GATE VALVE

摘要

PURPOSE: A gate valve is provided to secure a simple structure including a groove for mounting a bead by inserting the bead into a lamination surface and elevating an upper ring by rotating a middle ring. CONSTITUTION: A valve body(100) connects an upper accommodation space and a lower accommodation space which are separated from each other by a partition wall(101) through a through-hole(104). A valve plate(200) is formed on a valve plate accommodation space of the valve body to open and close a fluid path. A valve plate driving unit(300) slides the valve plate. A protection ring(400) closely adheres the fluid path to an upper opening part while the fluid path is opened. A protection ring driving part(500) drives the protection ring.