公开(公告)号：US10364900B2

公开(公告)日：2019-07-30

申请号：US15038895

申请日：2015-01-22

申请人： Hitachi High-Technologies Corporation

发明人： Takaaki Hara ,  Hiroshi Moriya ,  Ayano Otsubo ,  Yoshihiro Nagaoka ,  Kiyotoshi Mori ,  Shoji Tomita

IPC分类号： F16K3/06 ,  G01N30/20 ,  F16K11/074 ,  G01N30/26 ,  G01N30/38

摘要： Provided are: a flow path switching valve that reduces the pressure load in a contact surface outer peripheral section of the flow path switching valve and inhibits friction between constituent components; and a liquid chromatographic device using the flow path switching valve. The flow path switching valve is provided with a stator having a plurality of through holes and a seal having conduction grooves for causing the through holes to conduct. The seal has a first portion present vertically beneath a region comprising at least a surface of contact with the stator, and a second portion having lower rigidity than the first portion, on the outside of the first portion. Due to this configuration, it is possible to reduce the pressure load when a flow path of a liquid is switched under high-pressure conditions, and inhibit the phenomenon of friction itself.