Schneider Electric AV-495 Data Sheet

APPLICATION

The AV-495 linkage is used to field install MK-68X1series of actuators 2-1/2" to 4" VB-9213, VB-9223 and VB-9313 Schneider Electric valve bodies. Table-1 provides a list of actuators and valves compatible with AV-495 and details resulting close-off pressure.

PRE-INSTALLATION

Inspection

Visually inspect the package for damage. If damaged, notify the appropriate carrier immediately. If undamaged, open the package and visually inspect the device for obvious defects. Return damaged or defective products.

AV-495

Valve Linkage

General Instructions

Required Installation Items

Tools (not provided):

• Appropriate wrenches for stem extensions, lock nuts and

mounting bolts.

Table-1 Restrictions on Maximum Ambient Temperature

For The Valve Actuator.

Max. Temperature in °F (°C)

of Media in the Valve Body

(Check Ratings of the Valve)

281 (138) 160 (71)

250 (121) 220 (104)

Max. Ambient Temperature in

°F (°C) of MK-6801, MK-6811

or MK-6821

INSTALLATION

Consult Table-1 to make sure the valve selected is compatible with AV-495 valve linkage and the actuator. Verify that the close-off pressure shown in Table-1 is adequate for the application. Verify that fluid temperature of the media in the valve versus the ambient temperature at the actuator do not exceed the ratings shown in Table-2.

Caution:

• Installer must be a qualified, experienced technician

• 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 body or a tag indicates the proper flow direction.

• Always install three-way mixing valves with two inlets and

one outlet.

• The actuators can be mounted in any position above the

centerline of the valve body. When selecting a location, allow sufficient room for accessories and for service of the product.

Table-2 Actuators and Valve Bodies That are Compatible with AV-495 and Resulting Close-off Pressure.

MK-6801 MK-6811 MK-6821

Valve Body Information

Close-Off Pressure (psi)

Supply Air Pressure (psig)

Valve Body Part

Number

Description

VB-9213-0-4-12 2-Way

VB-9213-0-4-13 Open 85 3 - 41 75 - 27 62 - 5 41

250 psi Globe

Screwed

VB-9213-0-5-12

VB-9213-0-5-13 Open 85 3 - 41 75 - 27 62 - 5 41

2-Way

125 lb. Flanged

Normal

Position

(Stem Up)

Size

(in.)

Open 65 2-1/2 - 60 110 - 40 91 - 9 60

Open 56 2-1/2 - 60 110 - 40 91 - 9 60

15 20 15 20 15 20

VB-9213-0-5-14 Open 145 4 - 22 41 - 14 33 - 2 22

VB-9223-0-4-12 2-Way

VB-9223-0-4-13 Closed 85 3 5 - - 19 - - 41 - -

250 psi Globe

Screwed

VB-9223-0-5-12

VB-9223-0-5-13 Closed 85 3 5 - - 19 - - 41 - -

2-Way

125 lb. Flanged

Closed 65 2-1/2 9 - - 30 - - 60 - -

Closed 56 2-1/2 9 - - 30 - - 60 - -

VB-9223-0-5-14 Closed 145 4 2 - - 10 - - 22 - -

VB-9313-0-4-12

3-Way Mixing

250 psi Globe

VB-9313-0-4-13

Screwed

VB-9313-0-5-12

VB-9313-0-5-13

3-Way Mixing

125 lb. Flanged

VB-9313-0-5-14

Close-off pressure for 3-way valves: SU is “A” port close-off and is based on pressure at “A” port minus pressure at “B” port. SD is “B” port close -off and is based on pressure at “B” port minus pressure at “A” port. SU = Stem up position of valve. SD = Stem down position of valve.

Flow B to

67 2-1/2 9 60 110 30 40 91 60 9 60

91 3 5 41 75 19 27 62 41 5 41

74 2-1/2 9 60 110 30 40 91 60 9 60

101 3 5 41 75 19 27 62 41 5 41

170 4 2 22 41 10 14 33 22 2 22

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