Technical data

Functions

DME

Functional description

The electronically controlled variable-speed motor of

the DME pump provides optimum control of the stroke

speed. As shown in the figure below, the duration of

each suction stroke is constant while the duration of

each discharge stroke varies according to the capacity

set, resulting in optimum discharge flow in any

operating situation.

The advantages:

• The pump always operates at full stroke length,

irrespective of the capacity set; this ensures

optimum accuracy, priming and suction.

• A capacity range of 1:800 for each pump size.

• Smooth and constant dosing ensuring an optimum

mixing ratio at the injection point.

• Significant reduction of pressure surges preventing

mechanical stress on diaphragm, hoses, pipes,

connections and other dosing parts exposed to

leakage and wear.

• The installation is less affected by long suction and

discharge lines.

• Easier dosing of highly viscous and gas-containing

liquids.

Fig. 3 Relation between stroke-frequency adjustment and capacity

TM01 8944 0900

Discharge

Suction

Discharge

Suction

100 %

Capacity setting

Duration

50 %

10 %