Z2DB10VD2-4X/315

The Z2DB10VD2-4X/315 valve belongs to the ZDB Pressure Relief Valves series produced by Bosch Rexroth for hydraulic automation circuits that require controlled pressure limitation. It mounts as a sandwich plate valve, so it can be inserted between subplate and directional valve without extra piping. The unit can be installed in any position, giving designers flexibility when arranging a manifold block. Pressure is adjusted through a hexagon sleeve with a protective cap, allowing safe setting changes during commissioning. Its relief path works bidirectionally from A to B and from B to A, permitting symmetrical protection of both service lines. The maximum operating pressure reaches 315 bar, and the same figure defines its pressure rating, aligning component strength with the intended system range.

Pilot oil is routed externally through port T, which prevents drain flow from passing through the main gallery and avoids back-pressure influence on the pilot stage. Counter pressure on the return line must stay below 40 bar to maintain stable valve opening characteristics. System fluid cleanliness should be maintained at ISO 4406 code 20/18/15 or better to keep the internal seat and spool surfaces free from abrasive particles. NBR seals are fitted to provide compatibility with standard mineral hydraulic oils while remaining resilient at the rated pressure. These parameters outline the operating environment and service limits that must be observed for consistent pressure relief performance.