AS 4956:2017

Table of Contents

Abstract

This Standard specifies requirements for air valves for water systems. This Standard is applicable to valves rated at 600 kPa to 6400 kPa for sizes DN 15 to DN 400.

Scope

This Standard specifies requirements for metallic and plastics bodied PN 10, 12, 16, 25, 35 and 40 air valves for water supply. This Standard is applicable to valve sizes DN 15 to DN 250 that are suitable for, but not limited to, use in drinking water supplies, with a maximum operating temperature of 60°C (see Note 2).
This Standard covers the following types of valves:
(a) Large-orifice air valves.
(b) Small-orifice air valves.
(c) Double-orifice air valves.
(d) Anti-slam air valves.
(e) Anti-vacuum valves.
NOTES:
1 Purchasing guidelines are given in Appendix B.
2 Based upon a maximum water temperature of 40°C within the main and the air valve being located above ground exposed to sunlight.
3 Alternative pressure classes are available and may be specified.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
Pages
ISBN
Committee	WS-022
Supersedes	DR AS 4956:2015 AS 4956-2008