scope:

This part of ISO 23553 specifies safety, constructional andperformance requirements and testing of automatic andsemi-automatic valves for oil. It applies to automatic andsemi-automatic valves which are: ? normally closed; ? used incombustion plants to interrupt the oil flow with or without delayon closing; ? for use with oil types (e.g. middle distillate fueloil, crude oil, heavy fuel oil or kerosene) without gasoline; NOTE1 For other oil types (e.g. oil emulsions), additional test methodscan be agreed between the manufacturer and the test authority. NOTE2 Oil types from petroleum refining processes are classifiedISO-F-D in ISO 8216-99 and form part of a device having otherfunction(s), such as oil pumps. In this case the test methods applyto those parts or components of the device forming the automaticand semi-automatic valves, i.e. those parts which are necessary forthe closing function; ? for use on burners or in appliances usingoil; ? directly or indirectly operated, electrically or bymechanical or hydraulic means; ? fitted with or withoutclosed-position indicator switches. This part of ISO 23553 coverstype testing only.