Perforated disc and valve comprising the same

A valve having a longitudinal valve axis, comprising:

• a valve seat body having a valve seat surface;
• a valve closing body interacting with the valve seat surface;
• and
• an orifice plate composed of at least one metallic material and situated downstream of the valve seat surface, the orifice plate including:
• an upper functional region having at least one inlet orifice,
• a lower functional region having at least one outlet orifice, and
• a center functional region having at least one channel and being positioned between the upper functional region and the lower functional region, the at least one channel facilitating a fluid to completely flow from the at least one inlet orifice to the at least one outlet orifice,
• wherein the upper, lower and center functional regions form a one-piece unit,
• wherein the at least one channel has an entrance cross-sectional surface area and an exit cross-sectional surface area, the entrance cross-sectional surface area being a product of, on the one hand, at least one circumference of the at least one inlet orifice and, on the other hand, a height of the at least one channel transverse to a cross-section of the at least one inlet orifice, the exit cross-sectional surface area being a product of, on the one hand, at least one circumference of the at least one outlet orifice and, on the other hand, a height of the at least one channel transverse to a cross-section of the at least one outlet orifice, and
• wherein the entrance cross-sectional surface area is larger than the exit cross-sectional surface area.