User Guide

F-27086-7 Copyright 2007 TAC All Rights Reserved. 3
Features and Benefits
Ball Valve Assembly Selection Procedure
When selecting a ball valve assembly, you must determine the applicable codes for the control signal type, valve body
configuration, end connection, port size, and actuator. Select a ball valve assembly part number as follows:
1. Control Signal Type, Valve Body Configuration, and End Connection
Referring to “Part Numbering System” on page 4 or page 5 , select the appropriate codes for these part number fields.
2. Valve Size (Flow Coefficient)
If the required flow coefficient (Cv) has not yet been determined, do so as follows:
a. Refer to the “Sizing and Selection” section on pages 28 to 32, to calculate the required Cv.
b. Select the nearest available Cv and corresponding valve body port code from Table-1 (2-way) or Table-2 (3-way) on
page 6.
Note: If this results in a valve that is smaller than pipe size, the actual effective Cv of the installed valve will vary from
the nominal Cv as shown in Table-9 on page 31 (2-way valves) and Table-10 on page 32 (3-way valves).
3. Actuator
Select the appropriate actuator and code, according to “Part Numbering System” on page 4 or page 5, based on the control
signal type, required valve normal position, and voltage requirements. For detailed actuator information, refer to the appli-
cable actuator specifications on page 12, 15, 18, 21, or 24.
Note: Ball Valve Assemblies with TAC DuraDrive actuators use the basic actuators. However, if an actuator with auxiliary
switch(es) is required, you may field-assemble a ball valve assembly using a ball valve body/linkage assembly
(VB-2x13-500-9-xx). For information on switch-equipped actuators, refer to page 12 or page 21.
4. Close-off Pressure
Confirm in Table-4, Table-5, Table-6, or Table-7 that the selected actuator and valve body combination provides sufficient
close-off pressure. If no close-off pressure is shown, the valve body/actuator combination is not valid.
5. Available Space
If available space is a consideration, check the appropriate dimensional figure (Figure-1 through Figure-10) and its accom-
panying table for any potential fit problems.
Features Benefits
Close-offs of 40 to 100 psi. Accommodates most close-off requirements.
Available in full range of line sizes, 1 in. to 3 in. for
2-way valves and 1 in. to 2 in. for 3-way valves.
Satisfies a wide range of applications.
Cv’s from 0.40 to 266. Permits optimal valve sizing, minimizing the need for pipe reducers.
Flow characterizing insert, made of glass-filled
Noryl™.
Provides equal percentage flow characteristic so that the heat output
of the coil is linear with respect to valve position.
Available in both spring return and non-spring return
models.
Allows power loss mode requirement to be met for any given
application.
Utilizes TAC DuraDrive actuators with two-position,
floating, and proportional control.
Models to fit a wide range of applications.
All models equipped with pigtail leads. Eases installation. Reduced electrician costs.
Low-friction seals and o-rings. Allows the use of lower-torque actuators, reducing cost.
Valve body made of forged brass ASTM B283. Rated for static pressure of 360 psi at fluid temperatures of 20 to
250 °F (-7 to 121 °C).
ANSI Class IV (0.01% of Cv) shutoff with 2-way valves. Allows accurate control, saves energy.
Choices of spring return direction. Provides Normally Closed or Normally Open spring return.
Thermally isolated mounting plate. Protects the actuator from excess cold or heat from chilled or hot
water passing through the valve. Discourages condensation.
Ball Valve Body/Linkage Assemblies are available
separately. They include anti-rotation clips for TAC
DuraDrive actuators.
Increases flexibility and minimizes inventory.