A coupling for joining pipe elements (46, 48) in end to end relation, said coupling comprising: a plurality of segments (14, 16) attached to one another end to end and surrounding a central space, each of said segments (14, 16) having a channel extending circumferentially around and facing said central space, each of said channels being defined by first and second side surfaces (32, 34) located on opposite sides of said segments (14, 16) and a back surface extending between said side surfaces (32, 34); a seal positioned within said central space, said seal comprising a ring having first and second lobes (42, 44) positioned on opposite sides thereof, said first lobe (42, 44) having a first lobe surface facing toward said first side surface and said second lobe (42, 44) having a second lobe surface facing toward said second side surface;when said seal is seated within said channel, at least a portion of said first and second lobe surfaces (42a, 44a) being in contact with said sidewalls such that said lobes (42, 44) deform toward a center of said channel, and connection members being positioned at opposite ends of each of said segments (14, 16), said connection members being adjustably tightenable for drawing said segments (14, 16) toward one another and seating said ring within said channel, thereby deforming said lobes (42, 44), wherein when said seal is in an undeformed state, said first lobe surface is oriented angularly with respect to said first side surface and said second lobe surface is oriented angularly with respect to said second side surface, said coupling further comprising a first gland attached to said first lobe (42, 44) and a second gland attached to said second lobe (42, 44), said first and second glands (52, 54) extending circumferentially about said ring, said first gland having a first sealing surface, said second gland having a second sealing surface, said first and second sealing surfaces facing said central space; characterized by said coupling comprising a first spring element positioned on said first gland opposite to said first sealing surface; a second spring element positioned on said second gland opposite to said second sealing surface, said spring elements extending circumferentially around said ring and biasing said first and second sealing surfaces toward said central space. a plurality of segments (14, 16) attached to one another end to end and surrounding a central space, each of said segments (14, 16) having a channel extending circumferentially around and facing said central space, each of said channels being defined by first and second side surfaces (32, 34) located on opposite sides of said segments (14, 16) and a back surface extending between said side surfaces (32, 34); a seal positioned within said central space, said seal comprising a ring having first and second lobes (42, 44) positioned on opposite sides thereof, said first lobe (42, 44) having a first lobe surface facing toward said first side surface and said second lobe (42, 44) having a second lobe surface facing toward said second side surface;when said seal is seated within said channel, at least a portion of said first and second lobe surfaces (42a, 44a) being in contact with said sidewalls such that said lobes (42, 44) deform toward a center of said channel, and connection members being positioned at opposite ends of each of said segments (14, 16), said connection members being adjustably tightenable for drawing said segments (14, 16) toward one another and seating said ring within said channel, thereby deforming said lobes (42, 44), wherein when said seal is in an undeformed state, said first lobe surface is oriented angularly with respect to said first side surface and said second lobe surface is oriented angularly with respect to said second side surface, said coupling further comprising a first gland attached to said first lobe (42, 44) and a second gland attached to said second lobe (42, 44), said first and second glands (52, 54) extending circumferentially about said ring, said first gland having a first sealing surface, said second gland having a second sealing surface, said first and second sealing surfaces facing said central space; characterized by said coupling comprising a first spring element positioned on said first gland opposite to said first sealing surface; a second spring element positioned on said second gland opposite to said second sealing surface, said spring elements extending circumferentially around said ring and biasing said first and second sealing surfaces toward said central space.