A valve, comprising: a plurality of segments (12, 14) attached end to end surrounding a central space, each of said segments having first and second circumferentially arranged projections (60, 62) extending toward said central space, each of said segments comprises a channel extending circumferentially around and facing said central space, each of said channels being defined by first and second side surfaces (116,118) located on opposite sides of said segments and a back surface extending between said side surfaces; a valve body positioned within said central space, said valve body having an outer surface facing said segments and an inner surface defining a bore therethrough said first and second circumferentially arranged projections being engageable with said outer surface of said valve body for securing said valve body within said central space; a closing member positioned within said bore, said closing member being movable between an open and a closed configuration; a liner overlying said inner surface of said valve body and surrounding said bore, said liner sealingly engaging said closing member when in said closed configuration, said liner further comprises a ring having first and second lobes (56,58) positioned on opposite sides thereof, said first lobe having a first lobe surface facing toward said first side surface and said second lobe having a second lobe surface facing toward said second side surface, a portion of said first lobe surrounding a first portion of said outer surface of said valve body, said first projections engaging said first portion of said first lobe, a portion of said second lobe surrounding a second portion of said outer surface of said valve body, said second projections engaging said second portion of said second lobe; a stem attached to said closing member for moving said closing member between said open and said closed configuration; and first and second connection members (18,20) positioned at opposite ends of at least two of said segments for effecting end to end attachment of said segments, when said lobes are seated within said channel, at least a portion of said first and second lobe surfaces come into contact respectively with said first and second side surfaces such that said lobes deform toward a center of said channel. a plurality of segments (12, 14) attached end to end surrounding a central space, each of said segments having first and second circumferentially arranged projections (60, 62) extending toward said central space, each of said segments comprises a channel extending circumferentially around and facing said central space, each of said channels being defined by first and second side surfaces (116,118) located on opposite sides of said segments and a back surface extending between said side surfaces; a valve body positioned within said central space, said valve body having an outer surface facing said segments and an inner surface defining a bore therethrough said first and second circumferentially arranged projections being engageable with said outer surface of said valve body for securing said valve body within said central space; a closing member positioned within said bore, said closing member being movable between an open and a closed configuration; a liner overlying said inner surface of said valve body and surrounding said bore, said liner sealingly engaging said closing member when in said closed configuration, said liner further comprises a ring having first and second lobes (56,58) positioned on opposite sides thereof, said first lobe having a first lobe surface facing toward said first side surface and said second lobe having a second lobe surface facing toward said second side surface, a portion of said first lobe surrounding a first portion of said outer surface of said valve body, said first projections engaging said first portion of said first lobe, a portion of said second lobe surrounding a second portion of said outer surface of said valve body, said second projections engaging said second portion of said second lobe; a stem attached to said closing member for moving said closing member between said open and said closed configuration; and first and second connection members (18,20) positioned at opposite ends of at least two of said segments for effecting end to end attachment of said segments, when said lobes are seated within said channel, at least a portion of said first and second lobe surfaces come into contact respectively with said first and second side surfaces such that said lobes deform toward a center of said channel.