SHUT-OFF VALVE CONTROL DEVICE, SHUT-OFF VALVE CONTROL SYSTEM, METHOD FOR CALCULATING SHUT-OFF VALVE CONTROL COEFFICIENT, AND METHOD FOR CONTROLLING SHUT-OFF VALVE

摘要

Provided are: a shut-off valve control device which is capable of reducing the difference between a set opening amount and the actual opening amount, when executing a partial valve stroke test; a shut-off valve control system; a method for calculating a shut-off valve control coefficient; and a method for controlling a shut-off valve. This shut-off valve control device is provided with a microcomputer (7) for controlling the opening and closing of a solenoid valve (5) which supplies air from an air supply source (11), to a cylinder (31) of an air cylinder (3) for controlling a valve shaft (1b) of a shut-off valve (1), and discharges said air. The microcomputer (7) acquires a set opening amount of the shut-off valve (1). Furthermore, the microcomputer (7) controls the solenoid valve (5) to a value obtained by dividing the acquired set opening amount by a predetermined coefficient C.