Rotary ball valve assembly

摘要

A method of forming a ball valve element (10) for a rotary ball valve assembly, the method comprising the steps of: (a) inserting an impedance element (18) through an insertion opening (22) of a ball valve element (10) into a bore (20); (b) forming a fluid opening (26) in the ball valve element (10) which is non-rectilinearly aligned with the insertion opening (22) and which communicates with the bore (20); and (c) sealing the insertion opening (22). A rotary ball valve assembly comprising a ball valve element (10) formed using such a method are also provided.