User Guide

2 © Copyright 2008 TAC All Rights Reserved. F-26076-2
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.
Normal Position of Valve Assembly
For a valve assembly (valve, linkage, and actuator) to have a normal (spring return) position,
the actuator must be of the spring return type. See Table-2 for the normal position of valve
assemblies.
Specifications
Valve Body Series
VB-7323-0-4-P
Service Chilled or Hot Water
Flow Characteristics Diverting
Sizes 1/2" to 2"
Type of End Fitting NPT
Valve
Materials
Body Bronze
Seat Bronze
Stem Stainless Steel
Plug Stainless Steel
Packing Spring-loaded TFE
Disc None
ANSI Pressure Class (Figure-1) 250 (up to 400 psig below 150°F)
a
Allowable Control Media Temperature 20 to 281°F (-7 to 138°C)
Allowable Differential Pressure for Water
b
35 psi (241 kPa) Max. for Normal Life
(refer to “Cavitation Limitations on Valve
Pressure Drop” on page 6)
Valve Size C
v
Rating k
vs
Rating
c
Complete Valve Body Part Number
1/2" 4.4 3.8 VB-7323-0-4-4
3/4" 7.5 6.5 VB-7323-0-4-6
1" 15 13 VB-7323-0-4-8
1-1/4" 20 17 VB-7323-0-4-9
1-1/2" 28 24 VB-7323-0-4-10
2" 40 35 VB-7323-0-4-11
a
Do not apply above pressure rating to piping system.
b
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.
c
k
vs
= m
3
/h (ΔP = 100 kPa) C
v
= k
vs
x 1.156