Z2DBY6DD2-1X/160V/60

The Z2DBY6DD2-1X/160V/60 pressure relief valve belongs to the ZDB Pressure Relief Valves series and is produced by Bosch Rexroth for hydraulic automation tasks that require reliable pressure limitation in sandwich plate manifolds. Its sandwich plate connection type simplifies stacking with other ISO 4401 size 6 components, and the stated size 6 defines the flow path dimensions inside the plate. The porting pattern ISO 4401-03-02-0-05 matches standard sub-plates so no adapter is needed. Pressure rating options of 50, 100, 200, or 315 bar give designers fixed stages for different circuit demands, while the maximum operating pressure of 315 bar sets the absolute limit the housing and internals can withstand. A maximum flow of 60 l/min lets the valve protect medium-capacity actuators without generating excessive pressure drop. External pilot oil drainage via port T separates pilot flow from the main return line and prevents back-pressure interference. Hydraulic oils with viscosities between 10 and 800 mm²/s can be used, allowing operation on common mineral or synthetic fluids.

Service conditions are supported by FKM seals that tolerate ambient temperatures from –15 to +80 °C, making the valve suitable for indoor and moderate outdoor installations. The required fluid cleanliness class of ISO 4406 (c) 20/18/15 limits contamination that could disturb the pilot stage and poppet seat. A counter pressure of up to 40 bar can be present on the tank side without affecting set pressure, which helps when the return line is shared with other devices. The valve can be mounted in any position, giving freedom when arranging manifold blocks. Tightening the SW24 hexagon to 50 Nm secures the body against plate surfaces without overloading the studs. A locating hole of Ø3 × 5 mm assists in accurate alignment during assembly, and a locking pin conforming to ISO 8752-3×8-St keeps the stack from shifting under shock loads. These mechanical details, combined with the earlier hydraulic data, ensure consistent pressure relief performance across a wide range of installations.