A valve apparatus, in particular a ball valve apparatus, is provided. The apparatus includes a housing device having at least one fluid port, a closure body, wherein the closure body includes an axis of rotation about which the closure body can be rotated in a direction of rotation in order to release and close the fluid port, wherein the fluid port includes a seal for sealing abutment against the closure body. The seal includes a first and a second sealing lip, wherein the sealing lips are configured such that, during operation, only one seal sealingly abuts against the closure body.