User Guide

VG7000 Series Bronze Control Valves Product Bulletin10
Table 9: Brass Trim – Maximum Closeoff Pressures, psig (kPa) for Pneumatically Actuated Valves (Part 1
of 2)
Actuator
Style
Valve Size,
in. (DN)
Brass Trim
Maximum
Cv (Kv)
Factor
Two-Way Normally Open or
Three-Way N.O. Port
(with 20 psig Supply)
Spring Range (psig
)
1
Two-Way Normally Closed or
Three-Way N.C. Port
(with 0 psig Supply)
Spring Range (psig)
1
3 to 6
2
(21 to 41)
4 to 8
(28 to 55)
9 to 13
(62 to 90)
3 to 6
2
(21 to 41)
4 to 8
(28 to 55)
9 to 13
(62 to 90)
V-3801-8001
(248°F
[120°C])
1/2
(DN15)
0.73
(0.63)
186
(1,282)
157
(1,082)
84
(579)
37
(255)
57
(393)
158
(1,089)
1.8
(1.6)
186
(1,282)
157
(1,082)
84
(579)
37
(255)
57
(393)
158
(1,089)
4.6
(4.0)
105
(723)
89
(613)
48
(331)
18
(124)
28
(193)
76
(524)
3/4
(DN20)
7.3
(6.3)
67
(462)
56
(386)
30
(207)
11
(76)
16
(110)
45
(310)
Stem Up Position
With the stem in the up position,
the lower port (N.O.) is open
to the Common port (C).
C
C
Stem Down Position
With the stem in the down position,
the inline port (N.C.) is open
to the Common port (C).
N.O.
(PDTC)
N.O.
(PDTC)
N.C.
(PDTO)
N.C.
(PDTO)
F
I
G
:V
G
7
F
G
0
2
P
Figure 2: Three-Way Mixing Valves Fluid Flow Direction and Port Designation