EMERGENCY SHUTOFF DEVICE AND EMERGENCY SHUTOFF SYSTEM PROVIDED WITH SAME

摘要

An emergency shutoff device is provided with: a casing (21) in which an inflow port (22) for causing control oil to flow into a space (A1) formed therein, and a plurality of outflow ports (23) for causing the control oil to flow out of the space (A1) are formed; and a switching unit (24) which changes its position relative to the plurality of outflow ports (23) by sliding along an inner circumferential surface of the casing (21) forming the space (A1), thereby switching a circulation state of the control oil in the space (A1). The switching unit (24) switches the circulation state between a first circulation state in which the control oil is circulated from a first inflow port (221) to a first outflow port (231), and a third circulation state in which an open/closed state of a test outflow port (236) is switched while the control oil is being circulated from the first inflow port (221) to the first outflow port (231).