Stuffing box seal for fittings

Details Stuffing box seal for fittings Stuffing box seal for fittings

1978-02-15

1979-05-29

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277125, 277233, 277237R, 285378, 285422, 251214, 115 74, F16J 1500, F16K 4102, F16K 2504

Patent

active

041565290

ABSTRACT:
The stuffing box chamber in a fitting, particularly a valve, contains a deformable stuffing box seal. The seal includes conventional sealing material and a constituent material such as zinc or aluminum having a standard potential that is less positive in the electrochemical potential series than the potential of the material defining the stuffing box chamber, i.e., the constituent material is less precious. Dust, granules or filaments of less precious material are mixed with the standard sealing material. Another embodiment includes alternating layers of discs made from the conventional and less precious materials. A further embodiment provides that the less precious material is an envelope or coating surrounding the conventional sealing material.

REFERENCES:
patent: 894791 (1908-07-01), Barnett
patent: 1483631 (1924-02-01), Forbes
patent: 1572922 (1926-02-01), Jovers et al.
patent: 1646735 (1927-10-01), Mills
patent: 1925268 (1933-09-01), Mellor
patent: 2240021 (1941-04-01), Rutherford
patent: 2299813 (1942-10-01), Franks
patent: 3620943 (1971-11-01), White
patent: 3761055 (1973-09-01), Ebuchi et al.
Mechanical Engineers' Handbook, (McGraw-Hill Book Co., Inc., New York), 1958, 6th Ed., Baumeister, et al., Editors, pp. 6-122 and 6-123.

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