UL 842-2015 pdf download – Valves for Flammable Fluids.
2 General 2.1 Components 2.1.1 Except as indicated in 2.1.2, a component of a product covered by this standard shall comply with the requirements for that component. 2.1.2 A component is not required to comply with a specific requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.1.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.1 .4 Specific components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specified limits, and shall be used only under those specific conditions. 2.2 Units of measurement 2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 2.3 Undated references 3.3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard.
3 Glossary 3.1 For the purpose of this standard, the following definitions apply. 3.2 EMERGENCY SHUTOFF VALVES – Valves intended for installation at the inlet of remote control type flammable liquid dispensing devices. They are normally held open by a mechanical holding means. They incorporate a fusible element and close automatically in the event of exposure to fire or break-off resulting from severe impact. They are designed for an operating pressure of not less than 50 psi (345 kPa). 3.3 FLAMMABLE AND COMBUSTIBLE FLUIDS – Fuel oil, gasoline, diesel, kerosene, and similar petroleum products which are formulated in accordance with Regulation of Fuels and Fuel Additives, 40CFR80, and the following: a) Gasoline formulated in accordance with the Standard Specification for Automotive Spark- Ignition Engine Fuel, ANSI/ASTM D4814. b) Gasoline/ethanol blends at levels designated as ″gasohol″ (E10) or less formulated in accordance with ANSI/ASTM D4814, when blended with denatured fuel ethanol formulated in accordance with the Standard Specification for Denatured Fuel Ethanol for Blending with Gasolines for Use as Automotive Spark-Ignition Engine Fuel, ANSI/ASTM D4806.
4.2 Shutoff valves 4.2.1 A shutoff valve shall not be equipped with a bypass or with a means to prevent it from closing completely. 4.2.2 The requirement in 4.2.1 does not apply to a feature provided to permit a take-off to recirculate fluid or to supply a pilot or other individually controlled outlet. 4.2.3 The appropriate operating positions or the direction of movement shall be clearly indicated for a manual operating lever or reset handle included in a nonself-closing type valve. 4.2.4 An automatic shutoff valve shall function as a shutoff regardless of the position of any damper or external operating lever or any reset device. The manipulation of a manual-reset device shall not cause the valve to function as an automatic-reset valve. 4.2.5 An automatic shutoff valve shall not be equipped with means for manually latching the valve in the open position in a manner which prevents the valve from functioning as a shutoff. 4.2.6 An automatic shutoff mechanism shall be guarded to prevent interference with the intended operation of the mechanism. 4.2.7 When a mechanically actuated indicator is provided to show whether the main valve is open or shut, it shall be visible from a distance of at least 5 feet (1.52 m). 4.2.8 An automatic shutoff valve shall close independently of the energy supplied by the medium flowing. The medium flowing is not prohibited from being used to exert supplementary forces on the valve seat.