The VEMD is a closed-loop, thermal mass flow controller that precisely supplies inert gases and oxygen at flow rates from 0 to 20 ln/min. Its piezo technology delivers an industry-leading dynamic response and energy efficiency, all at an excellent price/performance ratio. Since no pulse-width modulation signal is required to control the flow rates, the VEMD is quiet during operation. Thanks to its compact installation dimensions, low weight and low energy consumption, it is ideal for use in mobile devices, as the first application example shows.
The production and filling of single and multi-chamber infusion bags requires maximum process reliability. To reliably protect the bags from degenerating, they are flooded with the inert gas nitrogen when they are being filled. Throughout this process, the flow rate must be adjustable to prevent spraying during injection. This is where the VEMD comes into play, since it reliably meets the high requirements for reproducibility.