KRAL CGF, Руководство по эксплуатации

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5 Function description
5.6 Overflow valve (optional)
Radial shaft seal standard/high-temperature Depending on the material used, radial shaft
seals can be used for temperatures of up to
150 °C (standard) or 90 °C (high pressure) re-
spectively.
The used radial shaft seal rings
1 have one a lip
each used to seal against liquid outlet and air in-
let.
1
2
1 Radial shaft seal ring
2 Ball bearing
5.5.2 Seal variants outer bearing
Mechanical seal standard/hard material The lubrication of the mechanical seal 1 inevit-
ably results in a low leak, that as a rule evapor-
ates. However, at low-volatile liquids such as
heavy fuel oil the leak becomes visible. The in-
tegrated leakage vent holes
2 allow draining of
this leakage. The drainage through these holes
has to be kept free. Dry running must be avoided
at all costs, as the seal will overheat and be des-
troyed in a matter of seconds.
1
3
2
2
1 Mechanical seal
2 Leakage vent hole
3 Ball bearing
Mechanical seal with quench If low-volatile liquids or liquids that tend to
harden when coming into contact with the atmo-
sphere are used, a mechanical seal
1 can also
be used in combination with a radial shaft seal
ring
3 . This allows the sealing chamber to be
connected via the leakage vent holes 2 with a
quench tank so that the side of the mechanical
seal facing away from the liquid will always be
kept under the exclusion of air.
1
4
2
2
3
1 Mechanical seal
2 Leakage vent hole for quench tank
connection
3 Radial shaft seal ring
4 Ball bearing
5.6 Overflow valve (optional)
Overflow valve
Ä
Accessories, Page 52.
5.7 Heating system (optional)
Heating
Ä
Accessories, Page 52.
14 OIC 18en-GB Edition 2020-01 Operating instructions