User Guide

2 © Copyright 2008 TAC All Rights Reserved. F-24381-2
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 the
valve assemblies.
Table-2 Required Compatible Actuators/Linkages.
Specifications
Valve Body Series
VB-7212-0-4-P
Service Chilled or Hot Water and Steam
Flow Characteristics (Figure-1) Equal Percentage
Action Stem Up Open
Sizes 5/8" O.D.
Type of End Fitting 45° SAE Flared
Valve
Materials
Body Bronze
Seat Bronze
Stem Stainless Steel
Plug Brass
Packing Spring-loaded TFE
Disc EPDM
ANSI Pressure Class (Figure-2) 250 (up to 400 psig below 150°F)
a
Maximum Inlet Pressure, Steam 35 psig (241 kPa)
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)
Allowable Differential Pressure for Steam
b
20 psi (138 kPa)
Valve Size C
v
Rating k
vs
Rating
c
Complete Valve Body Part Number
1/2"
0.4 0.3 VB-7212-0-4-1
1.3 1.1 VB-7212-0-4-2
2.2 1.9 VB-7212-0-4-3
4.4 3.8 VB-7212-0-4-4
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
Actuator Series Required Valve Linkage Normal Position
MA-5210, MA-5211, MA-5213 AV-7600
a
Stem Up
Normally Open
MF-5413, MF-5513 AV-7600 & AV-601
MF-22203, MF-22303, MF-22323 Included w/Actuator None (Non-spring Return Actuator)
MK-2690 AV-7400
Stem Up
Normally Open
MK-4601, MK-4611, MK-4621 AV-401
MP-5210, MP-5211, MP-5213 AV-7600
a
MP-5410, MP-5411, MP-5413
AV-7600 & AV-601
MP-5511, MP-5513
MPR-5610, MPR-5611, MPR-5613
MPR-5713
MS-22353 Included w/Actuator None
a
High ambient temperatures with high media temperatures in the valve may require the use of AV-601 in addition
to AV-7600. See General Instructions for AV-7600 (F-26235) and AV-601 (F-19069) for details.