Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2005-12-13
2005-12-13
Fox, John (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C251S362000
Reexamination Certificate
active
06973941
ABSTRACT:
A control valve that reduces noise and controls flow includes a slotted cylindrical skirt and/or a tapered metal ring. The metal ring has a tapered external surface for engaging a matching tapered bore within a valve housing. One embodiment is directed to a control valve including a housing defining a central orifice in fluid in communication with an inlet port and an outlet port, and a movable valve plug assembly having a skirt portion slidably engaged within the central orifice to control fluid flowing through the housing. The skirt portion defines a plurality of openings, which can be slots, to gradually control the flow of fluid through the housing while reducing cavitation. A method of controlling fluid flow in a process includes receiving fluids via an inlet port of a control valve, and controlling the flow of the fluid via a movable skirted valve plug with a plurality of tapered slots.
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Fisher Controls International LLC
Fox John
Marshall & Gerstein & Borun LLP
LandOfFree
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