Valve stem-to-bonnet backseat

Details Valve stem-to-bonnet backseat Valve stem-to-bonnet backseat

1983-09-30

1985-04-16

Rosenthal, A.

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

137 72, 251330, F16K 4116, F16K 1738

Patent

active

045109605

ABSTRACT:
A stem-operated fire-resistant gate valve including an improved metal-to-metal stem backseat a eutectic ring assembly for facilitating automatic stem backseating at pre-selected temperatures, spring enhancement of the backseating procedure, and a lost motion connection between the valve stem and the valve closure element.

REFERENCES:
patent: 2784933 (1957-03-01), Newell et al.
patent: 4245661 (1981-01-01), McGee
patent: 4373700 (1983-02-01), Buchta

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