Hydrogen noise, as well as wear- and maintenancefree operation. The sliding gate technology controls the flow rate in milliseconds by pushing two slotted sealing discs arranged perpendicularly to the direction of flow against each other, thus changing the flow cross section. The actuator only has to overcome the friction between the two discs resulting from the differential pressure and a short stroke from six to nine millimetres. This makes the control valve particularly fast. As a result, the actuating force required is 90 percent lower compared to other valve designs. Consequently, significantly smaller actuators may be used, and the consumption of control air or electrical actuation energy can be considerably reduced. At the same time, the short strokes protect the various pneumatic actuators and the stem seal. This enables a long service life with more than a million switching cycles. Another benefit is the savings on resources and CO 2 that has positive effects over the valve’ s entire life cycle- from manufacture and transport through to its operation in the plant. Service and maintenance costs are also reduced due to the more compact dimensions and lighter weight.
Permanent tightness prevents risk of explosion
One of the most potential dangers associated with the use of hydrogen is its extremely high flammability.
Sliding gate valve Type 8021.
With four to 75 percent by volume in air, its explosion range is significantly wider than other gaseous energy sources such as propane or butane. This greatly increases the risk of explosions. This risk is minimized using sliding gate valves. According to the Technical Rules for Hazardous Substances( TRGS), Schubert & Salzer’ s sliding gate valves are permanently leak-tight and meet the requirements of the
The Sliding Gate Valve Type 8621, just one of the models on the market from Schubert & Salzer.
Technical Instructions on Air Quality Controls 2021( TA-Luft 2021) in accordance with EN ISO 15848-1. Special versions are available to achieve body leakage rates of less than 5 x 10-6 mbar l / s and are therefore, suitable even for use in closed rooms.“ In hydrogen applications – whether in production, storage or transport – every component must work absolutely reliably even under demanding conditions,” says Christoph Lukasik, Head of Design and Development at Schubert & Salzer. In addition to the performance of sliding gate valves made from high-grade austenitic steels, they serve as a critical component with the capabilities to deliver reliable flow control, enhanced safety, and longterm operational efficiency in the hydrogen industry.
Sliding gate valve comparison.
About the author Sandro Caravita has been working for many years in marketing at Schubert & Salzer Control Systems, a rapidly growing high-tech company, that develops, produces, and distributes high-precision control valves and reliable shut-off valves for industrial use in process engineering. Directly, through subsidiaries in the Benelux, England, France, India and the USA as well as through more than 40 international partners, Schubert & Salzer offers customers quality products“ Made in Germany”.
www. valve-world. net Valve World December 2025 43