Greene Tweed, a global leader in advanced materials and high-performance sealing solutions, announced the launch of EPM 893, a PFAS-free ethylene propylene compound engineered to improve sealing reliability in critical hydrogen and carbon capture, utilization, and storage (CCUS) service.
The latest addition to Greene Tweed’s energy transition solutions portfolio, EPM 893 supports a wide range of applications including hydrogen refueling systems, valves, instrumentation, mechanical seals, underground storage, CO₂ compressors, pumps, and pipeline infrastructure.
As hydrogen and CCUS systems scale, seals must withstand high-pressure gas exposure, rapid pressure cycling, aggressive process media, and low-temperature operation conditions that cause conventional elastomers to crack, blister, lose elasticity, or degrade.
In addition, teams are rethinking materials they have long relied on in light of certain per- and polyfluoroalkyl substances (PFAS) regulations. EPM 893 helps address these challenges through low-temperature sealing performance, rapid gas decompression (RGD) resistance, and compatibility with hydrogen, supercritical CO₂, oxygen, and amine-based carbon capture processes, while eliminating PFAS.
“Companies building hydrogen and CCUS infrastructure need partners who can grow with them from production and capture through transport and storage,” said Charles Burke, General Manager, Sealing Systems and Seal-Connect®. “EPM 893 expands a portfolio Greene Tweed is building for that full value chain, and signals where we will continue to invest and deliver end-to-end design expertise for the total sealing system as these markets mature.”
Key features of EPM 893 include:
- Low-temperature performance: Supports continuous operating temperatures down to -60°C (-76°F), with a typical service temperature range of -67°C to 150°C (-89°F to 302°F).
- RGD resistance: Demonstrated rapid gas decompression resistance in hydrogen and supercritical CO₂ environments at pressures up to 200 bar (2,900 psi), helping reduce the risk of blistering and cracking during pressure cycling.
- Broad chemical compatibility: Tested in 100% hydrogen, supercritical CO₂, oxygen service, and amine-based carbon capture environments.
- Third party validated: Tested in accordance with ISO 23936-2, ISO 17268/SAE J2600, and NACE TM0192 industry requirements, and achieves complete elimination of PFAS.
- Application flexibility: Available as O-rings, GT® Rings, and custom-molded shapes for valves, instrumentation, mechanical seals, storage systems, compressors, and CO₂ transport infrastructure.