CHARACTERIZATION OF QUICK OPENING CONTROL VALVE FOR PROCESS FLUID THROTTLING APPLICATIONS

Abstract

Background: Control valve is the significant component in closed loop process control applications. The loop performance is impacted by the control valve. The ideal characteristics will differ from installed characteristics. The valve should exhibit the Ideal characteristics with no external load influences. This paper considered quick opening trim valves. The valves are ¾ inch size operating with quick opening trims. The fluid throttling through the control valve is recorded with varying suction head pressure. The fluid flow rate at 100 percent open is estimated as2.201 for quick opening control valve. With varying input signal to the actuating element of the control valve, the inflow rate, outflow rate, upstream and downstream pressures, valve capacity (CV) are computed, and the differential pressure developed across the control valve is characterized. Fluid velocity is also estimated across the control valve. With the results achieved quick opening control valves, these valves are reliable for tight shutoff applications.