14
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factory. If necessary, the rate of delivery can be adjusted by potentiometers P1 and P2 in
the range, that is specified in the chapter ”Technical Data“. If a different mode of
operation is required, refer to section „setting mode of operation“.
Safety in case of a ruptured pump tube
When using
electrical conductive process fluid
, a damage of the pump tube is detected
by electrodes. If the level of the escaping process fluid in the pump housing reaches the
electrodes, the pump is switched off and an failure signal is activated. If
a process fluid
with very low electrical conductivity
is metered and the rupture of a tube occurs inside
the pump housing, the escaping process fluid can be drained with the help of an
additional tube that is connected to a tube fitting in the center of the tube retainer.
Maintenance / Wearing parts / Spare parts
The pump tube is a wearing part and has to be exchanged on a regular basis. The
maintenance of the chemical feed system is limited to the exchange of this tube, which
can be done during normal service.
NOTICE!
Before installing the EASYDOS Perestaltic V the chemical compatibility of the tube
and the process fluid has to be evaluated.
The life span of the pump tube depends on its chemical compatibility and the actual
periods of operation.
Spare tube: 138-0.8x1.6 *PharMed
®
, system back pressure max. 2 bar; 7-400 ml/h
Part number: 37041
Chemical compatibility of the PharMed
®
-pump tube with the following process fluids:
Aluminum chloride 53%
very good
Aluminum sulfate 50%
very good
Ferrous chloride 43%
very good
Ferrous sulfate 5%
very good
Sodium hydroxide 40%
very good
Sodium hypochloride 12%
very good
Hypochloric acid 10%
very good
Hypochloric acid 37%
good
Sulfuric acid 30%
very good
Sulfuric acid 96%
unsuitable
Hydrogen peroxide 30%
very good
Hydrogen peroxide 90 %
good
For other media please ask the pump manufacturer for the chemical resistance.
Spare parts are available that can be ordered in case of mechanical failure. When
ordering spare parts please specify the type of the unit and the serial number.
Spare parts
Tube retainer 0.8x4x1
part no. 37040
Rotor with rolls
part no. 37042
*PharMed
®
is a registered trade mark of Saint-Gobain Performance Plastics.
NOTICE!