13
A.0500.601 – Atex IM -TG G/H/MAG/SRT/08.00 EN (01/2021)
1.10.2 List of residual risks for TG MAG
Potential ignition source
Measures applied to prevent the source
becoming effective
Ignition
protection used
Normal
operation
Expected
malfunction
Rare
malfunction
Exposed to
hot surfaces
of pump
casing
and jackets
Customer has to ensure that the
temperature of the pump and heating liquid
do not exceed the allowable lImits.
EN ISO 80079-36
§6.2
Additionally, the operator has to ensure
the operating limits for speed, flow and
pressure are not exceeded.
User Instructions (IM)
Exposed to
hot surfaces
at the outside
surface of the
can (i.e. inside
the bearing
backet)
Customer has to ensure that the pump is
properly filled to ensure good circulation
over the internals of the mag-drive (i.e.
forced circulation by means of the built-in
auxiliary pump). The temperature of the can
must be monitored.
EN ISO 80079-36
§6.2
User Instructions
Excessive heat
accumulation
Customer has to ensure a minimum flow
through the pump.
EN ISO 80079-36
§6.2
User Instructions
Exposed to
hot surface
temperature
of bearing
bracket
Bearing bracket must be freely exposed
to the atmosphere to allow cooling of the
surfaces. Operator must regularly check
temperature and good operation of external
bearing.
EN ISO 80079-36
§6.2
EN ISO 80079-37
§5.6 & §5.7
User Instructions
Internal high
temperatures
and/or sparks
Dry running and self-priming is excluded
from normal operation.
EN ISO 80079-37
§5.6 & §5.7
Operator has to ensure to run the pump
and magnetic coupling chamber
completely filled with the pumped liquid
during start, normal operation and shut-off.
User Instructions
Mechanical sparks
by rubbing contact
of rotating shaft
with stationary
pump and bracket
components
In the event of failure of the bracket ball
bearings, a safety device made of brass
(an incendive material) is provided to avoid
sparkings at the inside of the bracket.
Pump may not run dry. Excessive wear
of shaft bearings and internals must be
prevented by adequate maintenance
procedures.
EN ISO 80079-37
§5.6 & §5.7
User Instructions
Electro-static
discharges
Customer should provide earth
connections or equipotential bridges in
case of indirect risks
EN ISO 80079-36
User Instructions
Remarks:
• For category 2, the risks at “normal operation” and those at “expected malfunction” have
to be controlled.
• For category 3, the risks at “normal operation” have to be controlled.
