AS 3579-1993

1 - AS 3579-1993 CAST IRON WEDGE GATE VALVES FOR GENERAL PURPOSES
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AN D GENERAL
6 - 1.1 SCOPE
6 - 1.2 REFERENCED DOCUMENTS
7 - 1.3 DEFINITIONS
7 - 1.3.1 Gate valve
7 - 1.3.2 Class
7 - 1.3.3 Maximum working pressure
7 - 1.3.4 Maximum working temperature
7 - 1.3.5 Face-to-face dimensions
7 - 1.3.6 Nominal size
7 - 1.4 DESIGNATION OF SIZE
7 - 1.5 PRESSURE CLASSIFICATION
8 - SECTI ON 2 MATERIALS AND COMPONENTS
8 - 2.1 MATERIALS
8 - 2.2 DEZINCIFICATION-RESISTANT MATERIALS
10 - SECTION 3 DESIGN, MANUFACTURE AND OPERATION
10 - 3.1 END CONNECTIONS
10 - 3.1.1 Flanged ends
10 - 3.1.2 Face-to-face dimensions
10 - 3.1.3 Shouldered ends
10 - 3.1.4 Grooved ends
10 - 3.2 COMPONENT DESIGN
10 - 3.2.1 Body-end ports
10 - 3.2.2 Body guides and wedge guides
10 - 3.2.3 Wedge travel
10 - 3.2.4 Body-to-bonnet connection
10 - 3.2.5 Stems (spindles)
10 - 3.2.6 Valve seats
10 - 3.2.7 Jointing material
10 - 3.2.8 Stem sealing
11 - 3.2.9 Dimensions
11 - 3.2.10 Stem and thrust collar
11 - 3.2.11 Wedge nut
11 - 3.2.12 Yokes
11 - 3.3 OPERATION
11 - 3.3.1 General
11 - 3.3.2 Direction
11 - 3.4 FINISH
16 - SECTION 4 TESTING
16 - 4.1 GENERAL
16 - 4.2 TEST PRESSURES
16 - 4.3 TEST DURATION
16 - 4.4 TYPES OF TEST
16 - 4.4.1 ‘Closed end’ test (bulkhead testing condition)
16 - 4.5 TEST PROCEDURE
16 - 4.5.1 General
16 - 4.5.2 Body test
16 - 4.5.3 Valve seat test
17 - SECTION 5 MARKING
17 - 5.1 BODY MARKINGS
17 - 5.2 DIRECTION OF CLOSURE
18 - APPENDIX A - PURCHASING GUIDE
18 - A1 GENERAL
18 - A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
18 - A3 INFORMATION TO BE SUPPLIED BY THE MANUFACTURER
19 - A4 MATTERS FOR AGREEMENT BETWEEN PURCHASER AND THE MANUFACTURER

Specifies requirements for valves of inside screw, non-rising or outside screw, and rising stem in a nominal size range of DN 50 to DN 300. The valves are generally handwheel-operated and not recommended for buried service.

This Standard specifies requirements for flanged- shouldered and grooved-end, cast iron gate valves with solid wedge, metal seat, and either inside screw, non-rising stem or outside screw, rising stem, for general purposes in nominal sizes of DN 50 to DN 300. The gate valves are generally handwheel-operated and not recommended for buried service. The valves can be installed with the stem in any orientation.NOTES:1 Cast iron gate valves to this Standard differ from valves to AS 2638 which are recommended for buried service for waterworks purposes.2 Guidelines for purchasers on requirements that must or may need to be agreed upon at the time of enquiry or order are given in Appendix A.

First published as AS 3579-1988.
Second edition 1993.