Swing check valve with internally balanced disc
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 12, 1982
Issued Date -
N/A
app pub date -
Mar 16, 1981
filing date -
Dec 6, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A check valve construction is provided which is free of friction imparting elements such as a labyrinth seal or a stuffing box with internal packing having an external mounted counterweight. One embodiment is of the power assist type constructed with convenient means for local daily testing the free swing portion of the check valve while another embodiment includes a manual test device. The valves may include friction free disc position indicators.
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Family
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Cited Art Landscape
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