Selection Guide

Schneider Electric 839 North Perryville Rd. Rockford, IL 61107 1-888-444-1311 www.schneider-electric.com
F-27649-2 September 2013
© 2013 Schneider Electric. All rights reserved.
VB-7200 Two-Way Globe Valve Bodies
Venta
7
Flow Characteristics
Two-way valves with brass plugs have modified
equal percentage flow curves and valves with
stainless steel plugs have modified linear flow
curves. With modified equal percentage flow
curves, for equal increments of valve stem stroke,
the change in flow rate with respect to valve
stroke may be expressed as a constant percent
of the flow rate at the time of the change. The
change of flow rate with respect to valve stroke
is relatively small when the valve plug is near the
valve seat and relatively high when the valve plug
is nearly wide open. With modified linear flow
curves, the flow is directly proportional to the valve
stem position.
Temperature Pressure Ratings
Consult the appropriate valve linkage general instruction sheet for the effect of
valve body ambient temperatures on specific actuators. Ratings conform with
published values and disclaimer.
VB-72xx-0-4-P (Cast Bronze Body)
Standards: Pressure to ANSI B16.15 Class 250 with 400 psig up to 150° F
decreasing to 321 psig at 281° F, ASTM B584
VB-7200 Valve
Series
VB-7211-0-4
(1/2” to 1-1/4”),
VB-7213, VB-7221-0-4
(1/2” to 1-1/4”),
VB-7223, VB-7214,
VB-7224,
VB-7215, VB-7225
VB-7211-0-3
(1/2” to 1-1/4”),
VB-7212 (1/2”),
VB-7222 (1/2”)
VB-7251-0-3
(1/2” to 1-1/4”),
VB-7251-0-4
(1/2” to 1-1/4”)
VB-7253, VB-7255,
VB-7263, VB-7265
VB-7273, VB-7275,
VB-7283, VB-7285
Body Bronze, ASTM B584
Seat Bronze, ASTM B584 316 Stainless Steel
Stem 316 Stainless Steel
Plug Brass 316 Stainless Steel
Packing Spring-Loaded PTFE/EPDM
Seal 1/2” and 3/4” PTFE
EPDM PTFE
Metal to Metal 316
Stainless Steel
1” to 2” EPDM
Packing and Seal materials: Polytetrafluoroethylene (PTFE), ethylene propylene diene monomer (EPDM)
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Closed OpenStroke
Flow
316 Stainless Trim
Modified Linear
Brass Trim
Modified
Equal
Percentage
400 (204)
Limits for
VB-727X, -728X
Limits for
VB-725X, -726X
Limits for
VB-721X, -722X
0 50 100 150 200 250 300 350 400 psig
(345) (380) (1084) (1379) (1724) (2068) (2458) (2758) kPa
270
(1865)
286
(1973)
321
(2218)
340 (171)
281 (138)
200 (93)
150 (65)
100 (38)
50 (10)
Pressure – psig (kPa)
Temperature – F (C)
1 kPa = .01 bar
Caution: Do not use valves beyond rating of piping system and components.
Consult ANSI B16.22 for ratings of solder joint pressure fittings.
VB-7200 Two-Way Globe Valves Material Specifications
F-27649-1.indd 7 3/28/14 1:09 PM