The international company Furmanite has introduced Trevitest, an improved version of its
on-line valve testing system. Recent developments to the system now enable it to be used in even the most difficult or hazardous conditions. Trevitest saves customers time and money by avoiding the need to remove the valves from the process line, testing them on-line at normal operating pressures and temperatures. The new developments now mean that this can also be applied to valves that do not react dynamically, or in volatile conditions that would normally require a hot work permit. The Trevitest system operates by means of a hydraulic power pack and load cell linked to a computer-based recorder, to apply a force to the valve spindle, overcoming the spring tension. The data obtained is then used to determine set pressure, spring adjustment seat lift, and an indication of reseat pressure. A new acoustic transducer option now offers a number of benefits. For example, it helps determine the exact opening point of the valve, so that even valves that do not open cleanly or have a pronounced simmer can be set accurately.
