Z2DB10VD1-4X/100

The Z2DB10VD1-4X/100 valve belongs to the ZDB Pressure Relief Valves series produced by Bosch Rexroth for hydraulic automation where circuit pressure must be controlled at a defined level. It is a pilot-operated pressure relief unit that mounts as a sandwich plate valve, allowing it to be placed between directional valves and subplates without extra piping. Pressure is set with a rotary knob identified as adjustment version 1, which permits precise manual tuning during start-up or maintenance. The nominal pressure rating of 100 bar establishes the relief threshold, and the VD configuration provides bidirectional protection for A–B and B–A flow paths. Two internal valve cartridges split pilot and main functions to maintain stable performance under variable flow. The design can be installed in any position, giving machine builders flexibility when arranging manifold stacks.

The assembly tolerates a maximum operating pressure of 315 bar and remains accurate even when 40 bar counter pressure is present in the return line. NBR seals isolate the working fluid and resist common hydraulic oils used in mobile and industrial equipment. To avoid premature wear, system cleanliness must meet ISO 4406 class 20/18/15, limiting particulate contamination at critical surfaces. The housing is supplied without corrosion protection, so external coatings or sheltered installation should be considered in aggressive atmospheres. The block is manufactured without a locating hole, so alignment relies solely on the porting pattern when stacking plates. The design allows the valve to limit over-pressure while supporting compact sandwich assembly in diverse hydraulic circuits.