Why Sealing Systems Are Critical for TA Luft Compliance
In industrial valves, fugitive emissions primarily occur at dynamic stem seals and flange connections. Even the smallest leaks can result in the release of volatile organic compounds (VOCs) or other process-critical media.
For this reason, TA Luft-compliant valves are tested for tightness under defined operating conditions. One of the key standards applied today is DIN EN ISO 15848, which specifies testing procedures for valves with low fugitive emission performance. The objective is to ensure consistently low leakage rates throughout the entire service life of the valve.
However, selecting a high-quality valve alone is not sufficient. Only the interaction of valve body design, material selection, surface finish and an optimally engineered sealing system ensures consistently low emission levels.
Materials Used in Modern Sealing Systems
Different sealing materials are used depending on the process medium, operating temperature and pressure. Expanded graphite, PTFE-based materials and high-performance composite materials are among the most widely used sealing solutions.
Graphite packings offer excellent resistance to temperatures of several hundred degrees Celsius as well as outstanding chemical resistance. They are regarded as the standard solution for demanding applications in refineries, power generation and the chemical process industry.
PTFE-based seals, on the other hand, provide excellent resistance to aggressive chemicals and are particularly suitable for applications requiring high purity standards. Modern composite materials combine the advantages of different material technologies, enabling even lower leakage rates while extending maintenance intervals.
At the same time, PFAS-reduced and PFAS-free sealing solutions are becoming increasingly important. This trend is driven by ongoing regulatory developments within Europe and the growing sustainability requirements of the process industries.
Valve Design Determines Emission Performance
In addition to the sealing material itself, the valve design plays a decisive role in emission control. Multi-layer gland packing arrangements, optimized live-loading spring systems and adjustable packing assemblies help maintain the required sealing stress even after numerous operating cycles.
Particularly in frequently operated control and isolation valves, sealing systems must withstand millions of operating cycles without significant wear. At the same time, friction levels must remain low to minimize operating torque.
For plant operators, this translates into higher process reliability, extended maintenance intervals and a lower total cost of ownership.
Manufacturers Focus on Certified Sealing Technologies
International manufacturers continue to invest in the development of low-emission sealing systems, including packing solutions specifically designed to meet the requirements of TA Luft and ISO 15848. They also regularly publish technical guidance for OEMs and plant operators.
Manufacturers such as Klinger, IDT, Techno-Parts and GFD are among the established suppliers of high-performance sealing technologies. Their products are used in numerous TA Luft-compliant valve designs. These companies, or their international organizations, are also exhibitors at Valve World Expo 2026.
Digitalization Supports Predictive Maintenance
Besides the sealing system itself, valve condition monitoring is becoming increasingly important. Digital monitoring technologies enable operators to detect changes in operating forces or leakage rates at an early stage. Predictive maintenance concepts help schedule maintenance activities more efficiently while minimizing unplanned plant shutdowns.
Particularly in emission-critical installations, digital technologies help operators meet both environmental regulations and economic performance targets.
Valve World Expo 2026 – The Industry's Meeting Point
A comprehensive overview of the latest developments will be presented at Valve World Expo 2026. The international trade fair is widely recognized as the world's leading platform for industrial valves, sealing technology, actuators and flow control solutions.
From 1 to 3 December 2026, manufacturers, plant operators, engineering companies and industry experts will gather in Düsseldorf, Germany, to discuss new products, advanced materials and innovative testing methods. Running alongside the exhibition, the Valve World Conference will provide insights into current standards, material technologies, hydrogen applications and low-emission solutions.
