ALBIN PUMP ALH - Page 56

56 albinpump@irco.com  Albinpump.com  Albin Pump ALH Instruction Manual
since 1928
ALH
Supplemental Instructions
for ATEX Certied Materials
4 - Particular dispositions when using a frequency inverter
The ALBIN peristaltic pumps have variable limits of working according to the discharge pressure,
number of rotations of the pump and temperature of the pumped product. These working limits are
mainly imposed by the heating of the hose, on which the lifespan is strongly dependent.
Within the framework of an application required to change the speed of the pump, the three
following points will have to be checked:
> Temperature of pumped product
> Number of rotations of the pump
> Discharge pressure
The maximum values of use will be xed at the determination of the pump whose copy is in the
appendix.
5 - Dry running the pumps
The ALBIN peristaltic pumps can function in the absence of liquid in the pump, without causing
heating of the pump higher than the classied of temperature T, in particular for the period of
starting-up of the pump.
In fact, dry running the pump with blocked inlets or outlets generates too high a demand on
the pump hose, and can generate high internal temperatures because of the compression and
decompression of the air locked up between the pump and the blocked opening.
This type of dysfunction is not controllable by a safety device (of sensor type) because the pump is
dry and the mechanical constraints generated on the pump are low. Starting up the pump must thus
be done after having checked that the inlet and outlet are not blocked.
Nevertheless, dry running is not a normal function of the pump and if it doesn’t directly constitute a
risk of ignition, it leads to premature wear and tear of the hose. This type of function must be limited
as much as possible.
6 - Replacement of parts
The parts should be replaced only by original ALBIN parts which correspond to the conguration of
origin of the pump. If necessary, the characteristics of the pump are modied and the ATEX
certication of the pump is not applicable any more.
With each hose replacement, the adjustment of compression of the hose must be controlled
and adapted to the instructions of adjustment registered in the handbook. The technicians who
intervene on ATEX material must be ATEX trained and approved.