Pipeline ancillaries
Air vents and air eliminators
Local regulations may restrict the use of this product to below the conditions quoted.
In the interests of development and improvement of the product, we reserve the right to change the specification without notice.
© Copyright 2015
AV45
Air Vent for Steam Systems
TI-P123-03
ST Issue 6
13
1
2
3
Description
The AV45 is a forged alloy steel, medium pressure,
temperature sensitive, maintainable air vent. The
operating element comprises a stack of bimetal discs
which control the flow of air and other incondensable
gases at a preset temperature below steam saturation.
Standards
This product fully complies with the requirements of the
European Pressure Equipment Directive 97/23/EC and
carries the mark when so required.
Certification
The product is available with certification to EN 10204 3.1.
Note: All certification/inspection requirements must be
stated at the time of order placement.
AV45
Butt weld version
shown illustrating the
valve arrangement
for the 3⁄4" and 1"
sizes.
8
5
4
10
11
Sizes and pipe connections
1⁄2", 3⁄4" and 1"
Screwed BSP or NPT,
1⁄2", 3⁄4", 1" and 11⁄2"
Butt weld to suit Schedule 80 pipe and
Socket weld to BS 3799 Class 3000.
DN15, DN20, DN25 and DN40
Standard flange to:
EN 1092 PN64,
ASME 300 and 9
Pressure/temperature limits (ISO 6552)
JIS/KS 30K.
See page 2.
7 12 6
Valve arrangement for the 1⁄2" sizes
Materials
No. Part
1 Cover
2 Locking nut
3 Thermostatic element
4 Strainer screen
5 Valve seat
6 Valve seat gasket
7 Valve
8 Spring
9 Body
10 Cover gasket
Cover stud
11 Cover nut
Cover washer
12 Seat insert
13 Name-plate
Material
Alloy steel
Stainless steel
Corrosive resistant bimetal and stainless steel
5
9
12
7
DIN 17243 13Cr Mo44 (W/S 1.7335)
BS 970 303 S21
1⁄2" - Rau Type RR
3⁄4" - 11⁄2" Type 100
ASTM A240 316L
BS 970 431 S29
BS 1449 304 S12
BS 970 431 S29
BS 2056 302 S26
DIN 17245 CS 22 Mo4
ASTM A193 Gr. B7
BS 4882 Gr. 2H
BS 4320 Table 1 Form A
BS 970 321 S20
BS 1449 304 S16
Stainless steel
Stainless steel
Stainless steel
Stainless steel
Stainless steel
Alloy steel
Spirally wound
Alloy steel
Carbon steel
Carbon steel
Stainless steel
Stainless steel
stainless steel graphite filled gasket
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