Low differential check valve for sprinkler systems
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United States of America Patent
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-
Dec 14, 1999
Grant Date -
N/A
app pub date -
May 18, 1998
filing date -
May 18, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A low differential check valve is provided for a fire control system, having particular adaptability in a dry system. The check valve is maintained in its closed position by a latch which is controlled by a plunger. The plunger is activated, and moved to release the latch, upon the sensing of drop in system air pressure by a higher differential mechanism external of the check valve. The check valve may then be reset, with its clapper moved to its closed condition, without requiring internal access of the check valve to release a clapper latch.
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Family
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Cited Art Landscape
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