| 摘要 |
<p>A heat sensitive valve including a body having an inlet, an outlet, a valve chamber and a valve seat surrounding the opening between the inlet and the outlet, a bonnet connected to the body with a bore therethrough in communication with the valve chamber, a valve member positioned in said valve chamber and coacting with said valve seat to open and close flow through said valve, a stem connected to said valve member extending through the bore of said bonnet, a pressure responsive actuator connected to said stem with means of supplying and venting pressure fluid to an from said actuator, a housing secured to the bonnet, a linkage supported by said housing in an extended position, having means for engaging the outer end of the stem, heat sensitive means for retaining the linkage in its extended position supporting the stem and means biasing the linkage away from its extended position when said heat sensitive means releases the linkage to thereby remove support retaining said valve member in its innermost position.</p> |
