Specification Sheet

2 © Copyright 2008 TAC All Rights Reserved. F-24391-2
SPECIFICATIONS
Table-1 Specifications/Models.
Close-off Pressure Rating
The close-off pressure rating is dependent on the size of the valve, valve linkage, and
actuator. Consult the TAC Valve Products Catalog, F-27384, for close-off ratings.
Specifications
Valve Body Series
VB-7283-0-4-P
Service Hot Water and Steam
Flow Characteristics (Figure-1) Equal Percentage
Action Stem Up Closed
Sizes 1/2" to 2"
Type of End Fitting NPT
Valve
Materials
Body Bronze
Seat Stainless Steel
Stem Stainless Steel
Plug Stainless Steel
Packing Spring-loaded TFE
Disc None
ANSI Pressure Class (Figure-2) 250 (up to 400 psig below 150°F)
Maximum Inlet Pressure, Steam 150 psig (1034 kPa)
Allowable Control Media Temperature 20 to 400°F (-7 to 204°C)
Allowable Differential Pressure for Water
a
35 psi (241 kPa) Max. for Normal Life
(refer to “Cavitation Limitations on Valve
Pressure Drop” on page 7)
Allowable Differential Pressure for Steam
a
50 psi (345 kPa)
Valve Size C
v
Rating k
vs
Rating
b
Complete Valve Body Part Number
1/2"
0.4 0.3 VB-7283-0-4-1
1.3 1.1 VB-7283-0-4-2
2.2 1.9 VB-7283-0-4-3
4.4 3.8 VB-7283-0-4-4
3/4"
5.5 4.8 VB-7283-0-4-5
7.5 6.5 VB-7283-0-4-6
1"
10 8.7 VB-7283-0-4-7
12 10 VB-7283-0-4-8
1-1/4" 20 17 VB-7283-0-4-9
1-1/2" 28 24 VB-7283-0-4-10
2" 40 35 VB-7283-0-4-11
a
Maximum recommended differential pressure in open position. Do not exceed recommended differential
pressure (pressure drop) or integrity of parts may be affected. Exceeding maximum recommended differential
pressure voids product warranty.
b
k
vs
= m
3
/h (ΔP = 100 kPa) C
v
= k
vs
x 1.156