Inhaltsverzeichnis
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Verfügbare Sprachen
CONTENTS
1.
1.1
1.2
2.
2.1
2.2
2.3
2.4
3.
3.1
3.2
3.3
3.4
3.5
3.6
4.
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.
6.
6.1
6.2
6.3
7.
8.
9.
10.
Before beginning installation procedures,
these installation and operating instruc-
tions should be studied carefully. The in-
stallation and operation should also be in
accordance with local regulations and ac-
cepted codes of good practice.
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1. General description
Page
The Grundfos DME dosing pump is a self-priming di-
aphragm pump.
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4
The pump consists of:
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• a cabinet incorporating the drive unit and elec-
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tronics,
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• a dosing head with back plate, diaphragm,
6
valves, connections and vent valve,
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• a control panel incorporating display and buttons.
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The control panel can be fitted either to the end or
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to the side of the cabinet.
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Being equipped with a stepper motor, this dosing
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pump is unique in its field. The stepper motor offers
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the possibility of varying the capacity by changing
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the duration of the dosing stroke.
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Furthermore, the motor is controlled in such a way
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that the dosing gets as even and constant as possi-
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ble, irrespective of the capacity range in which the
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pump is operating.
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This is carried out as follows:
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The speed of the suction stroke is kept constant and
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the stroke relatively short, irrespective of the capa-
11
city. Contrary to conventional pumps, which generate
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the dosing stroke as a short pulse, the duration of
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the dosing stroke will be as long as possible. Thus,
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an even dosing without peak values is ensured. As
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the pump is always dosing at full stroke length, it en-
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sures the same high accuracy and suction capability,
14
irrespective of the capacity, which is infinitely varia-
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ble in the ratio of 1:1000.
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The pump features an LCD display and a user-
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friendly control panel which gives access to the
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pump functions.
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1.1 Applications
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The DME dosing pump is designed for handling
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chemicals within the following ranges of applications,
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among others:
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• Drinking water treatment.
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• Wastewater treatment.
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• Swimming pool water treatment.
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• Boiler water treatment.
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• Cooling water treatment.
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• Process water treatment.
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• Washing systems.
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