METHODS AND APPARATUS TO PARTIAL STROKE TEST VALVES USING PRESSURE CONTROL

摘要

Methods and apparatus to partial stroke test valves using pressure control are disclosed. An example method includes generating a first pressure set point for a valve positioner coupled to an actuator to actuate a valve. The first pressure set point is associated with a partial stroke test of the valve. The example method also includes controlling an output pressure of the positioner towards the first pressure set point to actuate the valve in a stroke direction. The example method further includes determining whether the valve is stuck based on the output pressure.