Packing materials for valves in hydrogen service

With over 50 years of experience with hydrogen, the Swedish company Askalon with competence in valves, valve service and valve diagnostics, has a wealth of expertise in providing innovative solutions for hydrogen applications. Its deep understanding of the unique challenges associated with hydrogen service has enabled it to supply solutions specifically designed for this demanding environment.

“Our commitment to safety and reliability has earned us a reputation as a trusted partner for the industry’s most challenging hydrogen applications,” says country manager in Denmark, Morten Noppenau.

Control valves are an essential component of any system that involves the distribution of hydrogen, as they are responsible for regulating the flow and pressure of hydrogen.

Morten Noppenau explains that valve packings play a critical role in maintaining the integrity of fluid or gas distribution systems. “This is especially important when it comes to valves in hydrogen service, as the hydrogen molecule tend to diffuse or escape easier than any other gasses.”

Compressible materials are used to create a leak-proof seal between the valve stem and body, preventing fluid or gas from escaping. The right valve packing selection is crucial to ensure safe, efficient, and reliable operation in various applications.

Emerson Fisher Enviro-Seal and ISO-Seal are two of the most used packing materials in hydrogen service thanks to their high performance and reliability. Their ability to accommodate changes in temperature and pressure, combined with their low friction and flexible design, make them ideal for use in a wide range of process applications.

“Additionally, their ISO and environmental certifications, respectively, make them a natural choice when it comes to packing solutions for hydrogen service,” says Morten Noppenau.

ISO-Seal is a high-performance mechanical seal designed to meet the demanding requirements of hydrogen service. It features a series of rings made from materials like PTFE or graphite, arranged in a specific pattern to create a barrier between the pressurized hydrogen and the environment. ISO-Seal is known for its low friction, high flexibility, and ability to accommodate changes in temperature and pressure, making it an ideal choice for hydrogen service applications.

Enviro-Seal is a mechanical sealing solution designed for hydrogen service applications with a focus on environmental responsibility. The Enviro-Seal packing is typically made from environmentally friendly materials, such as PTFE or graphite, and is designed to minimize the release of toxic or hazardous substances.

“Its low friction and flexible design, combined with its environmentally friendly materials, make Enviro-Seal a popular choice for hydrogen service applications where environmental considerations is important.”

In conclusion, valve packings are a critical component of fluid and gas flow systems, providing a vital seal to prevent leaks and ensure safe and reliable operation.

“With 50 years of experience in the valve industry working with hydrogen, we know that right valve packing selection is crucial to achieving the desired safety, performance, and longevity of a system.”

Various materials are available to suit different applications, each with its own set of benefits and drawbacks. It is important to consider the process conditions such as, temperature and pressure, and compatibility with the valve when selecting the right valve packing.

Morten Noppenau added: “Investing in proper valve packing can lead to reduced downtime, improved system performance, and overall peace of mind.”