The control valve sizing calculator given here can be used to estimate the flow coefficient or orifice coefficient of the valve. This flow coefficient for a valve depends on type of valve, pressure & flow conditions and desired inherent characteristic of the valve.
This is something you may need to know for your online degree program in engineering. Here is some helpful information.
The table given below, provides valve specific factors for a variety of valves.
|Valve type||Trim Type||Cf||XT|
|Globe, single port||3 V-port plug||0.9||0.7|
|4 V-port plug||0.9||0.7|
|6 V-port plug||0.9||0.7|
|60 diameter hole drilled cage||0.9||0.68|
|120 equal diameter hole drilled cage||0.9||0.68|
|Characterized cage, 4 port||0.9||0.75|
|Globe, double port||Ported Plug||0.9||0.75|
|Globe, angle||Contoured plug||0.9||0.72|
|Characterized cage, 4 port||0.9||0.65|
|Globe, small flow trim||V-notch||0.98||0.84|
|Rotary||Eccentric spherical plug||0.85||0.6|
|Eccentric conical plug||0.77||0.54|
|Butterfly (centered shaft)||Swing-through (70 °)||0.62||0.35|
|Swing-through (60 °)||0.7||0.42|
|Fluted vane (70 °)||0.67||0.38|
|High performance butterfly (eccentric shaft)||Offset seat (70 °)||0.67||0.35|
|Ball||Full bore (70 °)||0.74||0.42|