摘要 |
<p>At least one of a valve body (29), a sealing tip (25), and a vessel or conduit (10) includes at least one space (5) formed therein between an interior of the vessel or conduit (10) and an internal cavity (23) of the valve (13). The space (5) includes an active or passive thermal insulation (7) forming at least a partial barrier to the flow of heat between the internal cavity (23) and the interior of the vessel or conduit (10).</p> |