Valve seats and valve assemblies for fluid end applications
AssigneeKennametal Inc.
InventorsRoger M. Stark, Carrie Bartkowiak, John Brosnahan, Michael Kelly
Life of this patent
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Abstract
In one aspect, valve seats are described herein having structure and design addressing degradative stresses encountered by the seats during installation and operation in fluid ends. In some embodiments, a valve seat for use in a fluid end comprises a first section for insertion into a fluid passageway of the fluid end and a second section extending longitudinally from the first section, the second section comprising a frusto-conical valve mating surface, wherein the second section is encased in a ring imparting a compressive stress condition to the second section.
Claims8
A fluid end comprising:
- a suction fluid passageway and a discharge fluid passageway;
- and
- a valve assembly in at least one of the suction and discharge fluid passageways, the valve assembly comprising a valve in reciprocating contact with a valve seat, the valve seat comprising a body including a first section for insertion into the suction or discharge fluid passageway and a second section extending longitudinally from the first section, the second section comprising a recess in which a sintered cemented carbide inlay is positioned, wherein the sintered cemented carbide inlay comprises a valve mating surface and exhibits a compressive stress condition substantially equal to a compressive stress condition of the first section.
Dependencies are inferred from the claim text.