Flowserve L Worthington Simpson - Manual (Page 25)

L and U USER INSTRUCTIONS ENGLISH 85392721 07-12
Page 25 of 36 flowserve.com
For 2 years operation:
1 x 3011 - set of bearings (line and thrust)
2 x 4130 - sets of gland packing
2 x 2450 - shaft sleeves
2 x 4590 - sets of gaskets and seals
2 x 4134 - lantern rings
2 x 1500 - casing wear rings
(optional: 2 x 4200 - mechanical seals
2 x 1500 - impeller wear rings)
For 4 years operation:
1 x 3011 - set of bearings (line and thrust)
2 x 4130 - sets of gland packing
2 x 2450 - shaft sleeves
2 x 4590 - sets of gaskets and seals
2 x 4134 - lantern rings
2 x 1500 - casing wear rings
1 x 2200 - impeller
(optional: 2 x 4200 - mechanical seals
2 x 1500 - impeller wear rings)
6.5 Tools required
A typical range of tools that will be required to
maintain these pumps is listed below.
Readily available in standard tool kits, and dependent
on pump size:
•
Open ended spanners (wrenches) to suit up to
M 24 (
7 /
8
in.) screws/nuts
•
Socket spanners (wrenches), up to M 24 (
7
/
8
in.)
screws
•
Allen keys, up to 6 mm (¼ in.) A/F
•
Range of screwdrivers
•
Soft mallet
More specialized equipment:
•
Bearing pullers
•
Bearing induction heater
•
Dial test indicator
•
C-spanner (wrench) - for removing shaft nut.
(If this is difficult to source, consult Flowserve.)
See also section 6.8.1.k.
6.6 Fastener torques
Screw/bolt size
Torque Nm (lbf·ft)
Pump feet
fasteners
All other
fasteners
M8 ( 5 /
16
in.)
M10 ( ⅜ in.)
M12 (½ in.)
M16 (
⅝ in.)
M20 (¾ in.)
M24 (
⅞ in.)
-
-
63 (46)
170 (125)
340 (250)
590 (435)
10 (7)
20 (15)
34 (25
84 (62)
165 (120)
285 (210)
Non-metallic gaskets incur creep
relaxation – before commissioning the pump, check
and retighten fasteners to tightening torques stated.
6.7 Renewal clearances
As wear takes place between the impeller and casing
wear ring the overall efficiency of the pump set will
decrease. To maintain optimum efficiency it is
recommended that rings are replaced and the
impeller renovated when the radial clearance detailed
in section 3.4.2 has doubled to 0.2 to 0.6 mm (0.008
to 0.024 in.), depending on pump size and type. On
the vertical design it is recommended that the product
lubricated bearing is renewed at a diametrical
clearance of 0.5 mm (0.02 in.).
6.8 Disassembly
Refer to section 1.6, Safety, before dismantling
the pump.
Before dismantling the pump for
overhaul, ensure genuine Flowserve replacement
parts are available.
Refer to sectional drawings for part numbers and
identification.. See section 8, Parts lists and
drawings.
6.8.1
L and U
a) Isolate motor and lock off electrical supply in
accordance with local regulations.
b) Isolate suction and discharge valves.
c) Remove coupling guards and disconnect the
coupling halves.
d) Drain pump casing [1213] Remove any auxiliary
piping if applicable.
e) Remove the pump half coupling.
f)
Unbolt the glands/seal covers [4120] from the casing.
(If glands are split type, remove completely.)
g) With a suitable punch, drive out the two straight
roll pins which are used on the horizontal split
flange to align the upper and lower half casings
[1214 and 1213].
h) Remove the screws, which hold the upper and
lower half of the casing together, and remove the
upper half. Tapped holes are provided in the joint
flange to enable the use of forcing bolts to loosen
the joint.
i) Lift the casing upper half [1214] using the cast on
lifting lugs where provided. Where there are no
integral lifting lugs, remove the pipe plug [6569.1]
or fittings, if used, from the volute vent connection
located on top of the casing upper half and install
a special steel lifting eye with a threaded shank to