Precisely mixing and dosing gases plays a decisive role in many areas, whether in life sciences, machine building or food & packaging. The proportional flow control valve VEMD is the cost-effective solution provided by Festo for a wide range of applications. Let's take a look at four examples.
The VEMD is a closed-loop, thermal mass flow controller that precisely supplies inert gases and oxygen with 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 safety. To reliably protect the bags from degenerating, they are flooded with the inert gas nitrogen when they are being filled. During 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.
Infusion bags are flooded with the inert gas nitrogen when they are being filled. (Foto: ©sudok1 – stock.adobe.com)
The VEMD can also be used for applications in the food processing industry, e.g. in compact ice cream machines. The amount of air mixed with the ice is critical for preventing ice crystals from forming.
The control of step-controlled needle valves has in some cases proven not to be consistent enough to ensure uniformly high product quality. The excellent ratio of high precision and low costs of the VEMD is impressive, since it ensures a high level of enjoyment for customers.