Valves and valve actuation – Rotary valves – Seat or interface seal
Patent
1982-12-09
1984-07-03
Schwadron, Martin P.
Valves and valve actuation
Rotary valves
Seat or interface seal
251368, 277234, F16K 506
Patent
active
044574916
ABSTRACT:
An extreme-temperature annular sealing element and a sealing device using such a sealing element is provided herein. The annular sealing element (10) is composed of a flexible expanded graphite body (14) with a protective metallic sheath (12) over a portion of the outer surface of said flexible expanded graphite body. One end surface (24) of the flexible expanded graphite body is exposed so that the annular sealing element can resiliently respond under repetitive loading and unloading pressures. The metallic sheath is thick enough to be durable yet thin enough to permit the flexible graphite body to resiliently yield and conform to a rotatable opposed member, such as a ball valve.
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EGC Enterprises Incorp.
Schwadron Martin P.
Shay James R.
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