Shear valve with silicon carbide member
AssigneeAgilent Technologies, Inc.
InventorManfred Berndt
Life of this patent
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Abstract
A shear valve, for use in a high performance liquid chromatography system, comprises a first shear valve member and a second shear valve member. At least one of the first and second shear valve members is adapted to be moved with respect to the other. One of the first and second shear valve members comprises a plurality of ports, and the other comprises at least one fluid path for fluidly coupling respective ones of the ports in dependency on a relative movement position of the first and second shear valve members with respect to each other. The first shear valve member is at least partially coated with or comprised of silicon carbide.
Claims17
A shear valve for use in a high performance liquid chromatography system, the shear valve comprising:
- a first shear valve member;
- a second shear valve member;
- and
- a housing for housing one of the first and the second shear valve members, wherein the housing is shrink-fit to the one of the first and second shear valve members and is prestressed against the housed shear valve member to achieve sealing in pressurized applications,
- wherein at least one of the first and second shear valve members is configured to be moved with respect to the other, one of the first and second shear valve members comprises a plurality of ports, and the other comprises at least one fluid path for fluidly coupling respective ones of the ports in dependency on a relative movement position of the first and second shear valve members with respect to each other,
- wherein the first shear valve member is at least partially coated with or comprised of a ceramic material.
Dependencies are inferred from the claim text.