Bidirectional cryogenic valves

Details Bidirectional cryogenic valves Bidirectional cryogenic valves

1984-08-01

1986-04-15

Weakley, Harold W.

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

251173, 251174, 251307, 251317, 251362, 251363, 277213, 277235A, F16K 1226

Patent

active

045820805

ABSTRACT:
A bidirectional valve useful at all temperatures from cryogenic to extreme fire temperatures. The sealing means for the bidirectional valve comprises a metallic sealing element having a pair of spaced sealing lobes defined thereon which are coated with a Teflon compound. A third sealing lobe is defined on the metallic sealing element between the pair of sealing lobes and is constructed solely of metal. A pair of coated sealing lobes further function as wipers to prevent sand, dirt or similar foreign particles from becoming crushed between the valve disc and metallic sealing lobe during the final closing of the valve. When the valve is exposed to fire conditions, the Teflon coated sealing lobes melt out leaving the metallic lobe as the fire safe sealing lobe.

REFERENCES:
patent: 2648582 (1953-08-01), Phillips
patent: 3033582 (1962-05-01), Creavey
patent: 3394915 (1968-07-01), Gachot
patent: 3650508 (1972-03-01), Kosmala
patent: 4022948 (1977-05-01), Smith
patent: 4244387 (1981-01-01), Snape
patent: 4341233 (1982-07-01), Broadway
patent: 4373543 (1983-02-01), Brown

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