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VGF FLANGED GLOBE VALVES
63-2618—01
8
Table 7. VGF3 B-Port Threads.
IMPORTANT
Valve sizing is important for correct system opera-
tion. Undersized valves do not have sufficient
capacity at maximum load. Oversized valves do not
have sufficient authority over the load in modulat-
ing applications.
Oversized valves can initiate hunting and the seat
and throttling plug can be damaged because of
the restricted opening. Some variables that must
be determined are:
•Medium (steam, water, glycol solution 50 percent
maximum) to be controlled.
•Maximum temperature and pressure of the
medium at the valve.
•Pressure differential that exists across the valve
under maximum load conditions.
•Maximum capacity the valve must deliver.
•Maximum line pressure differential against which
the valve actuator must close.
Fig. 3. Dimensions for two-way models in inches (mm)
(See Table 8).
Fig. 4. Dimensions for three-way models in inches (mm)
(See Table 8).
Model
Thread
# of Holes
VGF31EM25
0.625-11
4
VGF31EM30
0.625-11
4
VGF31EM40
0.625-11
8
VGF31EM50
0.750-10
8
VGF31EM60
0.750-10
8
VGF32EM25
0.750-10
8
VGF32EM30
0.750-10
8
VGF32EM40
0.750-10
8
VGF32EM50
0.750-10
8
VGF32EM60
0.750-10
12
VGF31LD25
0.625-11
4
VGF31LD30
0.625-11
4
VGF31LD40
0.625-11
8
VGF31LD50
0.750-10
8
VGF31LD60
0.750-10
8
VGF32LD25
0.750-10
8
VGF32LD30
0.750-10
8
VGF32LD40
0.750-10
8
VGF32LD50
0.750-10
8
VGF32LD60
0.750-10
12
M22420
D
A
B
E
C
Stroke Y
1 DOTTED LINE REPRESENTS ANSI 125
VALVE BODY.
M22409
D
A
C
B
1 DOTTED LINE REPRESENTS ANSI 125
VALVE BONNET.
1
E
Stroke Y