Flowserve Mark 3 Sealed Metallic Durco - Manual (Page 56)

MARK 3 USER INSTRUCTIONS ENGLISH 71569102 01-13
Page 56 of 72 flowserve.com
Figure 6.29 Flowserve Mark 3 bearings
Group Type of bearing
Inboard single row,
deep groove
5
Outboard double row, angular
contact, deep groove
5 & 9
Optional outboard
duplex angular contact
5
1 Oil bath/mist - open 1 6207-C3 5306-AC3 or 3306-AC3 7306-BECBY
Regreasable - single shielded 2 6207-ZC3 5306-AZC3 or 3306-AZC3 NA 6
Greased for life - double shielded 3 6207-2ZC3 5306-A2ZC3 or 3306-A2ZC3 NA 7
Sealed for life - double sealed 4 6207-2RS1C3 5306-A2RSC3 or 3306-A2RS1C3 NA 7
2 Oil bath/mist - open 1 6310-C3 5310-AC3 (AHC3) or 3310-AC3 7310-BECBY
Regreasable – single shielded 2 6310-ZC3 5310-AZC3 or 3310-AZC3 NA 6
Greased for life - double shielded 3 6310-2ZC3 5310-A2ZC3 or 3310-A2ZC3 NA 7
Sealed for life - double sealed 4 6310-2RS1C3 5310-A2RSC3 or 3310-A2RS1C3 NA 7
3 Oil bath/mist - open 1 6314-C3 5314-AC3 or 3314-AC3 7314-BECBY
Regreasable - single shielded 2 6314-ZC3 5314-AZC3 or 3314-AZC3 NA 6
Greased for life - double shielded 3 6314-2ZC3 5314-A2ZC3 or 3314-A2ZC3 NA 7
Sealed for life - double sealed 4 6314-2RS1C3 5314-A2RSC3 or 3314-A2RS1C3 NA 7
3- HD Oil bath/mist - open 1 NUP217ECP C13 NA 7 7315-BECBY
Regreasable - single shielded 2 NA 7 NA 7 NA 7
Greased for life - double shielded 3 NA 7 NA 7 NA 7
Sealed for life - double sealed 4 NA 7 NA 7 NA 7
Notes:
1.
These bearings are open on both sides. They are lubricated by oil
bath or oil mist.
2. These bearings are pre-greased by Flowserve. Replacement
bearings will generally not be pre-greased, so grease must be applied
by the user. They have a single shield, which is located on the side
next to the grease buffer, or reservoir. The bearings draw grease
from the reservoir as it is needed. The shield protects the bearing
from getting too much grease, which would generate heat. The
grease reservoir is initially filled with grease by Flowserve.
Lubrication fittings are provided, to allow the customer to periodically
replenish the grease, as recommended by the bearing and/or grease
manufacturer.
3. 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.
4. These bearings are sealed on both sides. They come pre-greased by
the bearing manufacturer. The user does not need to regrease these
bearings. The seals physically contact and rub against the bearing
race, which generates heat. These bearings are not recommended at
speeds above 1750 r/min.
5. The codes shown are SKF codes. Inboard and outboard bearings
have the C3, greater than “normal” clearance. These clearances are
recommended by SKF to maximize bearing life.
6. Regreasable - single shielded bearings are not available in the duplex
configuration; however, open oil bath-type bearings can be used for
the regreasable configuration. These bearings must be pre-greased
during assembly. Lubrication fittings are provided, to allow the user to
periodically replenish the grease, as recommended by the bearing
and/or grease manufacturer.
7. Not available.
8. All bearing configurations are supplied only with steel cages
9. SKF - the 5300 and 3300 bearing series are identical and therefore
can be used interchangeably.
10. Group 3-HD: Duplex angular contact bearings standard in outboard
position.
Figure 6.30 Bearing position - Mark 3 design
Mark 3 standard shaft Mark 3 duplex bearing shaft
Group A Group A
1 68 mm (2 11 /
16
in.) 1 61 mm (2 3 /
8
in.)
2 139 mm (5 15 /
32
in.) 2 129 mm (5 3 /
32
in.)
3 NA 3 *
3-HD NA 3-HD *
* Inboard bearing located against shoulder.
If the power end is equipped with single shielded
regreasable bearings, see figures 5.7 and 5.8 for
proper orientation of the shields
The orientation of the bearing shields is
different for horizontal pumps (figure 5.7) and In-Line
pumps (figure 5.8).
b) Install the outboard bearing retaining device onto
the shaft.
Double row bearings
Place the snap ring [2530] onto the outboard end
of the shaft and slide down to the inboard bearing.
The proper orientation of the snap ring
must be assured in this step. The flat side of the
snap ring must face away from the inboard
bearing.
Duplex angular contact bearings
Place the bearing retainer [2530.1] onto the
outboard end of the shaft and slide down to the
inboard bearing.
The proper orientation of the bearing
retainer must be assured in this step. The small
side of the retainer must face away from the
inboard bearing.
c) Install the outboard bearing.
Double row bearings
Install the outboard bearing [3013] firmly against
the shoulder as shown in figure 6.29. If hot
bearing mounting techniques are used, steps