Bosch Rexroth ZDR10DB3-5X/75YM sandwich pressure-reducing valve

Bosch Rexroth ZDR10DB3-5X/75YM is a size 10 sandwich pressure-reducing valve, factory article R900472027, for modular hydraulic stacks. This direct-operated valve reduces pressure in channel P on the component side. The control pressure is taken from B, with internal pilot supply and external pilot drainage. It also limits pressure in the secondary circuit through the documented relief path.

The lockable rotary knob with scale adjusts pressure up to the 75 bar stage endpoint. The manufacturer article lists a maximum pressure of 350.0 bar, maximum flow of 160.0 L/min and NBR seals. The limits shown are the values listed for this factory article. Later series-level ratings do not override these article-specific values.

The drain counterpressure must remain within the documented 160 bar limit. Minimum achievable secondary pressure depends on flow and drain pressure; the pressure stage is not a preset. Consult the applicable February 2025 series sheet for operating-fluid conditions, pressure/flow curves, exact mounting dimensions and stack-dependent mounting screws. Screws are ordered separately. The manufacturer image is representative of the series; use the execution-specific dimensional drawing for installation.