Data Sheet
GX Control Valve and Actuator
D103171X012
Product Bulletin
51.1:GX
March 2012
28
Table 24. Fisher GX, Equal Percentage Valve Plug, Flow Up Through the Port (continued)
Equal Percentage - Flow Up
Equal Percentage
Characteristic
Valve
Size
Port
Diameter
Maximum
Travel
Flow
Coeffi-
cient
Valve Opening–Percent of Total Travel
F
L
(1)
mm mm 10 20 30 40 50 60 70 80 90 100
DN 25
(NPS 1)
22 20
C
v
0.673 0.937 1.32 1.89 2.25 3.13 5.05 7.39 10.5 13.7 0.93
K
v
0.582 0.810 1.14 1.63 1.94 2.71 4.36 6.39 9.05 11.9
---
X
T
0.61 0.59 0.58 0.57 0.74 0.82 0.64 0.58 0.68 0.77 ---
F
d
0.09 0.11 0.13 0.15 0.18 0.21 0.25 0.31 0.39 0.49 ---
14 20
C
v
0.139 0.186 0.315 0.511 0.776 1.23 1.97 3.28 5.35 6.89 0.97
K
v
0.120 0.161 0.272 0.442 0.671 1.07 1.70 2.84 4.63 5.96
---
X
T
0.78 0.71 0.59 0.59 0.58 0.51 0.57 0.51 0.67 0.81 ---
F
d
0.08 0.08 0.10 0.13 0.16 0.20 0.26 0.33 0.47 0.59 ---
9.5 20
C
v
0.133 0.222 0.347 0.501 0.699 1.04 1.50 2.15 2.98 3.57 0.95
K
v
0.115 0.192 0.300 0.433 0.605 0.900 1.29 1.86 2.58 3.09
---
X
T
0.77 0.68 0.65 0.61 0.55 0.55 0.58 0.55 0.59 0.68 ---
F
d
0.11 0.13 0.16 0.19 0.22 0.28 0.34 0.44 0.58 0.80 ---
9.5
(2)
20
C
v
0.127 0.149 0.176 0.222 0.311 0.440 0.599 0.828 1.14 1.65 0.95
K
v
0.110 0.129 0.152 0.192 0.269 0.381 0.518 0.716 0.986 1.43
---
X
T
0.311 0.892 0.755 0.681 0.641 0.618 0.595 0.576 0.582 0.543 ---
F
d
0.09 0.09 0.09 0.11 0.13 0.14 0.20 0.24 0.28 0.35 ---
DN 40
(NPS
1-1/2)
36 20
C
v
1.01 1.91 2.74 4.24 6.13 8.25 11.5 16.7 22.0 27.2 0.94
K
v
0.874 1.65 2.37 3.67 5.30 7.14 9.95 14.4 19.0 23.5
---
X
T
0.87 0.93 0.91 0.80 0.89 0.86 0.76 0.79 0.82 0.78 ---
F
d
0.64 0.80 0.87 0.54 0.55 0.50 0.41 0.40 0.43 0.45 ---
22 20
C
v
0.591 0.850 1.20 1.79 2.51 3.50 4.93 7.07 11.0 14.3 0.93
K
v
0.511 0.735 1.04 1.55 2.17 3.03 4.26 6.12 9.52 12.4
---
X
T
0.53 0.51 0.53 0.45 0.45 0.49 0.42 0.47 0.57 0.71 ---
F
d
0.09 0.11 0.13 0.15 0.18 0.21 0.25 0.31 0.39 0.49 ---
14 20
C
v
0.103 0.141 0.254 0.440 0.689 1.11 1.84 3.12 5.12 6.87 0.97
K
v
0.0891 0.122 0.220 0.381 0.596 0.960 1.59 2.70 4.43 5.94
---
X
T
1.00 0.80 0.68 0.67 0.60 0.54 0.55 0.52 0.64 0.77 ---
F
d
0.08 0.08 0.10 0.13 0.16 0.20 0.26 0.33 0.47 0.59 ---
DN 50
(NPS 2)
46 20
C
v
1.08 1.75 3.75 6.04 9.5 14.9 21.8 30.9 37.7 43.7 0.91
K
v
0.931 1.51 3.24 5.22 8.20 12.9 18.9 26.7 32.6 37.8
---
X
T
0.73 0.70 0.79 0.81 0.78 0.81 0.76 0.71 0.82 0.85 ---
F
d
0.70 0.84 0.47 0.48 0.40 0.36 0.37 0.40 0.43 0.45 ---
36 20
C
v
1.08 2.01 2.80 4.26 6.31 8.38 11.6 17.2 23.1 28.6 0.93
K
v
0.931 1.74 2.42 3.69 5.45 7.25 10.0 14.9 20.0 24.7
---
X
T
0.71 0.79 0.86 0.81 0.79 0.79 0.73 0.69 0.75 0.75 ---
F
d
0.64 0.80 0.87 0.54 0.55 0.50 0.41 0.40 0.43 0.45 ---
22 20
C
v
0.591 0.850 1.20 1.79 2.51 3.50 4.93 7.07 11.0 14.3 0.96
K
v
0.511 0.735 1.04 1.55 2.17 3.03 4.26 6.12 9.52 12.4
---
X
T
0.71 0.68 0.61 0.62 0.60 0.60 0.57 0.45 0.60 0.71 ---
F
d
0.09 0.11 0.13 0.15 0.18 0.21 0.25 0.31 0.39 0.49 ---
1. At 100% travel.
2. Restricted trim.
3. Balanced trim.
4. Balanced, restricted trim.
-continued-