Flow control valve

摘要

The improved flow control valve includes a hollow valve body having an inlet and an outlet and a valve member movable therein to control the flow through the valve. The valve also includes an orifice assembly located in the valve body encircling the valve member. The orifice assembly includes a perforated cylindrical member encircling the valve member and a plurality of annular discs encircling the cylindrical member. The discs include both orifice discs and spacer discs. The orifice discs are located between the spacer discs and each orifice disc is provided with a plurality of orifices. Each spacer disc is provided with a plurality of flow ports that are arranged to aligned serially with the orifices which provide a long curvilinear or spiral flow path through the orifice assembly.