Pressure reducing valves with multiple heads and seats
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United States of America Patent
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Dec 20, 2016
Grant Date -
Jan 10, 2013
app pub date -
Dec 22, 2010
filing date -
Dec 22, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides a pressure reducing valve. The pressure reduction valve includes a main body, an inlet, an outlet, a stem, a main seat, a pilot diaphragm, a main head, and a control spring. The pressure reduction valve includes additional auxiliary seats with corresponding auxiliary heads and displacement members/surfaces. The pressure reduction valve additional includes auxiliary seats with corresponding auxiliary heads and displacement members/surfaces enables stage wise opening of the secondary seats and the main seat. This enables to meet highly varying media flow demands using single pressure reduction valve, having less hunting effect and eliminating use of multiple pressure reduction valves.
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