Several gas mixer type comfort in the production site

Novelty: Gas mixer for Novec

878 494 Alexander Hanf

LT GASETECHNIK has successfully commissioned the first LT gas mixer for fluoronitrile (Novec) with nitrogen, technical air or CO2 at the customer’s site. This gas mixture serves as an environmentally friendly alternative to sulfur hexafluoride (SF6) as a dielectric insulating gas in medium and high voltage technology, especially in gas-insulated switchgear (GIS). SF6 is considered a climate-damaging gas that damages the atmosphere – Novec, on the other hand, is considered “green gas” – this makes the replacement attractive. We are not aware of any other gas mixers for this application, so we are pleased about a successful new development together with the operator.

The innovative gas mixture is used for the discontinuous filling of vacuum-sealed containers. For this purpose, the LT GASETECHNIK gas mixer is equipped with a pressure retaining valve at the gas mixer outlet, so the gas mixer is protected against the vacuum of the containers to be filled. Automated shut-off valves provide further protection.

A particular challenge was the use of specially calibrated mass flow controllers. With these, the mixing ratio is electronically adjustable to produce a reproducible gas mixture in any ratio (within the design limits). The fully automated gas mixer operates in a heat chamber, the associated control system from LT GASETECHNIK is installed in a separate room.

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