7 Servicing/Maintenance
43 of 76
CTN / CTN-H
Size Bearing size Oil quantity
11)
[l]
125/150 2 x 7315 BUA DIN 628 1.2
200/250 2 x 7318 BUA DIN 628 2.1
7.2.4 Radial bearings
In the volute casing and the pipe assemblies the shaft is guided in plain bearings
lubricated by the fluid handled.
If the fluid handled is contaminated, the bearings can be lubricated by an external
liquid supplied via a lubrication line (special design).
Table25: External lubrication
Sizes Bearings lubricated by
Fluid Grease
Quantity per
bearing
Pressure for
external
lubrication
Quantity per
bearing
Max.
permissible
speed for
grease
lubrication
25/40/50 1.0 l/min 1.5 bar above
tank pressure
4 g/h 1750 rpm
80/100 1.5 l/min 1450 rpm
125/150 1.5 l/min 1450 rpm
200/250 2.5 l/min 960 rpm
7.3 Drainage/cleaning
WARNING
Fluids handled, consumables and supplies which are hot and/or pose a health
hazard
Hazard to persons and the environment!
▷ Collect and properly dispose of flushing fluid and any fluid residues.
▷ Wear safety clothing and a protective mask if required.
▷ Observe all legal regulations on the disposal of fluids posing a health hazard.
If the pump set has handled fluids whose residues could lead to corrosion damage in
the presence of atmospheric humidity or could ignite upon contact with oxygen, the
pump set must be neutralised, and anhydrous inert gas must be blown through the
pump to ensure drying.
7.4 Dismantling the pump set
7.4.1 General information/Safety regulations
WARNING
Unqualified personnel performing work on the pump (set)
Risk of injury!
▷ Always have repair work and maintenance work performed by specially trained,
qualified personnel.
11) Including constant-level oiler
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