| 摘要 |
<p>1531983 Fire fighting in valves T KUROSAWA 9 Jan 1976 [22 Feb 1975] 00863/76 Heading ASA [Also in Divisions F2 and G1] A thermally foamable plastics element 3 provides means whereby fluid flow through a casing 1 is shut off or relieved in response to increasing ambient temperature. The element may be simply built-in the casing as shown, encapsulated as in Figs. 3, 5 and 6 (not shown), in web form, Fig. 4 (not shown) or contained separately from the flow path and adapted to actuate a mechanical valve as in Figs. 8, 9, 10 (not shown). Heat pipes (39) (72) Figs. 7, 10 (not shown) may be used to accelerate activation of the element in response to an emergancy rise in ambient temperature.</p> |
