| 摘要 |
The gate valve includes a valve housing ( 12 ) having a fluid conduit ( 14 ) and defining a valve seat ( 16 ) and a support surface ( 18 ), a seal plate ( 20 ), a counter plate ( 22 ) having cushion ( 72 ) vulcanized to a surface facing the support surface ( 18 ), and an actuator ( 34 ) for moving the seal plate and the counter plate between respective open and closed positions. The cushion is configured to prevent metal-to-metal contact between the counter plate and the support surface of the valve housing.
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