This study investigates the effect of the attached fitting on the valve flow coefficient. Four types of fittings were mounted on the downstream of a valve. It is concluded that the valve flow coefficient must be corrected by a piping geometric factor around 0.81, regardless of the type of the fitting attached.
IEC60534-2-1.Industrial-process control valves: flow capacity - sizing equations for fluid flow under installed conditions, 1998 (International Electrotechnical Commission, Geneva, Switzerland).
2.
IEC60534-2-3.Industrial-process control valves: flow capacity - test procedures, 1997 (International Electrotechnical Commission, Geneva, Switzerland).
3.
EomK.Performance of butterfly valves as flow controllerJ. Fluid Eng., 1988, 110, 16–19.
4.
FuW. S.GerJ. S.A concise method for determining a valve flow coefficient of a valve under compressible gas flowExp. Therm. Fluid Sci., 1999, 18, 307–313.
