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BSI 23/30451328 DC:2023 Edition

BSI 23/30451328 DC:2023 Edition

$13.70

BS ISO 23551-1. Safety and control devices for gas burners and gas-burning appliances. Particular requirements – Part 1. Automatic and semi-automatic shut-off valves

Published By Publication Date Number of Pages
BSI 2023 52
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PDF Catalog

PDF Pages PDF Title
1 30451328-NC.pdf
3 ISO_DIS 23551-1 ed.3 – id.83847 Enquiry PDF (en).pdf
8 Foreword
10 Introduction
11 1 Scope
2 Normative references
3 Terms and definitions
15 4 Classification
4.1 Classes of control
4.1.1 Classification based on sealing force
4.1.2 Classification based on pressure surge
4.1.3 Classification with neither sealing force nor pressure surge
4.1.4 Classification of flow control valves for general purpose
4.2 Groups of controls
16 4.3 Types of DC supplied controls
4.4 Classes of control functions
5 Test conditions and tolerances
6 Construction
6.1 General
17 6.2 Construction requirements
6.2.1 Appearance
6.2.2 Holes
18 6.2.3 Breather holes
6.2.4 Vent limiter
6.2.5 Screwed fastenings
6.2.6 Moving parts
6.2.7 Sealing caps
6.2.8 Disassembling and assembling for servicing and/or adjustment for controls
19 6.2.9 Auxiliary channels and orifices
6.2.10 Pre-setting device
20 6.2.11 Closed position indication
21 6.2.12 Specific construction
6.2.13 Flow rates of valves with modulating control
22 6.2.14 Bypass
6.2.15 Semi-automatic shut-off valve
6.2.16 Diaphragm type valve
6.2.17 Balanced valves with one or two ports
23 6.3 Materials
6.3.1 General material requirements
6.3.2 Housing
24 6.3.3 Springs providing closing force and sealing force
6.3.4 Resistance to corrosion and surface protection
6.3.5 Impregnation
6.3.6 Seals for glands for moving parts
6.3.7 Jointing
6.3.8 Closure members
25 6.4 Connections
6.4.1 General
6.4.2 Connection sizes
6.4.3 Connections types
6.4.4 Threads
6.4.5 Union joints
6.4.6 Flanges
6.4.7 Compression fittings
6.4.8 Flare connections
6.4.9 Nipples for pressure tests
6.4.10 Strainers
26 6.4.11 Gas connections by GQC
6.4.12 Hydraulic and pneumatic actuating mechanisms
6.5 Gas controls employing electrical components in the gas way
7 Performance
7.1 General
27 7.2 Leak-tightness
7.2.1 General
7.2.2 Requirement
28 7.2.3 Test
7.2.4 Pressure surge test
7.3 Torsion and bending
7.4 Rated flow rate
7.4.1 General
7.4.2 Requirement
7.4.3 Test
7.5 Durability
7.6 Functional requirements
29 7.6.1 Closing function
7.6.2 Opening and closing function of thermoelectric valves
30 7.6.3 Closing force
7.6.4 Delay time and opening time
31 7.6.5 Closing time
7.6.6 Sealing force
32 7.6.7 Gas cracking
33 7.7 Endurance
7.7.1 Requirements
35 7.7.2 Test
36 7.8 Hydrostatic withstand pressure test
7.8.1 General
7.8.2 Requirement
37 7.8.3 Test
7.9 Resistance to permanent damage at excessive supply pressure
7.9.1 General
7.9.2 Requirement
38 7.9.3 Test
8 Electrical equipment
8.1 General
8.2 Requirements
8.3 Test
8.4 Protection by enclosure
8.5 Electric strength for valves
8.6 Heating
8.6.1 General
39 8.6.2 Test conditions
8.6.3 Burnout test
8.7 Electrical components
8.7.1 Switches
8.7.2 Plug connector
40 8.7.3 Power-saving circuit
41 9 EMC/Electrical requirements
9.1 Protection against environmental influences
9.1.1 General
9.1.2 Requirements
9.2 Harmonics and interharmonics including mains signalling at a.€c. power port, low frequency immunity
9.3 Voltage dips, voltage interruptions and voltage variations in the€power supply network
9.4 Test of influence of voltage unbalance
9.5 Surge immunity test
9.6 Electrical fast transient/burst
9.7 Ring wave immunity
42 9.8 Electrostatic discharge
9.9 Radio-frequency electromagnetic field immunity
9.10 Influence of supply frequency variations
9.11 Power frequency magnetic field immunity
9.12 Evaluation of compliance
10 Marking, installation and operating instructions
10.1 Marking
10.2 Installation and operating instructions
43 10.3 Warning notice
44 Annex€A (informative) Leak-tightness test — Volumetric method
45 Annex€B (informative) Leak-tightness test — pressure-loss method
46 Annex€C (normative) Conversion of pressure loss into leakage rate
47 Annex€D (normative) Gas quick connector (GQC)
48 Annex€E (normative) Elastomers/requirements resistance to lubricants and gas
49 Annex€F (normative) Specific regional requirements in European countries
50 Annex€G (normative) Specific regional requirements in Canada and the USA
51 Annex€H (normative) Specific regional requirements in Japan
52 Bibliography

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