Hydraulic double valve

摘要

A control valve system in which main valves are actuated and deactuated by operation of pilot valves. Actuation of pilot valves causes actuation of the main valves, which enables fluid pressure to be output from the control valve system. The main valves must shift within a predetermined time period in order to prevent an error condition. A timing chamber stores a predetermined amount of fluid to define a time period in which the main valves must shift.