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Valve seats and electrolyzer frames are among the key applications of Arlon ® 3160XT , while Arlon ® 3555XT is targeting dynamic seals and wear parts in reciprocating or hydraulic compressors , among other applications .
operating pressures , but the materials currently used are reaching their limits . Our Arlon ® 3555XT , a lubricated , cross-linked PEEK grade , tackles these challenges by enabling reciprocating compressors to handle higher pressures and wear conditions more effectively . This advancement is key , as reciprocating compressors offer greater flow rates compared to diaphragm compressors , which , while effective at high pressures , are inherently limited in flow capacity .”
On the centrifugal compressor side , Philippe highlights another challenge : “ Hydrogen ’ s very low molecular weight makes it difficult to compress the gas in a centrifugal compressor . Indeed , the compression ratio between impeller stages is a square function of the impeller ’ s tip speed and inversely proportional to the molecular weight of the gas . For hydrogen compression it is therefore necessary to increase the tip speed beyond the strength of current metallic impellers as their high density induces destructive centrifugal forces .”
collaborating with compressor OEMs to refine our designs further , aiming for 620 meters per second – a goal that remains out of reach for traditional metals . These impellers not only improve efficiency but also extend the lifespan of compressor systems by mitigating embrittlement and wear .”
The company ’ s R & D teams in the U . S . and Switzerland continue to advance this technology , with a third iteration of composite impellers already under development .
Shaping the hydrogen economy
As hydrogen gradually establishes itself as a key element in the clean energy transition , Greene Tweed is committed to enabling its growth through innovation and collaboration . “ Existing materials are often inadequate for the demands of hydrogen applications ,” Philippe observes . “ That ’ s where we come in . Our materials and components not only solve problems but also enable new technologies and applications previously unattainable .”
This is where Greene Tweed ’ s Xycomp ® composite impellers come in . Developed using unique PEEK-based materials , these lightweight , high-strength components overcome the limitations of metal impellers . “ Our second-generation composite impellers have already surpassed tip speeds of 500 meters per second ,” Philippe says . “ We are
By addressing the challenges across production , storage and transportation , and utilization , Greene Tweed plays a vital role in shaping the future of hydrogen . “ We are not just a supplier – we are a partner in innovation ,” Philippe says . “ Together with our customers , we are creating solutions that will power the transition to clean energy .”
Hydrogen Tech World | Issue 20 | February 2025 15