Devices, which on opening, with or without a delay, release fuel oil and shut-off without a delay on closing.
BS EN 264:1991 history
2014BS EN ISO 23553-1:2014 Safety and control devices for oil burners and oil-burning appliances. Particular requirements. Automatic and semi-automatic valves
2009BS 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 (ISO 23553-1:2007, including Cor 1:2009)
1991BS EN 264:1991 Specification for safety requirements and testing of safety shut-off devices for combustion plants using liquid fuels