1 - AS 4118.1.8-1999 FIRE SPRINKLER SYSTEMS - COMPONENTS - PRESSURE-REDUCING VALVES
4 - PREFACE
5 - CONTENTS
6 - FOREWORD
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 APPLICATION
7 - 1.3 OBJECTIVE
7 - 1.4 NEW DESIGNS AND INNOVATIONS
7 - 1.5 APPROVAL AND LISTINGS
7 - 1.6 REFERENCED DOCUMENTS
8 - 1.7 DEFINITIONS
8 - 1.7.1 Pressure-reducing valve
8 - 1.7.2 Bronze
9 - SECTION 2 REQUIREMENTS
9 - 2.1 NOMINAL SIZES
9 - 2.2 CONNECTIONS
9 - 2.3 RATED WORKING PRESSURES
9 - 2.4 BODIES AND COVERS
9 - 2.5 STRENGTH OF BODY
10 - 2.6 MECHANICAL STRENGTH
10 - 2.7 ACCESS FOR MAINTENANCE
10 - 2.8 COMPONENTS
11 - 2.9 NON-METALLIC COMPONENTS
11 - 2.10 SEALING ASSEMBLY ELEMENTS
11 - 2.11 CLEARANCES
12 - 2.12 OPERATING TORQUE
12 - 2.13 PROVISION FOR VALVE SECURITY
12 - 2.14 SPRINGS AND DIAPHRAGMS
13 - 2.15 OPERATIONAL PERFORMANCE
13 - 2.16 BACK PRESSURE
13 - 2.17 DURABILITY
13 - 2.18 LEAKAGE
14 - SECTION 3 TEST METHODS
14 - 3.1 BODY STRENGTH TEST
14 - 3.1.1 General
14 - 3.1.2 Procedure
14 - 3.2 MECHANICAL STRENGTH TEST
14 - 3.3 NON-METALLIC COMPONENTS TEST
14 - 3.3.1 Air-oven ageing - Excluding gaskets and seals
15 - 3.3.2 Warm water ageing - Excluding gaskets and seals (see Clause 2.9)
15 - 3.3.3 Test for sealing assembly seals
16 - 3.4 OPERATING TORQUE TEST
16 - 3.5 SPRING AND DIAPHRAGM TEST
16 - 3.6 OPERATIONAL TESTS
17 - 3.7 LEAKAGE TEST
17 - 3.7.1 Seat leakage test
17 - 3.7.2 Body leakage test
17 - 3.7.3 One year static leakage test
18 - 3.8 DURABILITY TEST
18 - 3.9 FIRE EXPOSURE TEST FOR PRESSURE-REDUCING VALVES MADE OF METALLIC MATERIALS WITH MELTING POINTS LESS THAN 800°C OR OF NON-METALLIC MATERIALS
19 - SECTION 4 MARKING
19 - 4.1 GENERAL
19 - 4.2 BODY MARKINGS
20 - SECTION 5 MANUFACTURER'S INSTRUCTIONS