Wherever the volumetric flow rate of a medium needs to be modified quickly and over a broad adjustment range (for example: additive, colorant or aromatic material), the Lewa intellidrive product offers a good approach to a solution. That is because Lewa intellidrive unifies what was previously separate in diaphragm metering pumps: pumps with their frequency-controlled standard drives and separate adjustment drive for stroke length adjustment can now be combined in one compact and space-saving unit. This compact and space-saving unit simplifies installation and wiring effort: pre-wired connectors at the pump motor interconnect the supply and signal lines with the control module. A partial stroke mode handles the task of stroke length adjustment to adjust the volumetric flow rate. Here, the pump piston does not fully travel to front dead centre in the pressure stroke phase – the piston stops before this point as a function of the desired volumetric flow rate and travels in reverse for the suction stroke.
The innovative capability of altering the angular velocity during a revolution (i.e. within the pressure and/or suction phases too) offers variable modification of the stroke speed.
Closed-loop speed and position control with feedback of actual kinematic data (displacement-time data) for the electric drive make it possible to implement entirely new functions – giving you more potential applications.
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