AV-496
Valve Linkage for MK-88XX and MK-89XX Actuators
General Instructions
Application
The AV-496 valve linkage kit is used to field assemble
MK-88XX and MK-89XX series actuators to 2½ inch through 6 inch VB-9XXX series valve bodies, except
VB-9323.
Features
•
Die cast aluminum mounting bracket.
•
Valve position indication provided as standard.
Applicable Literature
•
Cross-Reference Guide, F-23638
•
Reference Manual, F-21683
•
Application Manual,F-21335
•
Pneumatic Products Catalog, F-27383
•
AK-42309-500 Positive Positioner Pneumatic Relay
General Instructions, F-22909
•
EN-205 Water System Guidelines, F-26080
CLOSED
CLOSED
OPEN
OPEN
Printed in U.S.A. 6-10
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Copyright 2010 Schneider Electric All Rights Reserved.
F-21663-5
SPECIFICATIONS
Table-1 AV-496 Valve Linkage Component Selection.
Valve Body a
Actuator Lock Nut Spacers Stem Adapters
2-1/2 to 4”
VB-9XXX
5 & 6”
VB-9XXX
MK-88XX
MK-89XX a
Except VB-9323 series valves.
1/2”
1/2”
—
2
2 for
1/2” stem
2 for
1/2” stem
Stem
Link
Shaft
1
E-rings
2
1 2
Mounting
Bracket Bolts
2
1-1/4” long
2
2-1/4” long
INSTALLATION
Inspection
Requirements
Indicating
Plate
1 with
1/2” hole
1 with
1/2” hole
Scale
Length
1”
(25.4mm)
2”
(50.8mm)
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:
– Open end wrench, 3/4 inch
– Slotted screw driver
– Scale for measuring the gap between valve stem and actuator shaft
•
Training: Installer must be a qualified, experienced technician
Caution:
• Avoid locations where excessive moisture, corrosive fumes, or vibration is present.
• 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.
•
Do not install the actuator below the center line of the valve. For steam applications mount the actuator above the valve body at 45° from vertical.
2
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Copyright 2010 Schneider Electric All Rights Reserved.
F-21663-5
Linkage Kit
Installation
Two-way Normally Open VB-9213 2½” through 6” Valve Bodies
Warning: 2½” through 6” valve bodies date coded before 8603 must have valve packing nut removed and replaced [replace packing nut — tighten four (4) turns] along with the bracket nut. Before removing packing nut, isolate the valve body using shutoff valves or depressurize system to zero gauge and drain piping. System pressure could cause packing parts to blow out with potential of bodily injury and/or water damage.
1. Push the valve stem completely down.
2. Remove bracket nut from valve body. Refer to Figure-1.
3. Place mounting bracket onto valve body and secure it in place with the bracket nut.
4. Thread the stem lock nut all the way down the valve stem.
5. Place the indicator plate on the valve stem.
6. Install an E-ring on one end of stem link shaft (pin). Insert the pin through the holes of the valve stem adapter.
7. Thread the valve stem adapter onto the valve stem until the stem touches the pin. Back the adapter off ½ turn (counterclockwise) and remove the pin.
8. Secure the valve stem adapter, the AK-42309-500 spring arm (if required), and the
indicator plate into place with the stem lock nut. Refer to Figure-1.
Note: For actuator/valve assemblies that require a positive positioner, refer to
AK-42309-500, Positive Positioner Pneumatic Relay General Instructions, F-22909 , for details.
9. Select the actuator (MK-88XX or MK-89XX series). For actuators details refer to
MK-8800 Series, MK-8900 Series, Pneumatic Valve Actuators General
Instructions, F-21662 .
10. Thread actuator shaft adapter onto the actuator shaft as far as it will turn. Refer to
Table-1 for required AV-496 components.
11. Using the appropriate bolts attach the selected actuator to the mounting bracket. Refer
to Table-1. If MK-89XX series actuator is selected, install the spacers before attaching
the actuator to the bracket. Refer to Figure-1.
12. Turn actuator shaft adapter (counterclockwise) until the distance between the surface of the two adapters is 1.100” (for 5” and 6” valves with 2” stroke) or 0.100” (for 2-1/2” to
4” valves with 1” stroke). Use a scale or caliper to measure the distance.
13. Raise the valve stem to slide the valve stem adapter into the actuator shaft adapter.
14. Align the holes on both sides of the adapter assembly.
15. Insert the stem link shaft (pin) through the holes and place the second E-ring on the other end to secure the assembly.
16. Align the top indication marker of the OPEN/CLOSE decal with the indicator plate. Affix
the OPEN/CLOSE decal to the mounting bracket. Refer to Figure-1.
17. Linkage assembly is complete. Refer to Figure-2 and Figure-3.
F-21663-5
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Copyright 2010 Schneider Electric All Rights Reserved.
3
Vertical View of
Actuator Shaft Adapter
Spacer (2) for
MK-89XX Series
Actuators Only
Valve
Stem
Adaptor
Indicator
Plate
Mounting Bolt (2) for MK-8900 Series
Stem
Lock Nut
Mounting
Bracket
*Not Included with AV-496.
Actuator Shaft
Adapter
Actuator Piston*
Stem
E-Ring (2)
Stem Link Shaft
Mounting Bolt (2) for MK-8800 Series
OPEN
OPEN
CLOSED
Decal
CLOSED
*Packing Nut
*Bracket Nut
*Valve Body
Figure-1 AV-496 Valve Linkage Kit Components.
4
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Copyright 2010 Schneider Electric All Rights Reserved.
F-21663-5
Linkage Kit
Installation
(Continued)
MAINTENANCE
Two-way Normally Closed VB-9223 2½” through 6” and
Three-way Mixing VB-9313 2½” through 6” Valves Bodies
Warning: 2½” through 6” valve bodies date coded before 8603 must have valve packing nut removed and replaced [replace packing nut — tighten four (4) turns] along with the bracket nut. Before removing packing nut, isolate the valve body using shutoff valves or depressurize system to zero gauge and drain piping. System pressure could cause packing parts to blow out with potential of bodily injury and/or water damage.
1. Push the stem completely down.
2. Remove the bracket nut from valve body. Refer to Figure-1.
3. Place the mounting bracket onto the valve body and secure it in place with the bracket nut.
4. Thread the stem lock nut all the way down the valve stem.
5. Place the indicator plate on the valve stem.
6. Install an E-ring on one end of the stem link shaft (pin). Insert the pin through the hole on the valve stem adapter.
7. Thread the valve stem adapter onto the valve stem until the stem touches the pin. Back the adapter off ½ turn (counterclockwise) and remove the pin.
8. Secure the valve stem adapter, the AK-42309-500 spring arm (if required), and the
indicator plate into place with the stem lock nut. Refer to Figure-1.
Note: For actuator/valve assemblies that require a positive positioner, refer to
AK-42309-500, Positive Positioner Pneumatic Relay General Instructions, F-22909 , for details.
9. Select the actuator (MK-88XX or MK-89XX series). For actuators details refer to
MK-8800 Series, MK-8900 Series, Pneumatic Valve Actuators General
Instructions, F-21662 .
10. Thread the actuator shaft adapter onto the actuator stem as far as it will turn. Refer to
Table-1 for required AV-496 components.
11. Using the appropriate bolts attach the selected actuator to the mounting bracket. Refer
to Table-1. If MK-89XX series actuator is selected install the spacers before attaching
the actuator to the bracket. Refer to Figure-1.
12. Raise the valve stem completely up, so that the disc rest against the top seat.
13. Turn the actuator shaft adapter counterclockwise until the holes on the adapters are aligned.
14. Screw the actuator shaft adapter 1½ turns further clockwise onto the actuator shaft.
15. Apply air pressure to actuator until the holes on the adapters are aligned.
16. Insert the stem link shaft (pin) through the holes and place the second E-ring on the other end to secure the assembly.
17. Release pressure to actuator and allow valve assembly to spring return to the closed position.
18. Align the top indication marker of the OPEN/CLOSE decal with the indicator plate. Affix
the OPEN/CLOSE decal to the mounting bracket. Refer to Figure-1.
19. Linkage assembly is complete. Refer to Figure-2 and Figure-3.
The actuator linkage requires no maintenance. Regular maintenance of the total system is recommended to assure sustained optimum performance. Hard water leaves abrasive deposits and reduces component life. To maximize valve life, consult EN-205 Water System
Guidelines, F-26080.
F-21663-5
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Copyright 2010 Schneider Electric All Rights Reserved.
5
Figure-2 MK-8800 Series Actuator Valve Assembly.
6
Figure-3 MK-8900 Series Actuator Valve Assembly.
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Copyright 2010 Schneider Electric All Rights Reserved.
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Copyright 2010 Schneider Electric All Rights Reserved.
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On October 1st, 2009, TAC became the Buildings business of its parent company Schneider Electric. This document reflects the visual identity of Schneider Electric, however there remains references to TAC as a corporate brand in the body copy. As each document is updated, the body copy will be changed to reflect appropriate corporate brand changes.
Copyright 2010, Schneider Electric
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.
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