Flowserve FRBH - Manual (Page 38)

FRBH, FRBHX AND FRBHS USER INSTRUCTIONS ENGLISH 71569178 10-04
Page 38 of 54
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f) Assemble the line bearing cover [35] over the shaft
and squarely into the bearing frame bore. Fasten to
the bearing frame with capscrews, washers and hex
nuts. Tighten firmly, but not excessively.
g) Assemble the deflector [40] loosely over the shaft but
do not tighten the set screws.
h) Install the coupling key [46] and tape to the shaft.
i)
Rotate the shaft and check that runout does not
exceed 0.002 inch [0.050 mm).
6.10.5 Stuffing box
6.10.5.1 All
a) Install the gland studs [209] using Loctite grade A or
equivalent. Install the square head plugs [211 in the
stuffing box as required using pipe sealant.
b) The gland studs [209] on water cooled stuffing boxes
must be sealed with pipe sealant. If only two gland
studs are used, the remaining two tapped holes must
be plugged with set screws or short capscrews. To
ensure proper sealing, the chamber can be tested to
a design pressure of 75psi.
c) Press the stuffing box bushing [63] into the stuffing
box [11], ensuring that it seats squarely on the
shoulder.
d) Lubricate the shaft [6] at the impeller position, check
the fit of the impeller key [32] in the shaft keyway
and. install the impeller [2] onto the shaft to ensure
that there is a good sliding fit. Remove the impeller
[2] and the impeller key [32].
e) Install the o-ring [30] into the impeller nut [24] using
grease or anti-seize compound to hold it in place
during assembly.
f) Install the shaft sleeve [14] onto the shaft [6] and
orientate the sleeve such that the keyways are
aligned. Install the impeller key [32] in the shaft.
6.10.5.2 Standard packing
a) Assemble the stuffing box head [11] over the shaft
sleeve [14] and orientate the lantern ring connections
to auxiliary piping (Refer to Figure 6). These
connections are normally placed on the vertical
centerline for proper venting and draining as well as
providing optimum gland stud access.
b) Push the stuffing box head [11] back against the
bearing frame flange face. Back off the thrust
bearing housing jacket screws and tighten the thrust
bearing hold down screws to slide the rotor assembly
forward such that the end face of the sleeve [14]
protrudes beyond the box face.
c) Install the shaft gasket [38] onto the shaft, ensuring
that the outside diameter is no larger than the
sleeve.
6.10.5.3 Optional expeller seal-frame 1, 2 & 3
a) Assemble the stuffing box [11] over the sleeve [14]
and into the bearing frame [19] register. Orient the
grease fitting to suit the installation. Note that if the
optional solid gland with lip seal design is used, it
must be installed first.
b) Assemble the o-ring [89] into the groove of the
stuffing box [11].
c) Adjust the shaft [6] forward to ensure that the
expeller [250] when installed will not bind against the
stuffing box head [11].
d) Assemble the gasket [73C] on to the shaft against
the shaft sleeve [14]. A small amount of grease may
be used to hold the gasket while other parts are
assembled.
e) Install the expeller [250] onto the shaft sleeve [14]
vales first.
6.10.5.4 Optional expeller seal-frame 4
a) Assemble the stuffing box [11] over the sleeve [14]
and into the bearing frame [19] register. Orient the
grease fitting to suit the installation. Note that if the
optional solid gland with lip seal design is used, it
must be installed first.
b) Assemble the o-ring [89] into the groove of the
stuffing box [11].
c) Adjust the shaft [6] forward to ensure that the
expeller [250] when installed will not bind against the
stuffing box head [11].
d) Assemble the o-ring [89D] in the bore of the expeller
[250].
e) Install the drive key [32] on the shaft [6].
f) Install the expeller [250] onto the shaft sleeve [14]
vanes first.
g) Install the 0-ring [89C] in the groove of the expeller
hub face.
6.10.6 Impeller Installation
a) Adjust the rotor assembly such that the expeller
[250] is recessed within the stuffing box cavity.
Assemble the expeller housing [251] onto the stuffing
box [11].
b) Install impeller [2].
c) Apply a small quantity of Loctite 242 or equivalent to
the exposed thread on the end of the shaft, and
thread the impeller nut [24] complete with o-ring [30]
onto the shaft.
For units with mechanical seals, do not
apply thread locking compound until seal axial
setting has been established.
d) Tighten the impeller nut [24] in accordance with
Table 6.6. This is an essential step to properly seat
the sleeve [14] and compress the gasket [38] to
provide a seal and to prevent loosening of the
impeller on the shaft.
e) Release the thrust bearing housing hold down bolts
and tighten the jacking screws to pull the impeller
back to the stuffing box head [11]. The stuffing box
head must not be rigidly clamped.