Stübbe MV 310 Series, Operating Manual

Page: 12 / 22

Maintenance
7 Maintenance
WARNING
Risk of injury and poisoning due to hazardous media liq-
uids!
Use personal protective equipment when carrying out any
work on the
fi tting.
7.1 Servicing
1. Visual and function check (every three months):
– Normal operating conditions unchanged
– No leaks
– No unusual operating noises or vibrations
2. Ensure that fi tting functions properly (opening, closing).
3. Clean the fi tting with a moist cloth if necessary.
4. Retighten housing screws ( → Table 8 Tightening torque of
fl ange connection, Page 16).
5. Check diaphragm for wear and replace if necessary:
Diaphragm material
Max. number of
operations
1)
EPDM 150,000
FPM 100,000
PTFE (EPDM) 100,000
Tab. 4 Diaphragm maintenance interval
1) Applies to water at 20 °C. For different conditions
(chemicals, media that contains solids/abrasives),
shorten the maintenance intervals.
7.2 Maintenance
DANGER
Risk of electrocution!
All electrical work must be carried out by quali fi ed electri-
cians only.
WARNING
Risk of injury and poisoning due to hazardous or hot
media!
Use personal protective equipment when carrying out any
work on the
fi tting.
Safely collect the media and dispose of it in accordance
with environmental regulations.
WARNING
Risk of injury during disassembly!
Wear protective gloves, components can be very sharp-
edged due to wear or damage.
Remove components with springs (e.g. pneumatic drive)
carefully, since spring tension can cause components to
be ejected.
7.2.1 Removing fi tting
1. Ensure that:
– System is empty
– System has been fl ushed
– System is depressurized
– System has cooled down
– System is secured against being switched back on
again
2. Remove fi tting from the pipe.
3. Decontaminate fi tting if required.
– Dead space in the fi tting may still contain medium.
12 MV 310 BA-2017.10.26 EN 300 719