Heat responsive back seat arrangement for valve operator with fu

Details Heat responsive back seat arrangement for valve operator with fu Heat responsive back seat arrangement for valve operator with fu

1978-10-27

1981-01-20

Schwadron, Martin P.

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

92 23, 137553, F16K 1738

Patent

active

042456622

ABSTRACT:
A valve operator for a normally open valve is maintained in a cocked, ready to close mode by an arrangement which includes a radially contracted, self-expansible split retainer ring backed by a body of fusible material. Should the vicinity of the associated valve be subjected to the heat of a fire, the fusible body will melt out of blocking relation, permitting the split ring to expand free of the operator stem. A cocked spring recovers, axially moving the stem both to shut the valve and to engage a metal-to-metal back seat between the valve stem and valve bonnet. The latter event ensures against leakage even if the fire or wear has ruined the integrity of the usual valve stem packing.

REFERENCES:
patent: 3659624 (1972-05-01), Kelly et al.
patent: 3838705 (1974-10-01), Diehl et al.
patent: 3842853 (1974-10-01), Kelly et al.
patent: 3958592 (1976-05-01), Wells et al.

Affiliated with

Also associated with

Rating

Heat responsive back seat arrangement for valve operator with fu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Heat responsive back seat arrangement for valve operator with fu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat responsive back seat arrangement for valve operator with fu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1762083