Pipeline ancillaries

Air vents and air eliminators

Dimensions/weights (approximate) in mm and kg

Screwed, butt weld and socket weld

Size

A

C

D

E

H

Weight

Spare parts

The spare parts available are shown in solid outline. Parts drawn

in broken line are not supplied as spares.

1⁄2"

130

3⁄4"

130

1"

130

102

138

102

138

102

138

102

146

24

108

5.4

24

108

5.4

24

108

5.4

30

114

6.0

Available spares

Element set

Complete with valve, valve seat

and valve seat gasket

Strainer screen (3 off)

Set of gaskets (packet of 3 of each)

Important note

2, 3, 6

4

6, 10

* 11⁄2"

149

* Butt weld and socket weld only.

The earlier design of the AV45 incorporated 4 off long cover studs

and 8 off washers and nuts for assembling the body and cover.

The current design of the AV45 incorporates a threaded cover and

4 off shorter studs and 4 off washers and nuts.

How to order spares

Always order spares by using the description given in the column

headed 'Available spares' and state the size and type of steam trap.

Example: 1 - Element set for a DN25 Spirax Sarco AV45 air vent.

H Withdrawal

distance

D

E

Flanged

Size

A1

DN15

210

DN20

230

DN25

230

DN40

260

C

A

A1

11

2

2

3

3

5

4

6

6

C

D

102

138

102

138

102

138

102

146

E

H

Weight

24

108

7.2

24

108

8.6

24

108

9.5

30

114

13.6

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions

(IM-P123-13) supplied with the product.

Installation note:

The AV45 is designed for installation with the element in a horizontal

plane with the cover at the top. Positioned at the highest point of the

main, or plant where air collects. For maximum air removal, the

discharge should be as free as possible or piped to a safe location.

When welding the trap into the line there is no need to remove the

element providing the welding is done by the electric arc method. For

ease and maintenance consideration should be given to fitting

isolation valves upstream and downstream of the air vent. The air

vent should not be insulated.

Disposal

The product is recyclable. No ecological hazard is anticipated with

disposal of this product providing care is taken.

How to order

Example: 1 off Spirax Sarco 1⁄2" AV45 air vent having screwed

BSP connections.

10

11

11

Recommended tightening torques

Item

5

11

10

or

mm

27 A/F

19 A/F

M12

N m

120 - 132

110 - 120

TI-P123-03 ST Issue 6

AV45 Air Vent for Steam Systems

Page 3 of 3

7.12.14

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-

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