Schneider Electric AV-400 Installation Instructions
Application
The AV-400 valve linkage kit is used to field assemble
MK-2690 pneumatic actuators to a variety of 1/2"
through 2" valve bodies.
Features
• Springs are provided for all control signal
ap
plications, including 3 to 7, 5 to 10, an
8 to 13 psig.
d
AV - 4 0 0
Pneumatic Actuator Valve Linkage Kit
General Instructions
• Kit fits both current and obsolete TAC
Ba
rber-Colman valve bodies.
Applicable Literature
• Environmental Controls Cross-Reference Guide,
F-23638
• Environmental Controls Reference Manual, F-21683
• Environmental Controls Application Manual,
F-21335
• Pneumatic Products Catalog F-27383
• MK-2690, Pneumatic Valve Actuator General
Instructions, F-13893
• Valve Selection Guide, F-26094
• EN-205 Water System Guidelines, F-26080
Printed in U.S.A. 6-10 Copyright 2010 Schneider Electric All Rights Reserved. F-25585-5
INSTALLATION
C A U T I O N
Inspection
Requirements
Inspect the package for damage. If damaged, notify the appropriate carrier immediately. If
undamaged, open the package and inspect the device for obvious damage. Return any
damaged products.
• Tools (not provided):
Screwdriver appropriate for slotted spring compression screw
Two 3/8" wrenches
TOOL-20-1, Packing and linkage wrench
TOOL-19, Spring compression tool
• Linkage wrench (provided)
• Training:
Installer must be a qualified, experienced technician
• Avoid locations where excessive moisture, corrosive fumes, or vibration are present. Do not
insulate piping above the actuator mounting nut preventing proper drainage.
• Install all two-way valves so that they close against the flow. An arrow on the valve body or
a tag indicates the proper flow direction.
• Always install three-way mixing valves with two inlets and one outlet.
• Always install three-way diverting valves with one inlet and two outlets.
• Do not install the actuator below the center line of the valve. For steam applications mount
the actuators above the valve body at 45° from vertical.
Mounting
1. Actuators can be mounted in any upright position above the centerline of a valve body.
2. When selecting a location, allow sufficient room for accessories and for service of the product.
3. Maintain proper flow direction when installing all globe and radiator-type valves. Flow direction is indicated by an arrow on the valve body or by information on the attached tag.
2 Copyright 2010 Schneider Electric All Rights Reserved. F-25585-5
ASSEMBLY PROCEDURE
C A U T I O N
C A U T I O N
Figure-1 Installation of Hexagon Coupler and Spring Compression Screw onto
Valve Stem.
Spring
Compresion
Screw
Hexagon Coupler
Valve Stem
1/16" Max.
(1.6 mm)
The AV-400 linkage kit contains parts for installation on both current 1/2" to 1-1/4" VB-7xxx
series valve bodies and on obsolete 1/2" to 1-1/4" VB-9xxx and older valve bodies.
AV-400 Valve Linkage Kit Used
with VB-7xxx Series Valves
The AV-400 linkage kit used with the MK-2690 actuator on VB-7xxx series valve bodies
require no stem height setting. Follow the assembly procedure for VB-7xxx series valves on
pages 6 through 8 for the selected valve body. Refer to Environmental Controls Valve
Selection Guide, F-26094, or Environmental Controls Catalog, F-25683, for valves
accommodating the MK-2690 actuator and AV-400 linkage kit.
• It is essential that the proper parts be used for the valve body on which the linkage is being
installed to ensure proper actuator operation and close off.
• Do not attempt to use the square stem extension with VB-7xxx valves. Parts or valves
may be damaged internally.
Linkage Kit Installation
The linkage is assembled onto the VB-7xxx valve body with stem in the up position.
1. Thread the hexagon coupler onto the valve stem all the way to the bottom of the stem thread, finger tight (Figure-1).
The hexagon coupler must reach to within 1/16" (1.6 mm) of the smooth section of the
stem to assure proper seating.
F-25585-5 Copyright 2010 Schneider Electric All Rights Reserved. 3
2. Start the spring compression screw one turn or more into the hexagon coupler. Pull the
Figure-2 Assembly of AV-400 Linkage Kit onto VB-7xxx Series Valve.
Spring retainer
Spring
Hexagon coupler
Mounting nut
Packing nut
Spring
compression
screw
valve stem completely up (Figure-2).
3. Choose the correct spring for the desired actuator operating pressure range:
3 to 7 psig (21 to 48 kPa) Yellow Spring
5 to 10 psig (34 to 68 kPa) Black Spring
8 to 13 psig (55 to 89 kPa) Blue Spring
4. Slip the spring over the coupler and screw.
5. Place the retainer over the screw. Twist the retainer 45° to lock it in place on the spring compression screw.
6. Insert the linkage wrench (supplied with kit, also included on TOOL-20-1) through the spring coils to hold hexagon coupler.
7. Tighten the spring compression screw. To establish proper linkage height, run the
spring compression screw down until the screw end bottoms firmly on the stem top (Figure-3).
• On stem up closed valves (VB-722x) or three-way valves (VB-73xx), you will feel the
screw bottom.
4 Copyright 2010 Schneider Electric All Rights Reserved. F-25585-5
Loading...