Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1990-07-31
1991-08-06
Rivell, John
Fluid handling
Line condition change responsive valves
Direct response valves
137543, 137536, 210117, 210136, F16K 1502, B01D 2124
Patent
active
050368826
ABSTRACT:
A pressure responsive valve assembly for use in a decanting apparatus for a wastewater treatment reactor. The valve assembly includes a cylindrical valve plate, a valve member support structure, a valve spring, and a valve member comprising a valve stem and a valve head. A discharge passageway extending through the valve plate has a frusto-conical valve seat located therein. The valve head also has a frusto-conical design having an angle of divergence smaller than that of the valve seat so that when the valve head is biased against the valve seat by the valve spring, the valve seat sealingly engages a peripheral edge of the valve seat. The valve member support structure maintains the valve member in proper alignment with the valve seat and in engaging relationship with the valve spring. The valve assembly is configured so as to reduce the ability of sludge to pass through the valve during mix cycles or to settle on the valve assembly during settling cycles of a wastewater treatment process thereby reducing the possibility that such sludge will subsequently be withdrawn from the reactor with decanted liquid during the decanting cycle.
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Augustyn James E.
Nelson Dennis L.
Norcross Kenneth L.
Willis Aaron D.
JMO Holding, Inc.
Rivell John
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