| 摘要 |
<p>A valve (14,16) for handling a hot fluid material such as the coal dust formed in the smelting of direct reduced ore, in which those parts of the valve body (19) in direct contact with the material have double walls which contain a non-fluid medium (22) such as kaowool between them for heat insulating the walls, while those parts (26) which are not so in contact are cooled with a fluid medium such as water. <IMAGE></p> |
