公开(公告)号：US20180313585A1

公开(公告)日：2018-11-01

申请号：US15565324

申请日：2016-04-07

Applicant: Waters Technologies Corporation

Inventor： Michael R. Jackson ,  Christopher Seith ,  Nathan Barrett ,  Kara O'Donnell ,  Neal B. Almeida ,  Wen Lu ,  James E. Usowicz ,  Maruth Sok ,  Kurt D. Joudrey ,  Joshua A. Shreve

IPC: F25B25/00 ,  B01D15/40 ,  B01D15/18 ,  G01N30/30

CPC classification number: F25B25/005 ,  B01D15/40 ,  G01N30/30

Abstract: The present disclosure relates to methodologies, systems and apparatus for cooling pump heads and providing balanced cooling and heat transfer between multiple pump heads. Multi-pump systems that are used to pump fluids that vary greatly in density with minor changes in temperature, such as the mobile phase of a C02-based chromatography system, require highly stable temperature conditions. In order to achieve a substantially equal average heat transfer between multiple pump heads and a coolant fluid, coolant fluid may be flowed through coolant passageways within the pump heads in a recursive and/or parallel coolant flow patterns. Such recursive and/or parallel coolant fluid flow patterns provide increased stability in temperature, compressibility, and density of the fluids passing through a multi-pump system.

公开(公告)号：US20140137967A1

公开(公告)日：2014-05-22

申请号：US14113388

申请日：2012-04-20

Applicant: WATERS TECHNOLOGIES CORPORATION

Inventor： Carl Gang Chen ,  Robert A. Jencks ,  Wen Lu ,  Mark W. Moeller

IPC: F16K25/00 ,  G01N30/20 ,  F16K11/065

CPC classification number: F16K25/005 ,  C23C14/0605 ,  F16K11/0655 ,  F16K11/0743 ,  G01N30/16 ,  G01N30/20 ,  G01N2030/201 ,  G01N2030/202 ,  G01N2030/207 ,  Y10T137/86638 ,  Y10T137/86863

Abstract: A shear valve for use in a high performance liquid chromatography system. The shear valve includes a first valve member having a plurality of first fluid-conveying features, and a second valve member having one or more second fluid-conveying features. The second valve member is movable, relative to the first valve member, between a plurality of discrete positions such that, in each of the discrete positions, at least one of the one or more second fluid-conveying features overlaps with multiple ones of the first fluid conveying features to provide for fluid communication therebetween. At least one of the first and second valve members is at least partially coated with a protective coating that includes an adhesion interlayer and a diamond-like carbon (DLC) layer. The DLC layer is deposited on the adhesion interlayer via filtered cathodic vacuum arc (FCVA) deposition.

Abstract translation: 用于高效液相色谱系统的剪切阀。 剪切阀包括具有多个第一流体输送特征的第一阀构件和具有一个或多个第二流体输送特征的第二阀构件。 第二阀构件可相对于第一阀构件在多个离散位置之间移动，使得在每个离散位置中，一个或多个第二流体输送特征中的至少一个与第一流体输送特征中的多个位置重叠 流体输送特征以提供其间的流体连通。 第一和第二阀构件中的至少一个至少部分地涂覆有包括粘附中间层和类金刚石碳（DLC）层的保护涂层。 通过过滤阴极真空电弧（FCVA）沉积将DLC层沉积在粘附中间层上。