User Guide

ManualsBrandsBarber Colman ManualsHVAC Replacement PartsLinkage Kit for 1/2" to 2" VB7 and 1/2" to 1-1/4" VB9

Application

The AV-390 through AV-396 linkages are used to field

assemble TAC gear train actuators to VB-7XXX series

or VB-9XXX series valve bodies.

• AV-391 and AV-393 are used with current 1/2" to 2"

VB-7X1X and obsolete 1/2" to 1-1/4" VB-9X1X

valve bodies.

• AV-392 and AV-394 are used with obsolete

1-1/2" and 2" VB-9X1X valve bodies.

• AV-395 and AV-396 are used with current 2-1/2" to

4" VB-9X1X valve bodies.

Features

• Die cast aluminum mounting bracket.

• Valve position indication provided as standard.

Applicable Literature

• TAC Environmental Controls Cross-Reference

Guide, F-23638

• TAC Environmental Controls Reference Manual,

F-21683

• TAC Environmental Controls Application Manual,

F-21335

• TAC Pneumatic Products Catalog, F-27383

• EN-205 Water System Guidelines, F-26080

AV-390

Valve Linkage for

Gear Train Actuators

General Instructions

Summary of content (12 pages)

PAGE 1
AV-390 Valve Linkage for Gear Train Actuators General Instructions Application The AV-390 through AV-396 linkages are used to field assemble TAC gear train actuators to VB-7XXX series or VB-9XXX series valve bodies. • AV-391 and AV-393 are used with current 1/2" to 2" VB-7X1X and obsolete 1/2" to 1-1/4" VB-9X1X valve bodies. • AV-392 and AV-394 are used with obsolete 1-1/2" and 2" VB-9X1X valve bodies. • AV-395 and AV-396 are used with current 2-1/2" to 4" VB-9X1X valve bodies.
PAGE 2
SPECIFICATIONS Table-1 Model Chart. Valve Linkage Model Number Description Stem Force (lb.) AV-390 Cam, Plunger, and Stem Extension Kit Req. AV-91, AV-92, AV-93, AV-94 — AV-391 150 AV-392 AV-393 Complete Linkages AV-394 300 AV-395 150 AV-396 300 Temperature Restrictions Verify that the fluid temperature of the media in the valve versus the ambient temperature at the actuator does not exceed the ratings shown in Table-1. Table-2 Restrictions on Maximum Ambient Temperature for Actuators.
PAGE 3
Table-3 Linkage Selection and Valve Close-Off Pressure Ratings for VB-7XXX and VB-9X1X Valve Bodies.
PAGE 4
Table-4 Linkage Selection and Valve Close-off Pressure Ratings for Obsolete VB-9XXX Valve Bodies.
PAGE 5
ASSEMBLY PROCEDURE The following bold italic headings are instructions for step one. Select the specific AV-3XX instructions for the proper valve size. After the mounting bracket is attached, proceed to step 2. See page 8. Note: Position the bracket on the valve in such a way as to make it convenient to wire the actuator. AV-391 or AV-393 Valve Linkage for 1/2" to 2" VB-7XXX and Obsolete 1/2" to 1-1/4" VB-9XXX Valve Bodies 1.
PAGE 6
AV-392 or AV-394 Valve Linkage for Obsolete 1-1/2" to 2" VB-9XXX Valve Bodies 1. Mount the bracket onto the valve body as follows: a. For Style A VB-9XXX valve bodies, mount the bracket on the valve body by screwing the mounting nut into the mounting bracket. Tighten the hex mounting nut, using a 1-5/8" open-ended wrench with a maximum thickness of 3/16" (TOOL-37). See Figure-1. b.
PAGE 7
AV-395 or AV-396 on Current 2-1/2" to 4" VB-9X1X Valve Bodies 1. Mount the bracket onto the valve body by removing the bracket nut, placing the bracket on the valve body, and replacing and tightening the valve bracket nut. See Figure-3. Figure-3 Valve Linkages for Current 2-1/2" to 4" VB-9X1X Valve Bodies. F-24376-8 © Copyright 2008 TAC All Rights Reserved.
PAGE 8
AV-395 or AV-396 on Obsolete 2-1/2" to 4" VB-9X13 Valve Bodies See Figure-4 and YBA-651-1 & YBA-652, Valve Packing Kits General Instructions, F-24185 for details. Caution: Before the packing nut is removed, the system pressure on the valve must be reduced to zero (0) psig. If the packing nut is removed while there is pressure on the valve, the packing can blow out of the valve. 1. Mount the bracket onto the valve body as follows: a. Remove the packing nut and the bracket nut. b.
PAGE 9
Table-5 Actuator Shaft and Cam Position. Actuator Shaft Position Standard Factory Positions of Cam except for Normally Closed Valves w/MA-3XX and MA-4XX Actuators Optional Cam Position Used to Reverse Control Action (Standard for Normally Closed Valves w/MA-3XX and MA-4XX) Cam Up CW Short tooth on actuator shaft at 9:00 Cam Down Cam Up CCW Short tooth on actuator shaft at 3:00 Cam Down 6. Place the plunger cam in the plunger and slip the plunger cam onto the actuator shaft with the cam pointing down.
PAGE 10
CHECKOUT 1. Drive the actuator so that the valve stem is fully up. If the valve is a three-way, check for plunger compression. See Figure-6. 2. Drive the actuator so that the valve stem is fully down. Check for plunger compression. See Figure-7. Note: Check the plunger spring compression, refer to Figure-6 and Figure-7. The length of the stem extension should be adjusted so that the valve disc seats before the actuator reaches the end of the closing stroke.
PAGE 11
MAINTENANCE Regular maintenance of the total system is recommended to assure sustained optimum performance. DIMENSIONAL DATA Figure-8 Dimensions of AV-391, AV-392, AV-393, AV-394, AV-395, and AV-396. F-24376-8 © Copyright 2008 TAC All Rights Reserved.
PAGE 12
Copyright 2008, TAC All brand names, trademarks and registered trademarks are the property of their respective owners. Information contained within this document is subject to change without notice. F-24376-8 TAC 1354 Clifford Avenue P.O. Box 2940 Loves Park, IL 61132-2940 www.tac.