公开(公告)号：EP2825878A2

公开(公告)日：2015-01-21

申请号：EP13757441.4

申请日：2013-03-04

申请人： Waters Technologies Corporation

发明人： SHREVE, Joshua, A. ,  AUCLAIR, John, M. ,  KEENAN, Paul ,  DENECKE, Edwin ,  WISSER, Gerald ,  BATES, Edward ,  BERTHIAUME, Eugene ,  BOWER, Michael

IPC分类号： G01N30/36

CPC分类号： F16K1/52 ,  B01D15/40 ,  F16K1/38 ,  F16K15/06 ,  F16K25/005 ,  F16K25/04 ,  F16K31/0655 ,  G01N30/32 ,  G01N30/36 ,  G01N2030/324 ,  G05D16/2013 ,  Y10T137/7904

摘要： The invention generally provides adynamic back pressure regulator. In exemplary embodiments, the back pressure regulator includes an inlet, an outlet, a seat disposed between the inlet and the outlet and defining at least part of a fluid pathway, and a needle displaceable relative to the seat to form a restriction region therebetween for restricting fluid flow between the inlet and the outlet. In some embodiments, the needle can be formed of a chemically resistant ceramic or have a metal plating to provide corrosion and/or erosion resistance.