34
motor manufacturer).
Operating
pressure
If the operating pressure reaches a critical value, the pump unit must
be brought automatically and immediately into a safe operating
condition.
The permissible operating pressures are specified in the order-related
documents.
Differential
pressure
monitoring
Positive
displacement
pumps
Side channel
pumps
If the differential pressure reaches a critical value, the pump unit must
be brought automatically into a safe operating condition immediately.
The permissible differential pressures are listed in the order-related
documents.
Pumping
medium
temperature
Surface
temperature
Sealing/Quenc
h medium
temperature
If the pumping media temperature, the surface temperature
or the
sealing/quench medium temperature reaches a critical value, the pump
unit must be brought automatically and immediately into a safe
operating condition.
The pumping media temperature must be monitored at the outlet side
or directly behind the outlet side of the pump.
A suitable resistance thermometer must be set to the limit value of the
respective Atex temperature class.
The permissible temperature application limits are listed in the order-
related documents and in the additional ATEX operator's manual in
section 3.1.3.
If no information on the sealing/quench media temperature has been
given in the order-related documentation, the maximum sealing/quench
media
temperature must be T≤70 °C. This sealing/quench media
temperature may not be exceeded. The operating company is
responsible for compliance with the temperature.
If it cannot guarantee this, the operating company must ensure that the
temperature is not exceeded (e.g., using a sealing/quench container
with cooling coil for cooling, temperature monitoring with automatic
switch-off, ...)
