Data Sheet
GX 3--Way Valve and Actuator
Product Bulletin
51.1:GX 3--Way
August 2011
24
Table 17. Fisher GX 3--Way, Bottom Port Common (BPC) Converging, Linear
Bottom Port Common (BPC) Converging
Linear
Characteristic
Valve
Size
Maximum
Travel
Inlet Port
(see
figure 11)
Flow
Coeffi-
cient
Valve Opening—Percent of Total Travel (see figure 12)
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 16.4 14.4 12.8 11.7 10.7 9.64 8.58 6.27 3.80 1.08 0 0.973
Kv 14.2 12.4 11.1 10.1 9.23 8.34 7.42 5.42 3.29 0.93 0 -- -- --
Xt 0.668 0.650 0.691 0.571 0.495 0.397 0.324 0.312 0.291 0.652 0 -- -- --
Left
Cv 0 1.45 2.56 3.93 5.46 7.08 8.83 10.9 13.3 15.3 16.5 0.935
Kv 0 1.25 2.22 3.40 4.73 6.12 7.64 9.39 11.5 13.2 14.3 -- -- --
Xt 0 0.702 0.784 0.725 0.720 0.710 0.722 0.717 0.678 0.609 0.597 -- -- --
DN40/
NPS
1--1/2
19
Right
Cv 36.8 32.3 25.6 21.3 17.5 12.5 10.3 8.22 4.63 2.34 0 0.804
Kv 31.9 28.0 22.1 18.4 15.1 10.8 8.94 7.11 4.00 2.02 0 -- -- --
Xt 0.540 0.538 0.675 0.661 0.613 0.723 0.690 0.575 0.595 0.634 0 -- -- --
Left
Cv 0 3.36 5.99 9.42 13.3 17.4 22.4 27.4 33.8 37.5 41.5 0.878
Kv 0 2.91 5.18 8.15 11.5 15.0 19.4 23.7 29.2 32.5 35.9 -- -- --
Xt 0 0.625 0.659 0.593 0.598 0.645 0.637 0.695 0.643 0.641 0.603 -- -- --
DN50/
NPS 2
19
Right
Cv 59.9 50.9 42.8 35.6 29.6 23.1 17.5 13.8 9.75 6.01 0 0.882
Kv 51.8 44.0 37.0 30.8 25.6 20.0 15.2 11.9 8.43 5.20 0 -- -- --
Xt 0.560 0.569 0.609 0.634 0.611 0.613 0.571 0.490 0.387 0.256 0 -- -- --
Left
Cv 0 4.84 8.90 14.2 19.2 25.4 32.8 40.0 47.1 53.4 57.8 0.935
Kv 0 4.19 7.70 12.3 16.6 21.9 28.4 34.6 40.7 46.2 50.0 -- -- --
Xt 0 0.504 0.575 0.549 0.641 0.692 0.696 0.693 0.707 0.722 0.723 -- -- --
DN80/
NPS 3
38
Right
Cv 158.7 142.5 125.3 102.8 80.3 61.0 45.8 33.1 20.8 10.6 0 0.813
Kv 137.2 123.3 108.4 88.9 69.5 52.8 39.6 28.7 18.0 9.18 0 -- -- --
Xt 0.558 0.578 0.553 0.549 0.600 0.663 0.665 0.653 0.714 0.705 0 -- -- --
Left
Cv 0 12.1 25.7 43.8 63.1 83.1 102.7 120.4 135.7 151.1 164.9 0.931
Kv 0 10.5 22.2 37.9 54.6 71.9 88.9 104.1 117.4 130.7 142.6 -- -- --
Xt 0 0.525 0.579 0.619 0.660 0.658 0.676 0.685 0.701 0.691 0.670 -- -- --
DN100/
NPS 4
38
Right
Cv 155.9 145.0 127.4 107.6 85.9 66.4 49.4 35.6 23.6 12.2 0 0.810
Kv 134.9 125.4 110.2 93.0 74.3 57.5 42.7 30.8 20.4 10.5 0 -- -- --
Xt 0.564 0.550 0.518 0.504 0.545 0.593 0.628 0.621 0.601 0.553 0 -- -- --
Left
Cv 0 13.5 28.9 48.9 69.5 90.6 111.1 129.2 145.4 159.9 174.4 0.830
Kv 0 11.7 25.0 42.3 60.1 78.4 96.1 111.8 125.8 138.3 150.8 -- -- --
Xt 0 0.427 0.477 0.525 0.553 0.564 0.590 0.637 0.667 0.686 0.676 -- -- --
1. At maximum flow.
Emerson Process Management
Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Chatham, Kent ME4 4QZ UK
Dubai, United Arab Emirates
Singapore 128461 Singapore
EFisher Controls International LLC 2008, 2011; All Rights Reserved
www.Fisher.com
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they
are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or
applicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the
designs or specifications of such products at any time without notice. Neither Emerson, Emerson Process Management, nor any of their affiliated
entities assumes responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use, and maintenance of
any product remains solely with the purchaser and end user.
Fisher, FIELDVUE, and ValveLink are marks owned by one of the companies in the Emerson Process Management business division of Emerson
Electric Co. Emerson Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. HART is
a mark owned by the HART Communications Foundation. F
OUNDATION fieldbus is a mark owned by the Fieldbus Foundation. All other marks are
the property of their respective owners.