ISO 23553-1:2022 pdf download – Safety and control devices for oil burners and oil-burning appliances — Particular requirements — Part 1: Automatic and semi-automatic valves.
3.4 group 1 control controls (3.2) with connection sizes up to and including DN 25, for use in an appliance where they are not subjected to bending stresses imposed by installation pipe work or in an installation if used with rigid adjacent supports Note 1 to entry: In Canada, Japan and the USA, group 1 controls are not used. 3.5 group 2 control controls (3.2) for use in any situation, either internal or external to the appliance, typically without support Note 1 to entry: Controls (3.2) which meet the requirements of group 2 control also meet the requirements of group 1 control (3.4). 3.6 internal leak-tightness leak-tightness of the closure member (3.1) (in the closed position) sealing an oil-carrying compartment with respect to another compartment or to the outlet of the control (3.2) 3.7 pressure difference difference between the pressure at the inlet of the control and outlet of the control 3.8 maximum operation pressure highest inlet pressure declared by the manufacturer at which the control (3.2) may be operated 3.9 minimum operation pressure lowest inlet pressure declared by the manufacturer at which the control (3.2) may be operated 3.10 flow? rate volume flowing through the control (3.2) divided by time 3.11 maximum ambient temperature highest temperature of the surrounding air declared by the manufacturer at which the control (3.2) may be operated 3.12 minimum ambient temperature lowest temperature of the surrounding air declared by the manufacturer at which the control (3.2) may be operated 3.13 mounting position position declared by the manufacturer for mounting the control (3.2) Note 1 to entry: Mounting positions are, for example, as follows: — upright: single position on a horizontal axis with respect to the inlet connection, as specified by the manufacturer; — horizontal: any position on a horizontal axis with respect to the inlet connection; — vertical: any position on a vertical axis with respect to the inlet connection; — limited horizontal: any position from upright to 90° (1,57 rad) from upright on a horizontal axis with respect to the inlet connection;
3.14 diameter nominal DN nominal size alphanumeric designation of size for components of a pipework system, which is used for reference purposes, comprising the letters DN followed by a dimensionless whole number which is indirectly related to the physical size, in millimetres, of the bore or outside diameter of the end connections Note 1 to entry: The number following the letters DN does not represent a measurable value and should not be used for calculation purposes except where specified in the relevant standard. Note 2 to entry: In standards which use the DN designation system, any relationship between DN and component dimensions should be given, e.g. DN/OD or DN/ID. [SOURCE: ISO 6708:1995, 2.1, modified — The two sentences have been merged into one.] 3.15 nominal pressure PN numerical designation relating to pressure that is a convenient round number for reference purposes [SOURCE: ISO 7268:1983, Clause 2] 3.16 valve device consisting essentially of a valve body, closure member (3.1), and actuator (3.24) that controls the oil flow Note 1 to entry: The actuator (3.24) can be actuated by electrical or mechanical means. Note 2 to entry: The actuation can be done by oil pressure, electrical, hydraulic or pneumatic energy.
ISO 23553-1:2022 pdf download – Safety and control devices for oil burners and oil-burning appliances — Particular requirements — Part 1: Automatic and semi-automatic valves
