Bosch Rexroth | ZDR6DA2-4X150Y12
ZDR6DA2-4X/150Y/12
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The ZDR6DA2-4X/150Y/12 pressure reducing valve belongs to the ZDR Pressure Reducing Valves series manufactured by Bosch Rexroth for hydraulic automation circuits that require controlled secondary pressure. It is built in valve size 6 and installs as a sandwich plate, so it can be stacked between sub-plates without extra piping. The porting pattern follows ISO 4401-03-02-0-05, allowing interchange with other CETOP 03 components. Pressure reduction takes place in channel A, and the pilot oil is taken from an internal supply while the return is external, which simplifies circuit design while keeping pilot flow clean. The secondary pressure can be set up to 150 bar, and the inlet side tolerates operating pressure up to 315 bar for reserve capacity during load peaks. A sleeve with a hexagon head and protective cap provides the adjustment interface, enabling accurate setting with a standard wrench. Counter pressure on port T(Y) is permissible up to 160 bar, so back-pressure effects do not disturb regulation.
Flow through the ZDR6DA2-4X/150Y/12 is limited to 50 l/min, matching typical pump outputs in medium-sized power units. An integrated check valve permits free reverse flow, letting the actuator exhaust without adding extra components. Leakage oil is routed externally via port T(Y), preventing heat build-up inside the sandwich stack. A G1/4 pressure-gauge connection, machined 12 mm deep, gives direct access for monitoring the reduced line. Four M5 ISO 4762 class 10.9 screws secure the valve, ensuring consistent clamping force across the sealing faces. NBR seals are used, offering compatibility with common mineral hydraulic oils at standard temperature ranges. System cleanliness must reach ISO 4406 (c) 20/18/15 to maintain spool reliability and avoid premature wear. These characteristics define the valve’s operating envelope inside proportional or fixed displacement pump systems where stable downstream pressure is required.
Technical Specifications
Adjustment Type
Sleeve With Hexagon (With Cap)
Check Valve
Included
Cleanliness Class
ISO 4406 (c) 20/18/15
Leakage Oil Drain
External Via T(Y)
Max Counter Pressure (t(y))
160 bar
Max Flow
50 l/min
Max Operating Pressure (input)
315 bar
Mounting Screws
4 × M5 ISO 4762 (10.9)
Mounting Type
Sandwich Plate
Pilot Oil Circuit
Internal Supply/External Return
Porting Pattern
ISO 4401-03-02-0-05
Pressure Gauge Port
G1/4 (12 mm Deep)
Pressure Rating (secondary)
150 bar
Pressure Reduction Channel
A
Seal Material
NBR
Valve Size
6
1620 Old Apex Road
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