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A replaceable cartridge valve assembly adapted for use in a sanitary fitting which includes a pair of discs, each disc having at least one opening or orifice therein to provide the valving function and an auxiliary valve means is disclosed. The valve assembly is made in the form of a removable cartridge and includes an arrangement of the valve stem which cooperates with an opening in the cartridge housing to provide the auxiliary valve means for throttling downstream from the at least one disc orifice of the disc valve means to provide a stepdown in pressure drop and thereby inhibit and/or reduce cavitation and other objectionable noises.
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