Steam trap, aseptic double seated valve, method of operating the steam trap, and filling plant

A steam trap for aseptic double seated valves in beverage or food filling plants, which, on an intake side, is connected to at least one drain valve of a double seated valve and to an outlet, and which includes a seat valve comprising a closure element with a conical sealing face and a seat with a conical seating area, said seat valve being adapted to be switched at least between an open position for a first discharge state with large throughput and a closed position for a second discharge state with small throughput,

• wherein at the closed position, the closure element and the seat allow a flow through a jetlike passage, said jetlike passage having a cross-section, which, in a discharge direction, exhibits first a constriction and enlarges after said constriction, and being delimited by the seating area, the conical sealing face and at least one control groove in the sealing face and/or the seating area.