| 摘要 |
<p>@ A valve has a body (12) with a valve chamber (14) therein, an inlet (16) into the valve chamber, an outlet (18) from the valve chamber and an opening to the valve chamber aligned with the outlet, and a bonnet (20) secured to the body covering the opening, the bonnet having a tubular projection (24). A valve seat insert (34) having a valve seat (60) is positioned in the outlet, and a valve member (58) is movable toward and away from the valve seat to control flow through the valve. The valve seat insert (34) is releasably secured to the bonnet tubular projection (24). The insert is removable from the body with the bonnet (20) making it easy to replace.</p> |
