Nord Drivesystems B 1050 Series, Operating And Assembly Instructions Manual, Page: 107 / 112

7 Appendix
B 1050 en-1819 107
Definition of leakage according to DIN 3761 and its appropriate use
Term Explanation
Location of leak
Shaft sealing
ring
In IEC
adapter
Housing joint Venting
Measurable
leakage
Recognisable stream,
dripping
Repair
recommend
ed
Repair
recommend
ed
Repair
recommend
ed
Repair
recommende
d
Temporary
leakage
Temporary malfunction of
the sealing system or oil
leak due to transport *)
No fault No fault
Repair if
necessary
No fault
Apparent
leakage
Apparent leakage,
e.g. due to soiling, sealing
systems which can be re-
lubricated
No fault No fault No fault No fault
Table 23: Definition of leakage according to DIN 3761
*) Previous experience has shown that moist or wet radial shaft sealing rings stop leaking later.
Therefore, under no circumstances can replacement be recommended at this stage. The reason for
momentary moisture may be e.g. small particles under the sealing lip.
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