The Rexroth R900593530 DB20-2-5X/315 is a direct operated pressure relief valve designed to limit the pressure in a hydraulic system. It protects hydraulic systems from excessive pressure by diverting flow to the tank when the set pressure is reached. This valve is suitable for subplate mounting and is commonly used in various industrial hydraulic applications to ensure system safety and control. The “-2-” in the type code indicates it is a pilot operated valve with a poppet type main stage, but the DB series are generally direct operated. Given the DB20 designation and typical Rexroth nomenclature, it is a direct operated valve. The “5X” denotes the component series, and “315” indicates the maximum pressure setting in bar.