Fluid control valve with tubular poppet
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United States of America Patent
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-
Apr 16, 1991
Grant Date -
N/A
app pub date -
Sep 21, 1989
filing date -
Sep 21, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fluid control valve comprises a slidable, tubular poppet member that is biased toward and sealingly engages dual concentric annular valve seats, which valve seats define an annular opening through which the fluid medium flows when the valve is open. When the system pressure reaches a threshold pressure the poppet member is axially displaced from the valve seats such that an annular orifice is opened between the inside edge of the poppet and the inside valve seat and another orifice is formed between the outside edge of the poppet and the outside valve seat through which orifices the fluid medium flows into a central, axially extending relief path partially defined by the inside of the poppet. The dual orifices allow the valve to open with a stroke that is about one-half that of that required in a valve with only one orifice and similar operating range.
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