ALBIN PUMP ALH Instruction Manual page 54

ALH
Supplemental Instructions
since 1928
for ATEX Certified Materials
1 - Pump certification levels
All ALBIN peristaltic pumps are certified with II 2G T4, II 3G T4 or II 2D T4 certification .
All ALBIN peristaltic pumps are certified with II 2G T4, II 3G T4 or II 2D T4 certification. The pumps are
machines whose surface temperatures are very dependent on the temperature of the product
that they pump. Moreover, the peristaltic pumps have "mechanical" heating due to the deformations of
the hose, depending on the discharge pressure and speed of rotation of the pump. So, the level
of protection II 2G T4, II 3G T4, II 3D T4 and II 3D T4 is obtained with the working limits determined at the
reception of the ATEX form (see adjoined form).
Pumps ALH05, ALHS05, ALH10, ALHS10, ALH20 and ALHS20 are limited to a maximum
discharge pressure of 7 .5 bar (108 .8 psi) .
Pumps ALH25 to ALH125 and AHS25 to ALHS125 are limited to a maximum discharge
pressure of 15 bar .
Going beyond the working limitations specified at the sale is regarded as an abnormal function of the
pump. This can generate surface temperatures higher than the safe maximum surface temperatures
recommended in the classification of temperature (T) for which the pump was certified. It is the
responsibility of the operator to respect these working limits.
In order to use the pump industrially with the required safety levels, safety devices have
been provided (see the chapters "Protection of the pumping part" and "Protection of the
transmission part").
2 - Protection of the pumping part
The heating of the pumping part is directly related to the functioning temperature (T) of the hose.
The lifespan of the hose, which is the heart of any peristaltic pump, is strongly dependent on the
working temperature (T) of the hose: it imposes the working limits of the ALBIN peristaltic pumps.
Consequentially, the working temperature of the hose (and thus the heating of the pump) must be
known and controlled, and it depends on the three following parameters:
> Temperature of pumped product
> Number of rotations of the pump
> Discharge pressure
54 albinpump@irco.com Albinpump.com
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Albin Pump ALH Instruction Manual
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