Temperature sensitive valve bonnet assembly

Details Temperature sensitive valve bonnet assembly Temperature sensitive valve bonnet assembly

F - Mech Eng,Light,Heat,Weapons

16

K

251/56, 137/4.3

F16K 17/38 (2006.01) F16K 41/14 (2006.01) F16K 41/18 (2006.01)

Patent

CA 1220400

TEMPERATURE SENSITIVE VALVE BONNET ASSEMBLY ABSTRACT OF THE DISCLOSURE A valve having a normally non-rising stem (30a,b) journaled between bearings (38a,b 40a,b) is equipped with an energized drive spring (56a,b) for positively engaging backseat seal surfaces (64a,b, 66a,b) upon melting of a fusible ring (52a,b). The spring (56a,b) is compressed axially against the retainer (46a,b) by the cooperative action of the compression nut (58a,b) and the tubular spacer (49b, 50a,b), thereby normally avoiding undesirable axial thrust on the bearings (38a,b, 40a,b). C831360

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