With its new gas-mixing development, Witt is promising to raise quality and safety in gas supply to the highest level. The integrated solution includes high-quality, electronically controlled mixing, dosing and analyzing components that make it possible to produce exceptionally accurate gas mixtures.

The central feature of Witt's “smart” gas mixing system is an independent control system that includes automatic error correction to ensure process security. At its core is a digital controller that monitors and directs all activity. “The electronic control system optimizes the mass flow of fuel gases, compensates any disturbing influences like pressure fluctuations or temperature impacts, and keeps the values stable during the entire production period,” says Martin Bender, Witt general sales and innovation manager.

By using Mass Flow Controller (MFC) technology, very accurate mixing and dosing is ensured, Witt says. At the same time, thanks to the integrated analysis system, this controller delivers digital measurement data for permanent quality control. If the gas mixture should vary, for instance as a result of unusually strong primary pressure fluctuations, Witt's sophisticated safety concept goes into effect.

As soon as any deviation from the nominal value is detected in the analysis, the system automatically blocks the gas supply, and instantly switches over to a parallel backup supply system. There is no need to interrupt production; no faulty gas mix can get into the production.

The gas mixture is vented via a solenoid valve, the compensation tank is flushed, and the error is analyzed before mixing process continues. Everything is fully automatic. A backup supply, including premixed gas, is used as an additional safety measure.

Intuitive, touch-screen controls give users an overview of all processes and parameters. The devices can be controlled via intranet or Internet, so the data can be relayed to a customer with no need for additional software training.