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. |
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 |