| 摘要 |
<p>Disclosed is a flexible sealing ring for a valve having a generally S-shaped cross-section and an extension from one end of that S-shape. The extension is mounted on the valve body and serves as a cantilever means for the sealing ring which is thus sealingly engagable with the peripheral sealing surface of a movable valve member pivotally positioned within the valve passageway. The sealing ring is formed from materials capable of withstanding high temperatures (1000 DEG F.) for sustained periods without impairment of its' sealing capacity. The sealing ring may be used in cooperative combination with other sealing rings, including heat destructible materials such as "Teflon", to form valve seal means effective over a range of temperatures and pressures, including firesafe valve seal means.</p> |
