Valve

Claim 1

An angle ball valve characterized by comprising a valve casing which consists of a main body and a cover member mounted detachably to said main body which has a first flow passage and a second flow passage, each passage being positioned in an angle state, said cover member having a seat holder fitted slidably in its seat holder fitting hole and an adjusting spindle fitting hole at its boss portion, said seat holder having a female screw hole at its boss portion, a valve member which is provided within the valve casing and which has an inlet port communicated always with the first flow passage, an outlet port capable of communicating with the second flow passage, a valve stem fitting hole, and a contacting surface provided around said valve fitting hole; seat rings fitted in the valve casing to support the valve member, one seat ring being fitted in the main body, and another seat ring being fitted in the seat holder; a valve stem arranged at the opposite side to the first flow passage and fitted in the valve stem fitting hole of the valve member at its lower portion, said valve stem being able to rotate the valve member along the axis of the first flow passage; a receiving member mounted on the valve stem which is adjustably and movably engaged with the contacting surface of the valve member at its lower end surface so that the receiving member may receive a partial load to be applied on the valve member; and an adjusting spindle engaged in the female screw hole of the seat holder in its male screw portion and also fitted in the adjusting spindle fitting hole of the cover member so as to rotate merely without moving in the axial direction, whereby it is possible to compensate the contacting state between the seat rings and the valve member by the adjusting movement of the seat holder through the rotation of the adjusting spindle.