Fluid flow control device
First Claim
1. A fluid flow control device comprising a plurality of pairs of annular discs forming a rigid structure which incorporates a series of substantially radial passageways running from an inner edge to an outer edge of said annular discs for fluid flow,each disc of said pair having two major faces and passageways which extend completely through said disc between said major faces but extend only partially in a radial direction,the discs of each pair being substantially identical and being aligned with one another with a major face of one disc in direct abutment with a major face of the other disc such that the passageways in said one disc interconnect with the passageways in the other disc of the pair so as to provide for said fluid flow through the pair of substantially identical discs.
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Reexamination
Accused Products
Abstract
A fluid flow control device for use in a variable fluid restrictor control valve or severe service control valve. These valves employ a moveable plug and are used to control high pressure fluids e.g. superheated steam. The control device of the invention includes annular discs with fluid passageways through them. Pairs of discs together form a radial passageway for fluid between the interior of a stack of discs and its radially outer circumference. The passageways may have a smaller cross-section at a mid-region of the disc than at the radially inner or outer side of the disc.
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Citations
10 Claims
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1. A fluid flow control device comprising a plurality of pairs of annular discs forming a rigid structure which incorporates a series of substantially radial passageways running from an inner edge to an outer edge of said annular discs for fluid flow,
each disc of said pair having two major faces and passageways which extend completely through said disc between said major faces but extend only partially in a radial direction, the discs of each pair being substantially identical and being aligned with one another with a major face of one disc in direct abutment with a major face of the other disc such that the passageways in said one disc interconnect with the passageways in the other disc of the pair so as to provide for said fluid flow through the pair of substantially identical discs.
Specification