Dresser/Cooper Three Piece Ball Valves -Vavle Flow Coefficient Charts

Standard Port
Valve Size (inches)	Approximate Cv
1/4 & 3/8	9
1/2	9
3/4	17
1	35
1-1/4	55
1-1/2	55
2	140
2-1/2	220
3	360

Full Port
Valve Size (inches)	Approximate Cv
1/4 & 3/8	10
1/2	19
3/4	35
1	60
1-1/4	95
1-1/2	140
2	230
2-1/2	360
3	590