Festo Introduces the VAEM Valve Controller for Multi-Head Liquid Dispensing

April 1, 2020

Festo’s new compact VAEM solenoid valve controller for multi-head micro-dispensing in pharmaceutical manufacturing and laboratory applications provides individualized control and calibration of up to eight solenoid valves. The compact, lightweight and energy-efficient VAEM is ideal for applications requiring high speed and a low coefficient of variation (CV).

“As our life science technologists were designing the next generation of Festo multi-head micro-dispensing systems, they found that a more advanced valve controller was required, one that would meet their speed and precision goals,” said Craig Correia, Director of Life Science & Process Industries, Festo North America. “As development on the new valve controller progressed, the team also designed in energy efficiency, minimal heat generation, ease of use, compactness, and importantly, the capability to compensate for flow variations in individual valves.”

PB-31-Festo-SpringFlowers-400.jpg

The VAEM can open a valve in under 2 milliseconds. Rapid and precise control of the valve decreased CV from 3% to less than 0.5% in laboratory benchmark testing. Users can quickly and easily calibrate the flow through individual channels, which improves precision across multi-head systems.

The VAEM employs a “hit and hold” strategy to lower energy consumption. A short burst of high current “hits” the open position, and then the valve controller switches to a minimum current to “hold” the open position for a specified time. The strategy of using current rather than voltage to control valves diminishes heat buildup and aids in maintaining specified flow.

VAEM valve controllers are suitable for 2/2- and 3/2-way solenoid valves. They feature RS232 communication. Future iterations will have options for Ethernet, Modbus TCP, and IO-Link. A PC based graphical user interface (GUI) enables users to pre-calibrate the dispense heads and to save the control parameters for standalone operation. External 24 V trigger-input synchronizes the VAEM with other systems. The controller’s dimensions are 3.6 x 3.9 x 1.1 inches (92 x 100 x 28 mm).

For more information, visit www.festo.com.

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