A valve for a vacuum apparatus comprising a first housing element and a second housing element connected with the first housing element wherein an outer chamber is defined that the first housing element and the second housing element. The first housing element as a first opening and the second housing element as a second opening in fluent communication with the first opening while the outer chamber. The inner chamber is defined by the first housing element and the second housing element wherein a membrane is disposed in the chamber dividing the inner chamber in a first inner chamber and a second inner chamber. A sealing element is connected to the membrane wherein the sealing element is moveable from a first position to a second position wherein in the first position the sealing element closes the first opening in a leaktight manner and in the second position the sealing element opens the first opening to allow a gaseous medium to flow through the valve.