Property
class
M4 M5 M6 M8 M10 M12 M16 M20 M24 M30
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.
Twice a year
Major overhaul To secure a long operating lifetime
for the product. It includes
replacement of key components
and the measures taken during an
inspection.
Every year, under normal operating
conditions
NOTICE:
Shorter intervals may be required when the operating conditions are extreme, for example
with very abrasive or corrosive applications or when the liquid temperatures exceed 40°C
(104°F).
Inspection
Regular inspection and service of the pump ensures more reliable operation.
Service item Action
Visible parts on
the pump and
installation
1. Check that all screws, bolts, and nuts are properly tightened.
2. Check the condition of lifting handles, eye bolts, ropes, chains, and wires.
3. Check for worn or damaged parts.
4. Adjust and/or replace if necessary.
Pipes, valves,
and other
peripheral
equipment
1. Check for worn or damaged parts.
2. Adjust and/or replace if necessary.
Pump casing and
impeller
1. Check for worn or damaged parts.
2. Adjust and/or replace if necessary.
Maintenance
Flygt 2125 Installation, Operation, and Maintenance Manual 27
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