T.A.C. AV-496 User Guide

Page 1

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

AV-496

Valve Linkage for MK-88XX

and MK-89XX Actuators

General Instructions

• Die cast aluminum mounting bracket.

• Valve position indication provided as standard.

Applicable Literature

• TAC Cross-Reference Guide, F-23638

• TAC Reference Manual,

F-21683

• TAC Application Manual,

F-21335

• TAC Pneumatic Products Catalog, F-27383

• AK-42309-500 Positive Positioner Pneumatic Relay

General Instructions, F-22909

• EN-205 Water System Guidelines, F-26080

LOSED

PEN

OPEN

Page 2

SPECIFICATIONS

Table-1 AV-496 Valve Linkage Component Selection.

Valve Body

2-1/2 to 4”

VB-9XXX

5 & 6”

VB-9XXX

Except VB-9323 series valves.

Actuator Lock Nut Spacers Stem Adapters

MK-88XX 1/2” —

MK-89XX 1/2” 2

2 for

1/2” stem

2 for

1/2” stem

Stem

Link

Shaft

E-rings

Mounting

Bracket Bolts

1-1/4” long

2-1/4” long

Indicating

Plate

1 with

1/2” hole

1 with

1/2” hole

Scale

Length

1”

(25.4mm)

2”

(50.8mm)

INSTALLATION Inspection Inspect the pack age for damage. If damaged, noti fy the appropriate carrier immediately . If

undamaged, open the package and inspect the device for obvious damage. Retu rn any damaged products.

Requirements • Tools:

– Open end wrench, 3/4 inch – Slotted screw driver – Scale for measurin g the gap between valve stem and actuator shaft

• Training: Installer must be a qualifi ed, experienced technician

Caution:

• Avoid locations where excessive moisture, corrosive fum es, or vibration is present.

• Install all two-way valves so that t hey close agai nst the f low. An arrow on the valve bo dy

or a tag indicates the proper flow directi on.

• 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 vert ical.

Page 3

Linkage Kit Installation

Two-way Normally Open VB-9213 2½ ” throu gh 6” Valve Bodies

Warning:

nut removed and repla ced [replace packing nut — tighten four (4) turns] along with the bracket nut. Before removing packing nut, isolate the valve body using shutoff valves or depressuriz e syst em to zero gau ge an d dr ain pi ping. System p ress ure cou ld cause pac ki ng 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 br acket nut.

4. Thread the stem lock nut all the way down the valve stem.

5. Place the indic ator plate on the valve stem .

6. Install an E-ring on one end of stem link shaft (pin). Insert the pin th rough the holes of

7. Thread t he val ve ste m adap ter on to the v alv e stem unt il the st em t ouches t he pin. Back

8. Secure the valve st em adapter, the AK-42309-500 spring arm (if requir ed), and the

Note:

AK-42309-500, Positive Positioner Pneumatic Relay General Instructions, F-22909, for details.

2½” through 6” valve bodies date coded before 8603 must have valve packing

the valve stem adapt er.

the adapter off ½ turn (counterclockwise) and remove the pin.

indicator plate into place with the ste m lock nut. Refer to Figure-1.

For actuator/valve assemblies that require a positive positioner, refer to

9. Select the actuator (MK-88XX or MK-89XX series). For actuators details refer to

MK-8800 Series, MK-8900 Series, Pneumatic Valve Act uators General Instructio ns, F-21662.

10. Thread actuator shaft adapter onto the actuator shaft as far as it will turn. Refer to Table-1 for requir ed AV-496 components.

11. Usi ng the ap pro priat e bolts attach the sel ected act uat or to t he mounti ng bracke t. Refer to Table-1. If MK-89XX ser ies actuator i s selected, install the spacers before attaching the actuator to the bracket. Refer to Figure-1.

12. Turn actuator shaft adapter (countercl ockwise) until the distance between the surface of the two adapte rs is 1. 100” (f or 5” and 6” valves with 2” s troke) or 0.100 ” (for 2-1/2” to 4” valves with 1” str oke). Use a scale or caliper to measure the distance.

13. Raise the valve stem to sl ide the valve stem adapter i nto 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-r ing on the other end to secure the assembly.

16. Al ign t he top in dication mark er of the OPEN/CLOSE decal wit h the i ndicat or pl ate. Affi x the OPEN/CLOSE decal to the mount ing bracket. Refer to Figure-1.

17. Li nkage assembly is compl ete. Refer to Figure-2 and Figure-3.

Page 4

Spacer (2) for MK-89XX Series Actuators Only

Vertical View of Actuator Shaft Adapter

Actuator Piston* Stem

Valve Stem Adaptor

Indicator Plate

Mounting Bolt (2) for MK-8900 Series

Stem Lock Nut

Mounting Bracket

Actuator Shaft Adapter

E-Ring (2)

Stem Link Shaft

Mounting Bolt (2) for MK-8800 Series

OPEN

CLOSED

*Packing Nut

*Bracket Nut

*Valve Body

OPEN CLOSED Decal

*Not Included with AV-496.

Figure-1 AV-496 Valve Linkage Ki t Components.

Page 5

Linkage Kit Installation (Continued)

Two-way Normally Closed VB-9223 2½” thro ugh 6” and Three-way Mixing VB-9313 2½” through 6” Valves Bo dies

Warning:

1. Push the stem completely down.

2. Remove the bracket nut from valve body. Refer to Figure-1.

3. Place the m ounting bracket onto the v alve body and secure it in place with the bracket

4. Thread the stem lock nut all the way down the valve stem.

5. Place the indic ator plate on the valve stem .

6. Install an E- ri ng on one end of the stem link shaft (pin). Insert the pin t hrough the hole

7. Thread t he val ve ste m adap ter on to the v alv e stem unt il the st em touch es t he pin. Back

8. Secure the valve st em adapter, the AK-42309-500 spring arm (if requir ed), and the

Note:

AK-42309-500, Positive Positioner Pneumatic Relay General Instructions, F-22909, for details.

2½” through 6” valve bodies date coded before 8603 must have valve packing

nut.

on the valve stem adapt er.

the adapter off ½ turn (counterclockwise) and remove the pin.

indicator plate into place with the ste m lock nut. Refer to Figure-1.

For actuator/valve assemblies that require a positive positioner, refer to

9. Select the actuator (MK-88XX or MK-89XX series). For actuators details refer to

MK-8800 Series, MK-8900 Series, Pneumatic Valve Act uators General Instructio ns, F-21662.

10. Thread the actuator shaft adapter onto the actuator stem as far as it will turn. Refer to Table-1 for requir ed AV-496 components.

11. Usi ng the ap pro priat e bolts attach the sel ected act uat or to t he mounti ng bracke t. Refer to Table-1. If MK-89XX series actuator is selected install the spacers before attac hing 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 shaf t adapter countercl ockwise until the holes on the adapters are aligned.

14. Screw the actuator shaf t adapter 1½ turns furth er cl ockwise 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-r ing on the other end to secure the assembly.

17. Release pressure to act uator and allow valve assembl y to spring return to the cl osed position.

18. Al ign t he top in dication mark er of the OPEN/CLOSE decal wit h the i ndicat or pl ate. Affi x the OPEN/CLOSE decal to the mount ing bracket. Refer to Figure-1.

19. Li nkage assembly is compl ete. Refer to Figure-2 and Figure-3.

MAINTENANCE 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.

Page 6

Figure-2 MK-8800 Series Actuator Valve Assembly.

Figure-3 MK-8900 Series Actuator Valve Assembly.

Page 7

Page 8

F-21663-4

TAC

1354 Clifford Avenue P.O. Box 2940 Loves Park, IL 61132-2940

www.tac.com