Schneider Electric AV-497 Installation Instructions

Application

The AV-497 valve linkage kit is used to field assemble MK-6811 actuators onto 2-1/2” to 5” VB-8xxx series valves and MK-6911 actuators onto 6” VB-8xxx series valves.

Features

• Die cast aluminum mounting bracket.

• Valve position indication provided as standard.

AV-497

Valve Linkage for MK-6811 and MK-6911

General Instructions

Applicable Literature

F-Number Description Audience Purpose

Provides a comprehensive listing of Schneider Electric component

F-27383 Pneumatic Products Catalog

F-27199 Vx-8xxx Series Selection Guide

F-27193 VB-8213 Flanged Valves General Instructions Describes the valve’s features,

F-27194 VB-8223 Flanged Valves General Instructions

F-27197 VB-8303 Flanged Valves General Instructions

F-13985

F-22909 AK-42309-500 Positive Positioner General Instructions

F-26080 EN-205 Water System Guidelines

MK-6600 Series, MK-6800 Series, MK-6911 Pneumatic Actuators General Instructions

– Sales Personnel – Application Engineers – Installers – Service Personnel – Start-up Technicians

– Application Engineers – Installers – Service Personnel – Start-up Technicians

products, describing their features and specifications, and provides other reference material useful to their selection.

Provides features, specifications, mounting dimensions, and other criteria useful to the selection of Vx-8xxx series valves.

specifications, and possible applications. Provides step-by-step mounting instructions.

Describes the actuator’s features and applications. Provides step-by-step mounting instructions.

Describes the positioner’s features, specifications, and possible applications. Provides step-by-step mounting and adjustment instructions.

Provides treatment guidelines for water and steam systems.

SPECIFICATIONS

Refer to the VX-8XXX Selection Guide, F-27199, for information on close-off pressures, temperature restrictions (ambient and fluid), and valve assembly dimensions.

Table-1 AV-497 Valve Linkage Component Selection.

Valve

Valve Body

VB-8213-0-5-12 VB-8223-0-5-12 VB-8303-0-5-12

VB-8213-0-5-13 VB-8223-0-5-13 VB-8303-0-5-13

VB-8213-0-5-14 VB-8223-0-5-14 VB-8303-0-5-14

VB-8213-0-5-15 VB-8223-0-5-15 VB-8303-0-5-15

VB-8213-0-5-16 VB-8223-0-5-16 VB-8303-0-5-16

a

AK-42309-500 positive positioner optional.

b

AK-42309-500 positive positioner required.

Actuator

Size

2-1/2”

3”

MK-6811

4”

5”

6” MK-6911

Lock Nut

a

b

Stem

(1) 1/2”

Spacers

Not Used

(2)

Mounting

Bracket

(1)

Mounting

Bracket

Bolts

(2)

1-1/4”

Long

(2)

2-1/4”

Long

Connector

(1)

Indicating

Plate

(1) with

1/2” Hole

Stem

Extension

(1)

Scale

Length

1”

(25 mm)

2”

(51 mm)

INSTALLATION Inspection Inspect the carton for possible damage. If damaged, notify the appropriate carrier

immediately. If undamaged, open the carton and inspect the kit for obvious damage. Return any damaged products.

Requirements • Tools (not provided):

– Appropriate wrenches for stem extension, mounting bolts, and lock nuts.

• A source of pressurized air, suitable for applying air pressure to the actuator and

sufficient to fully stroke the piston.

• Training: Installer must be a qualified, experienced technician.

Location Caution:

• Avoid locations where excessive moisture, corrosive fumes, or vibration are present.

• Install all two-way valves so that they close against the flow. An arrow on the valve

indicates the proper direction of flow. Flow is from port A (inlet) to port AB (outlet).

• VB-8303 may be piped as a mixing valve (two inlets and one outlet) or a diverting valve

(one inlet and two outlets). Flow is from ports A and B to AB (mixing) and from AB to A and B (diverting).

• Do not install the actuator below the center line of the valve. For steam applications,

mount the actuator on the valve body at 45 from vertical.

Mounting Two-Way Normally Open 2-1/2” to 5” VB-8213 Valves

OPEN

CLOSED

OPEN

CLOSED

Connecting Pin

Indicator Plate

OPEN/CLOSED Decal

(Short)

Valve Body *

Mounting Bolt (2)

(1-1/4 long)

Bracket Nut *

Stem Locknut

Stem Extension

Actuator Piston Stem *

Mounting Bracket

Internal Packing Nut * (Do not remove when installing the linkage.)

Shown with AK-42309-500 Positive Positioner

* Not included with AV-497

Linkage Kit

MK-6811 and AV-497

Assembled on

VB-8213 or VB-8303

(VB-8303 shown)

Figure-1 Valve Linkage Assembly for MK-6811 Actuator on 5” VB-8213 or VB-8303 Valve.

Refer to Figure-1.

1. Th e actuator should be in its fully retracted position (no air pressure).

2. Push the valve stem completely down so that the valve disc is seated against the valve seat.

3. Moun t the bracket on the valve body by removing the bracket nut, placing the bracket on the valve body, orienting the bracket in a convenient position for piping, and then replacing and tightening the bracket nut.

4. Thread the 1/2” stem lock nut well down onto the valve stem. Next, place the indicator plate (and the AK-42309-500 spring arm if positive positioner being used) on the valve stem. Finally, thread the stem extension well down onto the valve stem. Consult the AK-42309-500 Positive Positioner General Instructions, F-22909 for information on mounting and calibrating the AK-42309-500 positive positioner.

5. Moun t the MK-6811 actuator to the mounting bracket, using the two 1-1/4” long bolts provided.

6. Link the actuator to the valve stem extension as follows: a. Apply air pressure to the actuator until it fully strokes (piston extended). b. Turn the stem extension until the hole in the stem extension lines up with the hole

in the actuator piston. c. Turn the stem extension two full turns up, toward the actuator piston. d. Decrease air pressure in the actuator until the hole in the stem extension and the

hole in the actuator piston are aligned, and then insert the connecting pin.

7. Tighten the stem lock nut against the stem extension and indicator plate.

T wo-Way Normally Closed VB-8223 V alves and Three-W ay VB- 8303 2-1/2” to

OPEN

CLOSED

OPEN

CLOSED

Connecting Pin

Indicator Plate

OPEN/CLOSED Decal

(Short)

Valve Body *

Mounting Bolt (2)

(1-1/4 long)

Bracket Nut *

Stem Locknut

Stem Extension

Actuator Piston Stem *

Mounting Bracket

Internal Packing Nut * (Do not remove when installing the linkage.)

Flow

Shown with AK-42309-500 Positive Positioner

* Not included with AV-497

Linkage Kit

MK-6811 and AV-497

Assembled on VB-8223

Figure-2 Valve Linkage Assembly for MK-6811 Actuator on 2-1/2” to 5” VB-8223 Valve.

5” Valves

Refer to Figure-1 for VB-8303 valves and Figure-2 for VB-8223 valves.

1. Th e actuator should be in its fully retracted position (no air pressure).

2. Pull the valve stem completely up so that the valve disc is seated against the upper valve seat.

3. Moun t the bracket on the valve body by removing the bracket nut, placing the bracket on the valve body, orienting the bracket in a convenient position for piping, and then replacing and tightening the bracket nut.

4. Thread the 1/2” stem lock nut well down onto the valve stem. Next, place the indicator plate (and the AK-42309-500 spring arm if positive positioner being used) on the valve stem. Finally, thread the stem extension well down onto the valve stem. Consult the AK-42309-500 Positive Positioner General Instructions, F-22909 for information on mounting and calibrating the AK-42309-500 positive positioner.

5. Moun t the MK-6811 actuator to the mounting bracket using the two 1-1/4” long bolts provided.

6. Lin k the actuator to th e valve ste m extensi on as follows: a. Make sure the valve stem is still in the completely up position. b. Turn the stem extension until the hole in the stem extension lines up with the hole

in the actuator piston. c. Turn the stem extension two full turns down, away from the actuator piston. d. Push the valve stem down. e. Apply air pressure to the actuator until the hole in the stem extension and the hole

in the actuator piston are aligned, and then insert the connecting pin.

7. Ti ghten the stem lock nut ag ainst the stem extension and indicator plate.

Two-Way Normally Open 6” VB-8213 Valves

OPEN

CLOSED

OPEN

CLOSED

Connecting Pin

Indicator Plate

OPEN/CLOSED Decal

(Long)

Valve Body *

Mounting Bolt (2)

(2-1/4 long)

Bracket Nut *

Stem Locknut

Stem Extension

Actuator Piston Stem *

Mounting Bracket

Internal Packing Nut * (Do not remove when installing the linkage.)

Spacers (2)

Shown with AK-42309-500 Positive Positioner

MK-6911 and AV-497

Assembled on

VB-8213 or VB-8303

(VB-8303 shown)

* Not included with AV-497

Linkage Kit

Figure-3 Valve Linkage Assembly for MK-6911 Actuator on 6” VB-8213 or VB-8303 Valve.

Refer to Figure-3.

1. Th e actuator should be in its fully retracted position (no air pressure).

2. Pull the valve stem completely up.

3. Moun t the bracket on the valve body by removing the bracket nut, placing the bracket on the valve body, orienting the bracket in a convenient position for piping, and then replacing and tightening the bracket nut.

4. Thread the 1/2” stem lock nut well down onto the valve stem. Next, place the indicator plate (and the AK-42309-500 spring arm if positive positioner being used) on the valve stem. Finally, thread the stem extension well down onto the valve stem. Consult the AK-42309-500 Positive Positioner General Instructions, F-22909 for information on mounting and calibrating the AK-42309-500 positive positioner.

5. Mount the MK-6911 actuator to the mounting bracket, placing the two spacers between the actuator and the bracket. Secure the actuator to the bracket, using the two 2-1/4” long bolts provided.

6. Link the actuator to the valve stem extension as follows: a. Turn the stem extension until the hole in the stem extension lines up with the hole

in the actuator piston. b. Push the valve stem down. c. Apply air pressure to the actuator until the hole in the stem extension and the hole

in the actuator piston are aligned, and then insert the connecting pin.

7. Ti ghten the stem lock nut against the stem extension and indicator plate.

Two-Way Normally Closed 6” VB-8223 Valves and Three-Way 6” VB-8303

OPEN

CLOSED

OPEN

CLOSED

Connecting Pin

Indicator Plate

OPEN/CLOSED Decal

(Long)

Valve Body *

Mounting Bolt (2)

(2-1/4 long)

Bracket Nut *

Stem Locknut

Stem Extension

Actuator Piston Stem *

Mounting Bracket

Internal Packing Nut * (Do not remove when installing the linkage.)

Flow

Spacers (2)

Shown with AK-42309-500 Positive Positioner

MK-6911 and AV-497

Assembled on VB-8223

* Not included with AV-497

Linkage Kit

Figure-4 Valve Linkage Assembly for MK-6911 Actuator on 6” VB-8223 Valve.

Valves

Refer to Figure-3 for VB-8303 valves and Figure-4 for VB-8223 valves.