Bosch Rexroth | ZDBT-XP2-1X350
ZDBT-XP2-1X/350
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The ZDBT-XP2-1X/350 pressure relief valve belongs to the ZDB Pressure Relief Valves series from Bosch Rexroth and is used to cap circuit pressure in hydraulic automation systems. It is identified within component series 1X, marking the current design release for this size. A nominal size of 6 keeps the valve footprint small, allowing installation in compact manifolds. The porting pattern follows ISO 4401-03-02-0-05, so it aligns with standard NG6 subplates. Four M5 mounting screws in accordance with ISO 4762 secure the housing and maintain sealing integrity. Return flow from port T is directed to tank through a separate line to prevent back-pressure influence. The assembled unit weighs 2.0 kg, permitting manual positioning during service.
The valve handles an operating pressure of 350 bar at port P, enabling use in high-pressure circuits. Its adjustment range spans from a minimal set pressure of 3 bar up to a maximum of 350 bar, giving flexibility for diverse installations. Flow capacity is limited to 3 l/min, which suits pilot or low-capacity relief functions. Hysteresis stays within 5 percent to keep pressure re-closure consistent after each release. Sealing against the manifold relies on 9.25 × 1.78 mm O-rings at ports P and T to stop external leakage. The design is intended for mineral oil hydraulic fluids conforming to DIN 51524, and it tolerates fluid temperatures up to 80 °C without damage. A cleanliness level of ISO 4406 20/18/15 is required so particulate contamination does not affect the set point.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Component Series
1X
Fluid Temperature (max)
80 C
Hydraulic Fluid
Mineral Oil (DIN 51524)
Hysteresis
5% (max)
Max Flow
3 l/min
Max Operating Pressure (port P)
350 bar
Max Set Pressure
350 bar
Minimal Set Pressure
3 bar
Mounting Screws
4x M5 (ISO 4762)
Nominal Size
6
O-ring Size (p,t Ports)
9.25x1.78 mm
Porting Pattern
ISO 4401-03-02-0-05
Return Flow (port T)
To Tank (separate)
Weight
2.0 kg
1620 Old Apex Road
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