Data Sheet
GX 3--Way Valve and Actuator
Product Bulletin
51.1:GX 3--Way
August 2011
23
Table 16. Fisher GX 3--Way, Bottom Port Common (BPC) Diverging, Linear
Bottom P ort Common (BPC) Diverging
Linear
Characteristic
Valve
Size
Maximum
Travel
Exit Port
(see
figure 9)
Flow
Coeffi-
cient
Valve Opening—Percent of Total Travel (see figure 10)
F
L
(1)
mm
0
(Plug Down)
10 20 30 40 50 60 70 80 90
100
(Plug Up)
DN25/
NPS 1
19
Right
Cv 16.3 15.5 14.4 13.3 12.0 10.1 7.72 5.32 3.18 1.49 0 0.965
Kv 14.1 13.4 12.5 11.5 10.4 8.70 6.68 4.61 2.75 1.29 0 -- -- --
Xt 0.661 0.670 0.691 0.655 0.608 0.577 0.523 0.556 0.533 0.474 0 -- -- --
Left
Cv 0 1.67 3.03 4.58 6.32 8.41 10.6 12.0 13.7 14.7 15.5 0.886
Kv 0 1.45 2.62 3.96 5.46 7.27 9.18 10.4 11.9 12.8 13.4 -- -- --
Xt 0 0.810 0.623 0.667 0.639 0.620 0.637 0.631 0.637 0.664 0.666 -- -- --
DN40/
NPS
1--1/2
19
Right
Cv 32.5 30.5 28.7 25.2 21.9 18.5 14.8 10.6 6.46 2.89 0 0.820
Kv 28.1 26.4 24.8 21.8 18.9 16.0 12.8 9.16 5.58 2.50 0 -- -- --
Xt 0.786 0.738 0.661 0.626 0.523 0.486 0.470 0.467 0.479 0.426 0 -- -- --
Left
Cv 0 3.30 6.21 10.34 14.5 18.2 22.7 26.4 29.1 31.2 33.5 0.923
Kv 0 2.85 5.37 8.94 12.56 15.7 19.7 22.9 25.1 27.0 29.0 -- -- --
Xt 0 0.812 0.661 0.502 0.553 0.660 0.721 0.764 0.799 0.815 0.784 -- -- --
DN50/
NPS 2
19
Right
Cv 58.9 53.1 47.1 40.7 34.1 27.0 20.7 14.6 9.54 4.61 0 0.950
Kv 50.9 45.9 40.7 35.2 29.5 23.4 17.9 12.6 8.26 3.99 0 -- -- --
Xt 0.600 0.639 0.561 0.574 0.536 0.473 0.475 0.508 0.501 0.536 0 -- -- --
Left
Cv 0 4.89 8.60 13.4 20.5 28.2 36.6 44.9 50.9 56.0 60.0 0.893
Kv 0 4.23 7.43 11.6 17.8 24.4 31.7 38.8 44.0 48.4 51.9 -- -- --
Xt 0 0.553 0.674 0.610 0.575 0.599 0.598 0.607 0.632 0.647 0.619 -- -- --
DN80/
NPS 3
38
Right
Cv 155.9 151.9 139.6 126.6 108.8 90.8 69.0 49.0 30.8 15.1 0 0.935
Kv 134.9 131.4 120.7 109.5 94.1 78.5 59.7 42.4 26.6 13.1 0 -- -- --
Xt 0.640 0.595 0.578 0.532 0.500 0.451 0.453 0.462 0.471 0.465 0 -- -- --
Left
Cv 0 12.0 27.7 47.9 68.3 87.7 104.5 120.0 136.5 154.7 170.3 0.862
Kv 0 10.4 24.0 41.4 59.1 75.8 90.4 103.8 118.1 133.8 147.3 -- -- --
Xt 0 0.605 0.556 0.596 0.650 0.680 0.706 0.719 0.713 0.664 0.642 -- -- --
DN100/
NPS 4
38
Right
Cv 166.3 152.9 139.7 121.1 98.0 77.1 60.3 42.9 27.0 13.0 0 0.901
Kv 143.9 132.3 120.8 104.8 84.8 66.7 52.2 37.1 23.3 11.2 0 -- -- --
Xt 0.675 0.631 0.533 0.510 0.530 0.526 0.503 0.520 0.520 0.542 0 -- -- --
Left
Cv 0 11.3 26.9 46.1 63.8 82.2 102.0 121.1 137.6 153.2 169.1 0.866
Kv 0 9.8 23.2 39.9 55.2 71.1 88.2 104.8 119.0 132.5 146.3 -- -- --
Xt 0 0.657 0.583 0.615 0.704 0.727 0.716 0.696 0.723 0.703 0.669 -- -- --
1. At maximum flow.