VALVE CASE HISTORY: TIGHT CONTROL KEEPS THE LID ON

A manufacturer of lids for the food industry was developing a new lid in their R&D lab.  The lab’s retort (pressure cooker) was using traditional control valves (rising stem globe) with a 3-15PSI signal.  The problem arose when the control valves could not control the retorts pressure and temperature at the desired response time.

Our solution incorporated a Gosco characterized ball valve and a vane style pneumatic actuator with modulating control.  The 10-degree V ball resulted in tighter control parameters enhanced by the vane actuator and 4-20ma positioner. 

As a result, with the V ball control valve, greater accuracy was achieved by the retort to successfully develop the new lid.  By using the characterized ball technology, the R&D lab was able to use the existing retort pressure vessel, avoiding the expense of engineering and procuring a new, larger retort.