Operating instructions B-Series
Version 2.4, En Page 71 of 81 21-10-2005
Extra point(s) for attention with ATEX pumps.
M1.
M2.
M3.
M4.
M5.
M6.
M7.
M8.
M9.
K6a.
K6c.
K6d.
K11.
K12.
S1.
S2.
S3.
S4.
S5a.
S5b.
S6.
S7.
S8.
S9.
S10.
Make sure that rotor nut is tightened at the correct Nm.
Make sure that setting between rotor, wear plate and intermediate housing is
correct.
Make sure that packing is enclosed in the correct way.
Make sure that nuts and bolts are assembled at the correct Nm.
Use new packing when servicing.
Check the resistance list to ensure that assembled elastomers are suitable for the
pumped medium.
Assemble the pump parts according to instructions.
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 a correct mechanical shaft seal choice for the liquid to be pumped.
• Correct lubricant
• Control (by temperature monitoring)
• Maintenance
• The ignition temp. of coolant must be at least 5
0 K above the max. surface temp.
of the pump (EN 13463-5:2003 §4.5).
•
Provide a seal with extra guarantee against leakage when pumping volatile liquid.
Use the correct packing.
• Take account of pressures in the pump.
• Take account of the interaction of packing with the medium to be pumped.
Ensure the correct choice of retaining ring.
Retaining rings may contain no light-metals.
The following materials are allowed:
• Elastomers, etc.
• PTFE
• Graphite
• Ceramics
Choose the correct electric motor (only with units).
Choose the correct power and number of revolutions, etc. The motor may not be
too oversized. The motor must cut out when the pump requests more power as a
result of a broken bearing, rotor malfunction, etc.
EX-motor, cat. 2
Choose the correct bearing (according to EN 13463-5:2003, 6.1):
Regularly check the packing for leaks.
Ensure a good lubrication schedule (only with oil-lubricated bearings).
Regularly check for bearing play.
Ensure a good service plan.
Check oil level (according to (EN 13463-5:2003 §6.2) (only with oil-lubricated
bearings).
Check coolant level (according to EN 13463-5:2003 §5.4).
Check for bearing leaks.
If a leak occurs to the mechanical shaft seal: stop the pump.
Regularly check the coupling and elastomers of the coupling.
Ensure the correct spare parts.
• also ensure correct fitting, e.g. shaft and bush.
Check alignment, damage to protective cover.
Regularly check the safety devices.
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