ISO 23553-1:2014 specifies safety, constructional and performance requirements and testing of automatic and semi-automatic valves for oil. It applies to automatic and semi-automatic valves which are: -normally closed; -used in combustion plants to interrupt the oil flow with or without delay on closing; -for use with oil types (e.g. middle distillate fuel oil, crude oil, heavy fuel oil or kerosene) without gasoline; -for use on burners or in appliances using oil; -directly or indirectly operated, electrically or by mechanical or hydraulic means; -fitted with or without closed-position indicator switches. ISO 23553-1:2014 covers type testing only.