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eLibrary > BS ISO 23551-11:2024 Safety and control devices for gas burners and gas-burning appliances. Particular requirements - Automatic and semi-automatic shut-off valves for operating pressure of above 500 kPa up to and including 6 300 kPa >

BS ISO 23551-11:2024 Safety and control devices for gas burners and gas-burning appliances. Particular requirements - Automatic and semi-automatic shut-off valves for operating pressure of above 500 kPa up to and including 6 300 kPa, 2024

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BS ISO 23551-11:2024 Safety and control devices for gas burners and gas-burning appliances. Particular requirements - Automatic and semi-automatic shut-off valves for operating pressure of above 500 kPa up to and including 6 300 kPa, 2024

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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Classification [Go to Page]
4.1 Classes of controls [Go to Page]
4.1.1 Classification based on sealing force
4.1.2 Classifications 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
4.3 Types of DC supplied controls
4.4 Classes of control function
5 Test conditions and tolerances [Go to Page]
5.1 Test conditions
5.2 Tolerances
6 Construction [Go to Page]
6.1 General
6.2 Construction requirements [Go to Page]
6.2.1 Appearance
6.2.2 Holes
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
6.2.9 Auxiliary channels and orifices
6.2.10 Pre-setting device
6.2.11 Closed position indication
6.2.12 Specific construction
6.2.13 Flow rates of valves with modulating control
6.2.14 Bypass
6.2.15 Semi-automatic shut-off valve
6.2.16 Other controls assembled to a valve
6.2.17 Balanced valves
6.3 Materials [Go to Page]
6.3.1 General material requirements
6.3.2 Housing
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
6.3.9 Parts transmitting the closing force
6.3.10 Balanced valves
6.3.11 Bellows
6.3.12 Hydrostatic withstand pressure test
6.4 Connections [Go to Page]
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
6.4.11 Gas connections by GQC
6.4.12 Welded connections
6.5 Gas controls employing electrical components in the gas way
6.6 Pneumatic and hydraulic actuating mechanisms
7 Performance [Go to Page]
7.1 General
7.2 Leak-tightness [Go to Page]
7.2.1 General
7.2.2 Requirements
7.2.3 Test
7.2.4 Pressure surge test
7.3 Torsion and bending [Go to Page]
7.3.1 General
7.3.2 Torsion
7.3.3 Bending moment
7.3.4 Torsion and bending tests
7.4 Rated flow rate [Go to Page]
7.4.1 General
7.4.2 Requirements
7.4.3 Test
7.5 Durability
7.6 Functional requirements [Go to Page]
7.6.1 Closing function
7.6.2 Closing force
7.6.3 Delay time and opening time
7.6.4 Closing time
7.6.5 Sealing force
7.7 Endurance [Go to Page]
7.7.1 Requirement
7.7.2 Test
7.8 Vibration
8 Electrical requirements [Go to Page]
8.1 General
8.2 Requirements
8.3 Test
8.4 Protection by enclosure
8.5 Electrical components [Go to Page]
8.5.1 Switches
8.5.2 Plug connector
8.5.3 Power saving circuit
9 Electromagnetic compatibility (EMC) [Go to Page]
9.1 Protection against environmental influences
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 tests
9.6 Electrical fast transient/burst
9.7 Ring wave immunity
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 [Go to Page]
10.1 Marking
10.2 Installation and operating instructions
10.3 Warning notice
10.4 Annexes
Annex A (normative) Specific regional requirements in European countries
Annex B (normative) Specific regional requirements in Canada and USA
Annex C (normative) Specific regional requirements in Japan
Annex D (normative) Specific regional requirements in China
Bibliography [Go to Page]

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BS ISO 23551-11:2024 Safety and control devices for gas burners and gas-burning appliances. Particular requirements - Automatic and semi-automatic shut-off valves for operating pressure of above 500 kPa up to and including 6 300 kPa, 2024

⨯To continue with accurate pricing,
please select your company type below: