| 摘要 |
<p>A flow valve comprising two valve members (7, 24) having contacting flat surfaces (5, 17), one containing spaced inlet and outlet fluid passages (8, 10) and the other an intermediate passage (26), the valve members being mounted such that relative rotation of the flat surfaces can be effected to locate the intermediate passage either fully or partially in or out of communication with the inlet and outlet passages, a channel (40) being provided around at least part of the periphery of the contacting flat surfaces to receive molten metal and dross leaked between them.</p> |
