| 摘要 |
The present invention relates to valve assemblies. In one embodiment of the invention, a temperature-sensitive safety valve assembly comprises a first region which contains a first pressurised fluid, and a second region which contains a second pressurised fluid. The second region comprises a heat- sensitive sealing means. A valve is arranged between the first and second regions. In a first configuration, the pressure of the second pressurised fluid in the second region overcomes the pressure of the first pressurised fluid to actuate the valve to open the first outlet. The heat-sensitive sealing means in the second region is, in a second configuration, arranged to fail at high temperature so as to de-pressurise the second region, thereby actuating the valve to move under the first pressurised fluid in the first region so as to close the first outlet and seal the first region. Other improvements to valve assemblies are also disclosed. |
