Flowserve PolyChem GRP - Manual (Page 43)

USER INSTRUCTIONS POLYCHEM GRP ENGLISH 71569132 12-04A
Page 43 of 52
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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 (Group 1) or adapter (Group 2 and Group 3)
with the single expulsion port positioned at the 6
o’clock position.
Install the outboard seal in the bore of the bearing
carrier. There are no orientation issues since this is a
multiport design seal.
6.10.1.2c Magnetic seals
Follow the installation instructions provided by the
manufacturer.
6.10.1.3 Bearing carrier/power end assembly
a) Install new O-rings [4610.2] onto the bearing
carrier. Slide the bearing carrier [3240] over the
outboard bearing [3013].
b) Install the outboard bearing retaining device.
Double row bearings on Group 1 and 2 pumps.
Slide the snap ring [2530.1] in place with its flat
side against the outboard bearing and snap it into
its groove in the bearing carrier.
Duplex angular contact bearings on Group 1 and
2 pumps and all bearings on Group 3 pumps.
Slide the bearing retainer [2530.2] against the
outboard bearing and install and tighten the
socket head capscrews [6570.2]. (See figure 6-2
for correct torque values.)
Never compress the snap ring
unless it is positioned around the shaft and between
the bearings. In this configuration, it is contained
therefore if it should slip off the compression tool it
is unlikely to cause serious injury.
c) The shaft, bearings, and bearing carrier
assembly (figure 6-14) can now be installed into
the bearing housing [3200]. The bearing carrier
[3240] should be lubricated with oil on the O-rings
and threads before installing the assembly into
the bearing housing. Thread the bearing carrier
into the bearing housing by turning it clockwise to
engage the threads. Thread the carrier onto the
housing until the carrier flange is approximately
3mm (
1
/
8
in.) from the housing. Install the set
screws [6570.3] loosely.
d) Reinstall any tags, plugs, site gages and oiler.
Mark 3A design. Install the following items onto
the bearing housing; oil level tag (figure 6-18)
and combination Trico oiler/site gage [3855],
vent/breather [6521] and drain plug [6569].
ANSI 3A design. Install the following items onto
the bearing housing; oil level tag (figure 6-18)
and site gage [3855], plug [6521] and magnetic
drain plug [6559].
e) On Group 2 and 3 pumps, assemble the bearing
housing adapter [1340] to the bearing housing
[3200]. Be sure to install a new O-ring [4610.3].
Mark 3A and ANSI 3A design. Thread the
capscrews [6570.6] through the adapter and into
the tapped holes in the bearing housing.
f) If the power end used lip seals, install the flinger
(deflector) [2540] onto the shaft [2100].
g) Slide the sleeve [2400] onto the shaft ensuring
that the flinger o-ring and flinger slip under the
end of the sleeve.
6.10.2 Seal and rear cover assembly
a) With an external seal slide the rotating part of the
seal over the sleeve but do not tighten the
setscrews at this time.
b) Position the seat to gland gasket [4590.2] and
seal seat into the gland [4120] and slide this
assembly over the sleeve.
c) With a cartridge seal, slide the seal over the sleeve,
but do not tighten the setscrews at this time.
d) For non-cartridge internal seals, install the stationary
seal face and its gasket or O-ring into the gland.
e) Place the cover nose gasket into the gland (or
the cover to gland gasket on Groups 3 and 4)
and slide them all over the sleeve.
f) With an internal seal, position the rotating portion
of the seal on the sleeve as shown on the seal
drawing provided, or as marked on the sleeve
during disassembly. It may be necessary to
assemble the pump to the impeller clearance
setting stage to properly locate the shaft (if the
rotor has been moved). Mark the end of the box
on the shaft and then disassemble the pump
back to this stage. This is because seal setting is
measured from the end of the box.
g) If they were removed, assemble the gland studs
[6572] into the cover [1220], replace the box
extension onto the cover and slide the gland over
the sleeve.
h) Assemble the cover onto the bearing housing
[3200] on Group 1 or support head [1340] using
bolts [6570.4] and lockwashers [6541.3] and
torque up to 20 Nm (15 lbf
•ft). (For 2K3x1.5G-10,
2K4x3G-10 and 2K6x4G-10 units use eccentric
washers and nuts instead.)