DuPont™ Vespel® hydrogen valve seals provide long life and perform in environments with pressures up to 103 MPa (15,000 psi).
Vehicles powered by fuel cell technology require hydrogen valves with dependable seals. Vespel®, with low hydrogen permeation, is the material of choice for:
• Safety/shut-off valves
• Pressure control valves
• Purge/drain valves
Vespel parts are suitable for cryogenic hydrogen valves providing "soft but strong" sealing properties at liquid hydrogen temperatures of -253 °C (-423 °F). They can also resist wear in frequently operated control valves, as well as resist the high temperatures that can occur in supersonic gas flows through the constricted valve opening before expansion cools the gas.