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eLibrary > BS EN 16678:2022 Safety and control devices for gas burners and gas burning appliances. Automatic shut-off valves for operating pressure of above 500 kPa up to and including 6 300 kPa >

BS EN 16678:2022 Safety and control devices for gas burners and gas burning appliances. Automatic shut-off valves for operating pressure of above 500 kPa up to and including 6 300 kPa, 2022

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BS EN 16678:2022 Safety and control devices for gas burners and gas burning appliances. Automatic shut-off valves for operating pressure of above 500 kPa up to and including 6 300 kPa, 2022

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1 Scope
2 Normative references
3 Terms and definitions
4 Classification [Go to Page]
4.1 Classes of control
4.2 Groups of control
4.3 Classes of control functions
4.4 Types of DC supplied controls
5 Units of measurement and test conditions
6 Construction requirements [Go to Page]
6.1 General
6.2 Mechanical parts of the control [Go to Page]
6.2.1 Appearance
6.2.2 Holes
6.2.3 Breather holes
6.2.4 Screwed fastenings
6.2.5 Jointing
6.2.6 Moving parts
6.2.7 Sealing caps
6.2.8 Dismantling and reassembly
6.2.9 Auxiliary canals and orifices
6.2.10 Presetting devices
6.2.101 Closed position indicator switch [Go to Page]
6.2.102 Valve with modulating control
6.2.103 Balanced valves
6.2.104 Additional requirements for shut-off function
6.3 Materials [Go to Page]
6.3.1 General material requirements
6.3.2 Housing [Go to Page]
6.3.2.1 Requirements
6.3.2.2 Test
6.3.3 Zinc alloys
6.3.4 Springs providing closing and/or sealing force
6.3.5 Resistance to corrosion and surface protection
6.3.6 Impregnation
6.3.7 Seals for glands for moving parts
6.3.101 Closure members
6.3.102 Parts transmitting the closing force
6.3.103 Balanced valves
6.3.104 Bellows
6.4 Gas connections [Go to Page]
6.4.1 Making connections
6.4.2 Connection sizes
6.4.3 Threads
6.4.4 Union joints
6.4.5 Flanges
6.4.6 Compression fittings
6.4.7 Nipples for pressure test
6.4.8 Strainers
6.4.101 Welded connections
6.5 Electrical parts of the control [Go to Page]
6.5.1 General
6.5.2 Switching elements
6.5.3 Electrical components [Go to Page]
6.5.3.1 Performance of electrical components
6.5.3.2 Tests
6.5.3.3 Sensing element
6.5.3.4 Gas controls employing electrical components in the gas circuit
6.6 Protection against internal faults for the purpose of functional safety
6.101 Pneumatic and hydraulic actuating mechanisms
7 Performance [Go to Page]
7.1 General
7.2 Leak-tightness [Go to Page]
7.2.1 Requirements
7.2.2 Tests
7.3 Torsion and bending [Go to Page]
7.3.1 General
7.3.2 Torsion and bending moments
7.4 Rated flow rate
7.5 Durability [Go to Page]
7.5.1 Elastomers in contact with gas
7.5.2 Durability of Marking
7.5.3 Resistance to scratching
7.5.4 Resistance to humidity
7.5.5 Lubricants in contact with gas
7.6 Performance tests for electronic controls
7.7 Long-term performance for electronic controls
7.8 Data Exchange
7.101 Closing function [Go to Page]
7.101.1 Requirement
7.101.2 Test of closing function
7.102 Closing force [Go to Page]
7.102.1 Requirement
7.102.2 Test of closing force
7.103 Delay time and opening time [Go to Page]
7.103.1 Requirement
7.103.2 Test of delay time and opening time
7.104 Closing time [Go to Page]
7.104.1 Requirement
7.104.2 Test of closing time
7.105 Sealing force [Go to Page]
7.105.1 Requirement
7.105.2 Test of sealing force [Go to Page]
7.105.2.1 General
7.105.2.2 Class A valve
7.105.2.3 Balanced valve
7.106 Closed position indicator switch [Go to Page]
7.106.1 Requirement
7.106.2 Test of closed position indicator switch
7.107 Endurance [Go to Page]
7.107.1 Requirement
7.107.2 Endurance test
7.107.3 Endurance test for closed position indicator switch
8 Electrical requirements [Go to Page]
8.1 General
8.2 Protection by enclosure
8.101 Switches
8.102 Plug connections
8.103 Power saving circuits [Go to Page]
8.103.1 Closing of the valve
8.103.2 Overheating
8.103.3 Test of power-saving circuits
9 Electromagnetic compatibility (EMC) [Go to Page]
9.1 Protection against environmental influences
9.2 Supply voltage variations below 85 % of rated voltage
9.3 Voltage dips and interruptions
9.4 Supply frequency variations
9.5 Surge immunity tests
9.6 Electrical fast transient/burst
9.7 Immunity to conducted disturbances induced by radio frequency fields
9.8 Immunity to radiated disturbances induced by radio frequency fields
9.9 Electrostatic discharge tests
9.10 Power frequency magnetic field immunity tests
9.11 Harmonics and interharmonics including mains signalling at a. c. power port, low frequency immunity tests
10 Marking, instructions [Go to Page]
10.1 Marking
10.2 Instructions
10.3 Warning notice
Annex A (informative)Abbreviations and Symbols
Annex B (informative)Leak-tightness test for gas controls – volumetric method
Annex C (informative)Leak-tightness test for gas controls – pressure loss method
Annex D (normative)Calculation of pressure loss into leakage rate
Annex E (normative)Electrical/electronic component fault modes
Annex F (normative)Additional requirements for safety accessories and pressure accessories as defined in EU Directive 2014/68/EU
Annex G (normative)Materials for pressurized parts
Annex H (normative)Additional materials for pressurized parts
Annex I (normative)Requirements for controls used in DC supplied gas burners and appliances burning gaseous or liquid fuels
Annex J (normative)Method for the determination of a Safety Integrity Level (SIL)
Annex K (normative)Method for the determination of a Performance Level (PL) [Go to Page]
K.1 Scope
K.2 Normative references
K.3 Terms and definitions
K.4 Performance [Go to Page]
K.4.1 Operation mode
K.4.2 PL and field data evaluation
K.4.3 Hardware failure tolerance (HFT)
K.4.4 Common cause failure (CCF) [Go to Page]
K.4.4.1 General
K.4.4.2 Estimation of effect of CCF
K.4.5 Safe failure fraction (SFF)
K.4.6 Determination of the B10d value [Go to Page]
K.4.6.1 Requirements
K.4.6.2 Tests
K.4.7 Determination of Performance Level (PL)
K.4.8 PFHD values for structures consisting of two controls
K.5 Marking, instructions [Go to Page]
K.5.1 Marking
K.5.2 Instructions
K.5.3 Warning notice
Annex L (informative)Relationship between Safety Integrity Level (SIL) and Performance Level (PL)
Annex M (normative)Reset functions
Annex N (informative)Guidance document on Environmental Aspects
Annex O (normative)Seals of elastomer, cork and synthetic fibre mixtures
Annex ZA (informative)Relationship between this European Standard and the essential requirements of Regulation (EU) 2016/426 aimed to be covered [Go to Page]

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BS EN 16678:2022 Safety and control devices for gas burners and gas burning appliances. Automatic shut-off valves for operating pressure of above 500 kPa up to and including 6 300 kPa, 2022

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