 1
Oil bath / mist –
Open 1
6307-C3
Greased for life –
double shielded 2
6307-2ZC3
B & 2
Oil bath / mist –
Open 1
6310-C3
Greased for life –
double shielded 2
6310-2ZC3
Notes:
1) These bearings are open on both sides. They are lubricated by
oil bath or oil mist.
2) These bearings are shielded on both sides. They come pre-
greased by the bearing manufacturer. The user does not need to
regrease these bearings. The shields do not actually contact the
bearing race, so no heat is generated.
3) All bearing configurations are supplied only with steel cages
a)
Install the inboard bearing [3011.1] on the shaft
[2100.2] until it is positioned against the shoulder.
b) Allow the inboard bearing to cool before installing
the outboard bearing.
c) Install the outboard bearing [3011.2] on the shaft
[2100.2] until it is positioned against the shoulder.
d) Allow the outboard bearing to cool and then check
bearings for ease of rotation.
6.9.1.2
Power end seals
Lip seals
If lip seals were used install new lip seals in the bearing
cover [3260] and the housing [3200]. The lip seals
[4310.1 and 4310.2] are double lip style, the cavity
between these two lips should be
1
/
2
to
2
/
3
filled with
grease. When installing this part, the large
metal face on the lip seal must face away from the
bearings.
Labyrinth seals
The following are general installation instructions
regarding the VBXX Inpro seal. Follow the
instructions provided with the seal by the
manufacturer.
The elastomer O-ring located on the OD of the seal
has been sized to overfill the groove in which it is
located. When installing the seal into its
corresponding housing, in addition to compressing the
O-ring a certain amount of material may shear off.
This sheared material should be removed. An arbor
press should be used to install the seal.
Install the inboard seal in the bore of the bearing
housing with the single expulsion port positioned at
the 6 o’clock position.