Valve and construction machine with the same

摘要

Provided is a valve (10) restrained from unintentional close. The valve (10) includes a valve element (11) formed with a flow-path hole (13), a holding member (12) having inlet and outlet ports (18A, 18B) and holding the valve element (11) while permitting its rotational movement in first and second directions, and a rotational restriction section. The valve element (11) has an open position for making communication between the ports (18A and 18B) through the flow-path hole (13) and a close position for blocking between the ports (18A and 18B). The rotational restriction section restricts the rotational movement so as to stop the rotational movement thereof in the first direction at the open position where a specific part (14) of the outer peripheral surface (14) of the valve element (11) overlaps the inlet port (18) and receives pressure of the liquid to allow the pressure to impart a rotational bias in the first direction to the valve element (11) in the open position.