User Guide

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trademarks are the property of their respective

owners. Information contained within this

document is subject to change without notice.

F-24392-2

www.tac.com

TAC

1354 Clifford Avenue

P.O. Box 2940

Loves Park, IL 61132-2940

Durability of valve stems and packings is dependent on maintaining non-damaging water

conditions. Inadequate water treatment or filtration, not in accordance with chemical

supplier/ASHRAE handbook recommendations, can result in corrosion, scale, and abrasive

particle formation. Scale and particulates can result in stem and packing scratches and can

adversely affect packing life and other parts of the hydronic system.

To maintain non-damaging conditions, follow these guidelines:

• Clean the system prior to start up. Use a nitrite or molybdate-based treatment program.

• Use filtration equipment where needed.

• Properly store off-line systems and monitor water treatment results using corrosion test

coupons.

• Follow the advice of a water treatment professional.

• Consult EN-205, Water System Guidelines Engineering Information, F-26080, for

further details.

DIMENSIONAL DATA

Table-7 Dimensions for VB-7312 Series Valves (Figure-6).

Figure-6 Dimensions for VB-7312 Series Valve Bodies.

Valve Body

Part Number

Valve

Size

Dimensions in Inches (mm)

ABC

(Stem Down)

(Stroke)

VB-7312-0-4-2

VB-7312-0-4-4

5/8"

O.D.

(102)

2-1/4

(57)

1-11/16

(43)

3/4

(19)

7/16

(11)