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1. (WO2015122253) FLOW PATH SWITCHING VALVE AND LIQUID CHROMATOGRAPHIC DEVICE USING SUCH VALVE

Pub. No.:    WO/2015/122253    International Application No.:    PCT/JP2015/051603
Publication Date: Fri Aug 21 01:59:59 CEST 2015 International Filing Date: Fri Jan 23 00:59:59 CET 2015
IPC: F16K 3/04
G01N 30/26
Applicants: HITACHI HIGH-TECHNOLOGIES CORPORATION
株式会社日立ハイテクノロジーズ
Inventors: HARA Takaaki
原  誉明
MORIYA Hiroshi
守谷 浩志
MORI Kiyotoshi
森  聖年
TOMITA Shoji
富田 将司
OTSUBO Ayano
大坪 綾乃
NAGAOKA Yoshihiro
長岡 嘉浩
Title: FLOW PATH SWITCHING VALVE AND LIQUID CHROMATOGRAPHIC DEVICE USING SUCH VALVE
Abstract:
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.