Rotary fluid control valve - has spherical controller with diametrical bore which aligns with opposed openings in housing

摘要

The valve comprises a casing which defines a receptacle having a main axis. The receptacle has a pair of opposed ports for forming a flow way having an axis disposed at an acute angle to the main axis. The flow control element is rotatably within the receptacle. The element has an axis of rotation coaxial with the main axis. The body of the control element defines an axial open bore in register with the flow ports at the fully-opened position of the control element. A pair of elongated orifice slots extend circumferentially through the wall of the control element's body. At least one slot is defined by wall converging towards its trailing end. A chamber surrounds the walls of the axial bore in the control element's body.