For rotary-pump systems, the vendor shall furnish external pressure-limiting valves that shall be installed on the pump or in the piping supplied by the vendor. This valve shall not be used for pressure control. Pressurelimiting valve settings, including an allowance for accumulation, shall be determined after all of the possible equipment and component failures are considered. The settings shall protect the oil-system components and piping. Fully accumulated pressure cannot exceed 110 % of the system design pressure.