Bosch Rexroth | ZDR6DA2-4X75Y
ZDR6DA2-4X/75Y
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The ZDR6DA2-4X/75Y valve belongs to the ZDR Pressure Reducing Valves series and is manufactured by Bosch Rexroth for hydraulic automation tasks that require stable downstream pressure. It is built as a size 6 sandwich plate unit so it can be stacked between subplate and control valve bodies without additional piping. A secondary pressure rating of 75 bar allows it to limit pressure in the A-port circuit, while a maximum inlet pressure of 315 bar tolerated by version A protects the housing against high supply peaks. Pressure is reduced at port A, and an integrated check valve in version A permits free reverse flow when the actuator retracts. Adjustment is carried out through a sleeve with a hexagon and a protective cap, giving secure setting changes during maintenance. A G1/4 pressure-gauge port is provided for direct monitoring of the reduced pressure.
Flow characteristics are matched to medium-sized circuits; the valve passes up to 50 l/min while keeping pressure drops within design limits. Counter pressure at port T(y) may reach 160 bar, so return lines can share common manifolds without affecting regulation accuracy. Pilot oil can be supplied internally or returned externally, offering flexibility in system layouts that separate pilot flow from tank lines. Cleanliness must reach ISO 4406 20/18/15 to prevent spool blockage, and NBR seals are fitted to handle common mineral oils used in industrial machinery. Installation follows the ISO 4401-03-02-0-05 porting pattern and uses four M5 ISO 4762-10.9 mounting screws to secure the sandwich stack against line shock. These parameters together ensure the valve maintains reliable pressure control under the specified service conditions.
Technical Specifications
Adjustment Type
Sleeve With Hexagon + Protective Cap
Check Valve
Included (Version A)
Cleanliness Class
ISO 4406 20/18/15
Design
Sandwich Plate
Max Counter Pressure Port T(y)
160 bar
Max Inlet Pressure (version A)
315 bar
Maximum Flow
50 l/min
Mounting Screws
4×M5 ISO 4762-10.9
Pilot Oil (supply/return)
Internal/External
Porting Pattern
ISO 4401-03-02-0-05
Pressure Gauge Port
G1/4
Pressure Reduction Port
A
Seal Material
NBR
Secondary Pressure Rating
75 bar
Size
6
1620 Old Apex Road
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