UL 87B-2015 pdf download – Standard for Power-Operated Dispensing Devices for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20), Kerosene, and Fuel Oil.
4.3 Strainers 4.3.1 A dispensing device shall be provided with at least one strainer. The strainer shall comply with Strainers, Section 1 2. The strainer or strainer assembly shall be constructed and located to permit the removal and replacement of the straining element without breaking liquid lines or disturbing any part of the dispensing device assembly and to permit ready access for cleaning with minimum spillage of fluid. 4.4 Electrically operated valves 4.4.1 A dispensing device for use in a remote control system, or a single inlet dual outlet self-contained dispensing device, incorporating only one pump, shall have in each discharge line a shutoff valve that closes at the time or before the hose nozzle valve is hung in place on the device. 4.4.2 A power-operated dispensing device of the self-contained single outlet type is not required to be equipped with a shutoff valve as specified in 4.4.1 . 4.4.3 A plug or rotating disc type valve employing the bearing surface of the plug or disc as the liquid seal to the exterior of the valve body shall not be used in liquid lines. 4.4.4 An electrically operated shutoff valve shall close upon being de-energized, regardless of the position of any operating lever or reset handle. 4.4.5 Valves, as needed, are required in the construction of dispensing devices in order to maintain system priming thereby minimizing the risk of seal dry out. 4.5 Hose nozzle valve 4.5.1 A dispensing device may be furnished without a hose nozzle valve provided it is marked in accordance with 43.1 .1 (c). 4.6 Mechanically operated valves 4.6.1 A plug or rotating disc type valve, employing the bearing surface of the plug or disc as the liquid seal to the exterior of the valve body, shall not be used in liquid lines. 4.6.2 A petcock or other manually operated valve shall not be provided, which when open, permits the discharge of fluid.