Lip seal

Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed

Patent

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Details

251309, 251335A, F16K 502

Patent

active

043336329

ABSTRACT:
A plug valve is provided with primary, secondary and tertiary seals. The primary seal includes an apertured sleeve which envelopes a plug portion of a valving member. The secondary and tertiary seals are provided by a delta ring and a lip of a diaphragm respectfully. The diaphragm is formed with a hollow annular groove proximal to the stem portion of the valving member. The delta ring is placed in this hollow annular groove with an interference fit to form a secondary seal between itself and the valving member and to augment the tertiary seal formed between a lip of the diaphragm and the valving member.

REFERENCES:
patent: 3506239 (1970-04-01), Johnson
patent: 3508573 (1970-04-01), Smith
patent: 3540740 (1970-11-01), Smith
patent: 3709910 (1972-11-01), Smith
patent: 4159818 (1979-07-01), Hoos
Duriron Bulletin V-24, 9/1972, regarding Sleeveline Valves.

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