Xylem Flygt 2860.180, Installation, Operation And Maintenance Manual

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During the reassembly, always make sure that existing index markings are in line.
The reassembled drive unit must always be insulation-tested and the reassembled pump
must always be test-run before normal operation.
Torque values
All screws and nuts must be lubricated to achieve correct tightening torque. Screws that
are screwed into stainless steel must have the threads coated with suitable lubricants to
prevent seizing.
If there is a question regarding the tightening torques, please contact the local sales and
service representative.
Screws and nuts
Table 1: Stainless steel, A2 and A4, torque Nm (ft-lbs)
Property
class
M4 M5 M6 M8 M10 M12 M16 M20 M24 M30
50 1.0 (0.74) 2.0 (1.5) 3.0 (2.2) 8.0 (5.9) 15 (11) 27 (20) 65 (48) 127 (93.7) 220 (162) 434 (320)
70, 80 2.7 (2) 5.4 (4) 9.0 (6.6) 22 (16) 44 (32) 76 (56) 187 (138) 364 (268) 629 (464) 1240 (915)
100 4.1 (3) 8.1 (6) 14 (10) 34 (25) 66 (49) 115 (84.8) 248 (183) 481 (355) — —
Table 2: Steel, torque Nm (ft-lbs)
Property
class
M4 M5 M6 M8 M10 M12 M16 M20 M24 M30
8.8 2.9 (2.1) 5.7 (4.2) 9.8 (7.2) 24 (18) 47 (35) 81(60) 194 (143) 385 (285) 665 (490) 1310
(966.2)
10.9 4.0 (2.9) 8.1 (6) 14 (10) 33 (24) 65 (48) 114 (84) 277 (204) 541 (399) 935 (689) 1840
(1357)
12.9 4.9 (3.6) 9.7 (7.2) 17 (13) 40 (30) 79 (58) 136 (100) 333 (245) 649 (480) 1120
(825.1)
2210
(1630)
Hexagon screws with countersunk heads
For hexagon socket head screws with countersunk head, maximum torque for all property
classes must be 80% of the values for property class 8.8 above.
Service
Regular inspection and service of the pump ensures more reliable operation.
Type of service Purpose Inspection interval
Inspection To prevent operational interruptions and machine
breakdown. Measures to secure performance and pump
efficiency are defined and decided for each individual
application. It can include such things as impeller
trimming, wear part control and replacement, control of
zinc-anodes and control of the stator.
2,000 hours or 1 year, whichever comes
first. Applies to normal applications and
operating conditions at media (liquid)
temperatures < 40°C (104°F).
Major
overhaul
To secure a long operating lifetime for the product. It
includes replacement of key components and the
measures taken during an inspection.
4,000 hours or 2 years, whichever comes
first. These intervals apply to normal
applications and operating conditions at
media (liquid) temperatures < 40°C
(104°F).
Maintenance
Flygt 2860.180 Installation, Operation, and Maintenance Manual 23