Isolation damper with replaceable seal unit

Details Isolation damper with replaceable seal unit Isolation damper with replaceable seal unit

1995-12-05

1997-08-26

Fox, John

Valves and valve actuation

Reciprocating valve

Gate

251329, F16K 300

Patent

active

056603711

ABSTRACT:
An isolation damper for positioning in a duct passageway has a housing which forms a sealing chamber. The housing has a removable access panel for providing access to the sealing chamber. The damper has a blade which is capable of being actuated between an open position, wherein it allows passage of gas through the housing, and a closed position, wherein the passage of gas through the housing is blocked. A replaceable seal unit is slidably positionable within the sealing chamber by removing the access panel. The seal unit includes a first sealing plate and a second sealing plate. Each plate has an opening formed therein to allow passage of gas therethrough. Further, each plate also has a flexible sealing member attached thereto and extending about the periphery of the opening. The sealing members contact opposite surfaces of the blade when the blade is in its closed position to prevent passage of gas through the housing.

REFERENCES:
patent: 3000608 (1961-09-01), Williams
patent: 3689028 (1972-09-01), Dickenson et al.
patent: 4749168 (1988-06-01), Maxwell et al.

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