| 摘要 |
<p>The present invention is directed to improved valves having removable interior wear rings and valves containing the removable wear rings. In an example, the wear ring comprises a high-hardness metal ring, the high hardness metal ring having an exterior surface configured to engage the body of gate valve. A polymeric overlay covers at least a portion of the exterior surface of the metal ring, the polymeric overlay forming the final dimensional shape of the wear ring.</p> |
