Productivity is more reliable when equipment can be monitored to detect incipient failures and take corrective action before the plant goes down. But many devices—such as analog control valves, pneumatic valve terminals and field sensors—do not offer diagnostic feedback, or it is not being used. This white paper describes how this problem is being addressed and includes an example of pneumatic valve terminals that can monitor, among other things, open load or coil currents at the specific valve and pressure inside the valve terminal.
Handwheel or automated process valve? The worldwide trend is clearly moving towards automation because it reduces energy and water consumption—especially rinsing water—and increases plant availability. Pneumatic automation of a fixed-bed filter is a good example of this.