Grundfos DMH 25X Installatie- En Bedieningsinstructies pagina 10

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Beschikbare talen

* Dosing capacity per dosing head; double the capacity for double-head pumps.

** Maximum counterpressure

The pump can be operated in the range between 10

% and 100 % of the maximum dosing capacity.

3.3.2 Accuracy

Dosing flow fluctuation: smaller than ± 1.5 % within the control

range 10-100 %

Linearity deviation: ± 2 % of the full-scale value.

water as dosing medium

fully deaerated dosing head

standard pump version.

3.3.3 Maximum inlet pressure

3.3.4 Minimum counterpressure at the discharge valve of the

A positive pressure difference of at least 2 bar is

required between the suction valve and the

discharge valve in order for the dosing pump to

operate correctly.

If the total counter-pressure (at the dosing point) and

geodetic height difference between the suction valve

and the dosing point is less than 2 bar (20 m WC), a

pressure-loading valve must be installed immediately

before the dosing point.

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