A valve assembly comprising: a first energy dissipating means with a plurality of apertures for reducing the pressure of a fluid from a first pressure to a second lower pressure, a second energy dissipating means with a plurality of apertures for reducing the fluid pressure from the second pressure to a third pressure lower than the second pressure, and a valve closing means for opening and closing the valve, wherein the valve closing means is configured to continuously or gradually occlude the plurality of apertures of the first energy dissipating means when closing the valve, and wherein the geometry of the plurality of apertures of the first energy dissipating means is such that when closing the valve, the open passage of the apertures of the first energy dissipating means decreases faster than the opening degree of the total valve assembly at least for a predetermined range of opening degrees of the total valve assembly including the closed state, in particular in a range of 0% to 10%, more in particular in a range of 0% to 30% of the opening degree of the valve assembly, the valve closing means comprises a first wall element configured to continuously or gradually occlude the plurality of apertures provided in a second wall element of the second energy dissipating means when closing the valve, the first and second wall element (47, 41) are configured and arranged such that in the closed state of the valve assembly a clearance is formed between the first and second wall element, the geometry of the plurality of apertures of the first energy dissipating means and the geometry of the plurality of apertures of the second energy dissipating means is such that independently of the opening state, in particular in an opening range of at least 10 to 100%, of the valve assembly, the pressure drop at the first energy dissipating means is at least 50%, preferably in a range of 50 to 70% of the total pressure drop, and at least one of the apertures of the first energy dissipating means is shaped such that its width in its lower part is smaller than its width in its upper part, wherein the first energy dissipating means comprises a valve seat comprising: a bottom wall, and a circumferential wall extending upwardly from the bottom wall and defining an inner chamber, wherein the plurality of apertures of the first energy dissipating means is formed in a lower part of the circumferential wall, and wherein the corners of the apertures of the first energy dissipating means are rounded. a first energy dissipating means with a plurality of apertures for reducing the pressure of a fluid from a first pressure to a second lower pressure, a second energy dissipating means with a plurality of apertures for reducing the fluid pressure from the second pressure to a third pressure lower than the second pressure, and a valve closing means for opening and closing the valve, wherein the valve closing means is configured to continuously or gradually occlude the plurality of apertures of the first energy dissipating means when closing the valve, and wherein the geometry of the plurality of apertures of the first energy dissipating means is such that when closing the valve, the open passage of the apertures of the first energy dissipating means decreases faster than the opening degree of the total valve assembly at least for a predetermined range of opening degrees of the total valve assembly including the closed state, in particular in a range of 0% to 10%, more in particular in a range of 0% to 30% of the opening degree of the valve assembly, the valve closing means comprises a first wall element configured to continuously or gradually occlude the plurality of apertures provided in a second wall element of the second energy dissipating means when closing the valve, the first and second wall element (47, 41) are configured and arranged such that in the closed state of the valve assembly a clearance is formed between the first and second wall element, the geometry of the plurality of apertures of the first energy dissipating means and the geometry of the plurality of apertures of the second energy dissipating means is such that independently of the opening state, in particular in an opening range of at least 10 to 100%, of the valve assembly, the pressure drop at the first energy dissipating means is at least 50%, preferably in a range of 50 to 70% of the total pressure drop, and at least one of the apertures of the first energy dissipating means is shaped such that its width in its lower part is smaller than its width in its upper part, wherein the first energy dissipating means comprises a valve seat comprising: a bottom wall, and a circumferential wall extending upwardly from the bottom wall and defining an inner chamber, wherein the plurality of apertures of the first energy dissipating means is formed in a lower part of the circumferential wall, and wherein the corners of the apertures of the first energy dissipating means are rounded. a bottom wall, and a circumferential wall extending upwardly from the bottom wall and defining an inner chamber, wherein the plurality of apertures of the first energy dissipating means is formed in a lower part of the circumferential wall, and wherein the corners of the apertures of the first energy dissipating means are rounded.