The flows of liquid fuels shall be capable of being Interrupted by means of safety shut-off devices, which, for example, are designed as automatic valves or fast closing devices. Their reliability shall be proven by type tests according to this standard. Other test methods may be allowed where necessary.
1.2 Field of application
This European standard comprises safety requirements and test methods for safety shut-off devices 1n combustion plants, which on opening release, with or without delay, the flow of the fuels mentioned below and shut off without delay on clo-sing.
This standard applies to the use of fuel oils. For other liquid fuels the test methods may be agreed between the manufacturer and the test institute.
This standard also applies to safety shul-off devices forming part of devices having other functions, i.e. oil pumps. In this case the test methods apply To those parts or components of the device forming the safety shut-off device, i.e. those parts which are necessary for the closing function.
1.3 References
CENELEC Harmonization Document 365 S2 IEC Publication 529 (1976) Classification of degrees of protection by enclosures Incorporating Amendment No. 1 (1978)
DS/EN 264:1991 history
2009DS/EN ISO 23553-1:2009 Safety and control devices for oil burners and oil-burning appliances - Particular requirements - Part 1: Shut-off devices for oil burners
1991DS/EN 264:1991 Safety shut-off devices for combustion plants using liquid fuels. Safety requirements and testing