Overview of Primary Product

VGF FLANGED GLOBE VALVES
63-1301 2
Fig. 1. Dimensions for two-way models in inches (mm)
(See Table 4).
Fig. 2. Dimensions for three-way models in inches (mm)
(See Table 4).
IMPORTANT
Valve sizing is important for correct system operation. Undersized valves do not have sufficient capacity at maximum
load. Oversized valves do not have sufficient authority over the load in modulating applications.
Oversized valves can initiate cycling 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.
The presence of iron oxide (red rust) in the system voids the valve warranty.
Table 2. VGF2 2-way.
VGF2 Valve, Globe, Flanged, 2-way
1 ANSI 125
2 ANSI 250
EP Equal percent flow, pressure-balanced
a
ES Equal percent flow, standard
LP Linear flow, pressure-balanced
a
LS Linear flow, standard
a
25 2-1/2 in. ports
30 3 in. ports
40 4 in. ports
50 5 in. ports
60 6 in. ports
a
ANSI 125 only
VGF2 1 EP 30
e.g.: 3 in. flanged, equal percent, pressure
balanced, ANSI 125
Table 3. VGF3 3-way.
VGF3 Valve, Globe, Flanged, 3-way
1 ANSI 125
2 ANSI 250
EM Equal percent flow, mixing
LD Linear flow, diverting
25 2-1/2 in. ports
30 3 in. ports
40 4 in. ports
50 5 in. ports
60 6 in. ports
VGF32EM40 e.g.: 4 in. flanged mixing valve, ANSI 250
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