초록 ▼

A volume control insert for a ball valve that is attachable in a fluid passage of the ball valve to provide a predetermined flow condition therethrough. The insert has a convex shape corresponding to an outer surface of a valving member seated in the ball valve, and has a connector disposed on its p

A volume control insert for a ball valve that is attachable in a fluid passage of the ball valve to provide a predetermined flow condition therethrough. The insert has a convex shape corresponding to an outer surface of a valving member seated in the ball valve, and has a connector disposed on its periphery to attach the insert across the fluid passage. The insert has an elongate slot through it, such as an oblong or parabolic shaped opening, adapted to provide the predetermined flow condition. A plurality of such inserts may be furnished with a ball valve to provide a range of predetermined flow conditions that may be individually selected for the ball valve. Preferably, each of the inserts include a parabolic opening therethrough, the parabolic opening providing a substantially equal percentage flow characteristic between maximum and minimum flow rate conditions when the valving member is rotated each degree of movement between its full open and full closed positions.

대표청구항 ▼

[ What is claimed is:] [9.] A ball valve for providing a plurality of predetermined flow conditions therethrough, said ball valve comprising:a valve housing having upstream and downstream passages extending therethrough, said upstream and downstream passages extending into and out of a valve seat wi

[ What is claimed is:] [9.] A ball valve for providing a plurality of predetermined flow conditions therethrough, said ball valve comprising:a valve housing having upstream and downstream passages extending therethrough, said upstream and downstream passages extending into and out of a valve seat within said valve housing, thereby defining a longitudinal axis through said valve seat;a valving member rotatably mounted within said valve seat, said valving member having a bore extending therethrough, said bore being alignable with said longitudinal axis, said bore and said upstream and downstream passages together defining a fluid passage through said valve housing; anda plurality of disk-shaped inserts individually attachable across said fluid passage, each of said plurality of inserts having an opening therethrough adapted to provide a predetermined flow condition through said fluid passage.