| 摘要 |
<p>A ball valve is provided which comprises a valve body (1) formed from a tubular member with a cylindrical hole extending therethrough, a stem (3) having one end thereof projecting into the hole, and a ball (2) fixed to an end of the stem. The ball has a circular bore extending diametrically therethrough, wherein the ball is spherical in shape with removed chordal segments corresponding to the bore. A seat carrier (5) is inserted in the hole, the seat carrier (5) having one end adjacent the ball, a connecting sleeve (6) contacts the seat carrier at the other end thereof opposite the end adjacent the ball, and a union nut (7) couples the connecting sleeve to the valve body (1). A bayonet arrangement of projections (12, 56a) and grooves holds the seat carrer (5) in the valve body (1). A flange (91) is formed on the other end of the seat carrier (5) wherein one of the flange (91) and valve body (1) includes at least one projection (13) and the other of the flange (91) and valve body (1) includes at least one cavity (92). The projection is engaged in the cavity to prevent the rotation of the seat carrier (5) with respect to the valve body.</p> |
