Bosch Rexroth | ZDR6DA2-4X210YM
ZDR6DA2-4X/210YM
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The ZDR6DA2-4X/210YM valve is part of the ZDR Pressure Reducing Valves series from Bosch Rexroth and maintains a stable secondary pressure in hydraulic automation circuits. It is built to nominal size 6, establishing the flow path dimensions that match common manifold layouts. A mounting pattern of ISO 4401-03-02-0-05 permits direct stacking on standardized subplates, while compliance with the NFPA T3.5.1 R2 D03 interface standard supports interchangeability in North American installations. Pressure is adjusted by a sleeve with a hexagon and a protective cap, letting maintenance personnel set the outlet value without tools that could damage the stem. The secondary pressure is limited to 210 bar to protect downstream components, and the valve tolerates an input pressure up to 315 bar from the supply line. Reduction occurs through port A2, and the pilot oil uses an internal supply with an external return so the control flow stays isolated from main discharge.
The assembly handles a continuous flow of 50 l/min, allowing it to serve medium-capacity actuator branches. Backpressure at port T can reach 160 bar without disrupting regulation accuracy, and hydraulic media with viscosities up to 800 mm²/s are accepted for reliable cold-start operation. A fluid temperature ceiling of 80 °C matches widely used mineral oils, and a cleanliness class of ISO 4406 20/18/15 prevents particle-induced wear on throttling edges. NBR seals contain the fluid and resist swelling in standard oil formulations, while the absence of an integrated check valve means reverse flow must be controlled elsewhere. The housing weighs 1.2 kg, making the unit light enough for single-person installation inside compact hydraulic manifolds.
Technical Specifications
Adjuster Type
Sleeve With Hexagon, Protective Cap
Check Valve
None
Cleanliness Class
ISO 4406 20/18/15
Fluid Temperature Max (nbr)
80 °C
Interface Standard (nfpa)
NFPA T3.5.1 R2 D03
Max Backpressure T(y)
160 bar
Max Flow
50 l/min
Max Input Pressure
315 bar
Mounting Pattern
ISO 4401-03-02-0-05
Nominal Size
6
Pilot Oil Supply/return
Internal Supply, External Return
Pressure Reduction Port
A2
Pressure Stage (secondary)
210 bar
Seal Material
NBR
Viscosity Max
800 mm²/s
Weight
1.2 kg
1620 Old Apex Road
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