Test & measurement


electricity into the low voltage grid.” Initially, it was difficult to precisely control the expander performance. The globe control valve originally used reacted too slowly to changing process requirements and could not reliably provide the gaseous medium with the desired output pressure. “We spent a lot of time looking for a solution to optimise our system in this respect. Ultimately, we made contact with Marcel Mokosch from Technical Sales at Schubert & Salzer. He visited us immediately to discuss the topic and proposed a solution with the sliding gate valve, which not only met our expectations, but even exceeded them”, says Igelbüscher.


SIGNIFICANT IMPROVEMENT THROUGH THE USE OF THE SLIDING GATE VALVE


The reason for the excellent control performance Instrumentation Monthly January 2026


is the fundamental design principle of Schubert & Salzer’s sliding gate valve, which is based on two sealing discs that slide over each other (see info box). As a result, the maximum stroke between open and closed is a mere 6-9 mm and only very low actuation forces are required. This makes control extremely precise and agile. “The control accuracy has improved considerably through the use of the sliding gate valve. We can now control the output pressure with absolute precision”, says Aslan.


A further advantage: The use of the sliding gate valve allowed two other valves to be replaced. For reasons of safety, it must be possible to stop the supply of steam or gas within a maximum of two seconds. For that reason a quick-closing valve was previously installed upstream of the control valve. However, sliding gate valves close within


“ Reliability and low maintenance costs play a decisive role in the cost- effective operation of a system like Energify. That’s why we rely on a simple design and a robust construction...”


Continued on page 38... 37


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