General Description; Applications; Improper Operating Method - Grundfos DME Serie Instrucciones De Instalación Y Funcionamiento

3. General description

The Grundfos DME dosing pump is a self-priming
diaphragm pump.
The pump consists of:
• a cabinet incorporating the drive unit and
electronics,
• a dosing head with back plate, diaphragm,
valves, connections and vent valve,
• a control panel incorporating display and
buttons. The control panel is fitted either to the
front or to the side of the cabinet.
The motor is controlled in such a way that the dosing
gets as even and constant as possible, irrespective
of the capacity range in which the pump is operating.
This is carried out as follows:
The speed of the suction stroke is kept constant and
the stroke relatively short, irrespective of the
capacity. Contrary to conventional pumps, which
generate the dosing stroke as a short pulse, the
duration of the dosing stroke will be as long as
possible. Thus, an even dosing without peak values
is ensured. As the pump is always dosing at full
stroke length, it ensures the same high accuracy and
suction capability, irrespective of the capacity, which
is infinitely variable in the ratio of 1:800.
The pump features an LCD display and a user-
friendly control panel which gives access to the
pump functions.

3.1 Applications

The pump is suitable for liquid, non-abrasive, non-
flammable and non-combustible media strictly in
accordance with the instructions in these installation
and operating instructions.
Areas of application (among others)
• drinking water treatment
• wastewater treatment
• cooling water treatment
• washing systems
• process water treatment
• chemical industry.

3.2 Improper operating method

The operational safety of the pump is only
guaranteed if it is used in accordance with section
3.1 Applications.
Warning
Other applications or the operation of
pumps in ambient and operating
conditions, which are not approved,
are considered improper and are not
permitted. Grundfos cannot be held
liable for any damage resulting from
incorrect use.
Warning
The pump must be equipped with a
diaphragm leakage detection when
used for crystallizing media.
Warning
The pump is NOT approved for
operation in potentially explosive
areas!
Warning
A sunscreen is required for outdoor
installation!
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