Patent ID: 8349516

Claim:
A seal arrangement for sealing a mechanical joint between two components of a fuel cell device, which components convey a fluid process medium in a media chamber; said arrangement comprising: a first sealing member which is configured to extend around the media chamber in an installed state, in active connection with the components, wherein the first sealing member has an inner side facing the media chamber and an outer side facing away from the media chamber and the first sealing member is a quad ring with a substantially square cross-section; and a second sealing member having an inner side that radially surrounds the outer side of the first sealing member, wherein the second sealing member is an O-ring with a substantially round cross-section, wherein one of material and the geometry of the first sealing member is such that the first sealing member provides a liquid seal; one of the material and geometry of the second sealing member is such that the second sealing member provides a gas seal; and the material of the first sealing member has a hardness that is greater than a hardness of the material of the second sealing member.