Data Sheet

GX Control Valve and Actuator
D103209X012
Product Bulletin
51.1:GX(S1)
February 2012
17
Table 8 contains information regarding the maximum
pressure drop capability of the GX with a bellows
bonnet and CW2M trim. Maximum pressure drop is
calculated at the maximum supply pressure for each
construction. The allowable leakage classes are given
in table 9.
Table 8. Maximum Pressure Drops with Bellows Bonnet Construction and Low Strength Stem
Valve
Size
Port
Size
Max
Travel
Actua-
tor
con-
struc-
tion
Packing
Air to
Open
Air to Close
Max nP
Supply pressure Max Pressure Limits
2Bar
(29 psi)
2.5 Bar
(36 psi)
3Bar
(44 psi)
3.44 Bar
(50 psi)
4Bar
(58 psi)
5Bar
(72 psi)
6Bar
(87 psi)
nP
Supply
mm mm
bar
(psi)
bar
(psi)
bar
(psi)
bar
(psi)
bar
(psi)
bar
(psi)
bar
(psi)
bar
(psi)
bar
(psi)
bar
(psi)
DN15
to 25
(NPS 1/2
to 1)
4.8 20
225
2Bar
ULF
51.7
(750)
51.7
(750)
51.7
(750)
---
---
51.7
(750)
3.7
(54)
PTFE
225
3Bar
ULF
N/A
51.7
(750)
4.1
(59)
PTFE
225
4Bar
ULF
N/A
PTFE
9.5 20
225
2Bar
ULF
51.7
(750)
51.7
(750)
51.7
(750)
---
---
51.7
(750)
3.7
(54)
PTFE
225
3Bar
ULF
N/A
51.7
(750)
4.1
(59)
PTFE
225
4Bar
ULF
N/A
PTFE
DN20
to 40
(NPS 3/4
to 1-1/2)
14 20
225
2Bar
ULF
51.7
(750)
51.7
(750)
51.7
(750)
---
---
51.7
(750)
3.7
(54)
PTFE
225
3Bar
ULF
N/A
51.7
(750)
4.1
(59)
PTFE
225
4Bar
ULF
N/A
PTFE
DN25
to 50
(NPS 1 to 2
22 20
225
2Bar
ULF
27.3
(396)
39.2
(569)
51.7
(750)
51.7
(750)
---
---
51.7
(750)
3.7
(54)
PTFE
42.0
(609)
51.7
(750)
225
3Bar
ULF
43.4
(629)
N/A
51.7
(750)
4.1
(59)
PTFE
51.7
(750)
225
4Bar
ULF
N/A
PTFE
DN40
to 50
(NPS 1-1/2
to 2)
36 20
225
2Bar
ULF
10.2
(148)
14.6
(212)
25.3
(367)
35.9
(521)
45.3
(657)
---
---
50.9
(738)
3.7
(54)
PTFE
15.7
(228)
20.1
(292)
30.8
(447)
41.4
(600)
50.8
(737)
51.7
(750)
225
3Bar
ULF
16.2
(235)
N/A
25.9
(376)
35.3
(512)
47.2
(685)
49.3
(715)
4.1
(59)
PTFE
21.7
(315)
31.4
(455)
40.8
(592)
51.7
(750)
51.7
(750)
225
4Bar
ULF
28.3
(410)
N/A
47.2
(685)
49.3
(715)
PTFE
33.7
(489)
51.7
(750)
51.7
(750)
-continued-