Reference Manual

5−8
Table 5-4. Representative Sizing Coefficients for ED Single-Ported Globe Style Valve Bodies
Valve Size
(inches)
Valve Plug Style Flow Characteristic
Port Dia.
(in.)
Rated
Travel
(in.)
C
V
F
L
X
T
F
D
1/2 Post Guided Equal Percentage 0.38 0.50 2.41 0.90 0.54 0.61
3/4 Post Guided Equal Percentage 0.56 0.50 5.92 0.84 0.61 0.61
1
Micro Form
Cage Guided
Equal Percentage
Linear
Equal Percentage
3/8
1/2
3/4
1 5/16
1 5/16
3/4
3/4
3/4
3/4
3/4
3.07
4.91
8.84
20.6
17.2
0.89
0.93
0.97
0.84
0.88
0.66
0.80
0.92
0.64
0.67
0.72
0.67
0.62
0.34
0.38
1 1/2
Micro-Form
Cage Guided
Equal Percentage
Linear
Equal Percentage
3/8
1/2
3/4
1 7/8
1 7/8
3/4
3/4
3/4
3/4
3/4
3.20
5.18
10.2
39.2
35.8
0.84
0.91
0.92
0.82
0.84
0.65
0.71
0.80
0.66
0.68
0.72
0.67
0.62
0.34
0.38
2
Cage Guided Linear
Equal Percentage
2 5/16
2 5/16
1 1/8
1 1/8
72.9
59.7
0.77
0.85
0.64
0.69
0.33
0.31
3
Cage Guided Linear
Equal Percentage
3 7/16 1 1/2 148
136
0.82
0.82
0.62
0.68
0.30
0.32
4
Cage Guided Linear
Equal Percentage
4 3/8 2 236
224
0.82
0.82
0.69
0.72
0.28
0.28
6
Cage Guided Linear
Equal Percentage
7 2 433
394
0.84
0.85
0.74
0.78
0.28
0.26
8
Cage Guided Linear
Equal Percentage
8 3 846
818
0.87
0.86
0.81
0.81
0.31
0.26