Operating instructions B-Series
Version 2.4, En Page 70 of 81 21-10-2005
11.10.9 Mechanical shaft seal
Regularly check the sealing of the mechanical shaft seal. If it leaks excessively the pump/pump unit must
be put out of use as soon as possible. The mechanical shaft seal must be replaced. Check (if applicable)
the level of the mechanical shaft seal sealing liquid.
Extra point(s) for attention with ATEX pumps.
M6.
M8.
M9.
K6d.
B5.
Check the resistance list to ensure that assembled elastomers are suitable for the
pumped medium.
Ensure the good assembly of the mechanical shaft seal as indicated by the
supplier.
Ensure the good assembly of the auxiliary system as indicated by the supplier.
Ensure the correct choice of retaining ring.
Retaining rings may contain no light-metals.
The following materials are allowed:
• Elastomers, etc.
• PTFE
• Graphite
• Ceramics
Protect pump against temperature!
• (Only with Cat. 2 pumps)
11.11 Back pull out
B-series pumps can be provided with a back-pull out system. This can be, for example, to maintain the
mechanical shaft seal and bearing of the pump. Then the bearing support with intermediate housing,
mechanical shaft seal, shaft and rotor can be disassembled from the pump housing as a whole, without the
suction and pressure lines having to be disassembled.
11.12 Spacer coupling
In combination with the back-pull out system a spacer coupling must be used. As a result it is not
necessary to disassemble the drive gear. For overall sizes and coupling choice, see technical specifications
B-Series.
11.13 Overhaul advice
If a pump has to be fully checked and/or overhauled we advise sending it back to the supplier. This is
unless there are sufficiently competent personnel and provisions available to carry out the overhaul
according to the instructions on-site. In this case we request you to specifically ask us for the assembly
and disassembly instructions. If not otherwise available these will be supplied in the original language.
If the pump is returned for an overhaul we request you to drain and rinse it before sending. Also send a
“non-opposition declaration” to meet safety and environmental protection requirements.
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