R901456425 Bosch Rexroth Pressure relief valve

Pressure valves of type ZDB6D and Z2DB6D are direct operated pressure relief valves in sandwich plate design. The valves basically consist of housing (1) with seat (2) and control spool (3). The system pressure is set via the adjustment type (4). The valves are closed in their rest position and protect a hydraulic system and its components against excessive pressures. These valves respond quickly, noiselessly and in a virtually leakage-free manner. Thanks to the seat design, they are resistant against oil contamination. The integrated damping of the control spool (3) ensures extremely stable behavior, as well as a low pressure increase with increasing flow. In the state as delivered, the valves are set to the minimum possible pressure. The system pressure applied to channel P acts on the control spool (3). If the system pressure increases above the set value, the control spool (3) opens and the hydraulic fluid flows from channel P in channel T. This limits the system pressure to the set value. For versions “MP”, “MA” and “MB”, the set system pressure can be recorded and monitored using a pressure load cell at the measuring port (5) (see dimensions) Type ZDB 6 DP2 …MP…

➀	component side
➁	plate side