Bosch Rexroth DB10-1-5X/350 pilot-operated pressure-relief valve

DB10-1-5X/350 is a pilot-operated hydraulic pressure-relief valve for limiting system pressure from P to T. Factory article R900593794 is a size 10 subplate execution with NBR seals and rotary knob adjustment. Pilot-oil supply is internal and pilot-oil return is internal; these are separate hydraulic functions. Pressure is adjustable up to 350 bar, which is an adjustment endpoint rather than a declared factory preset.

Pressure and flow ratings are operating ceilings rather than a guaranteed simultaneous operating point. Observe the relevant fluid, cleanliness, seal, installation and characteristic-curve requirements when selecting the valve.

Minimum attainable pressure depends on flow. For internal pilot return, pressure in the T line adds to the attained inlet pressure; external pilot-return piping must follow the manufacturer’s hydraulic diagram.