Bosch Rexroth | ZDR6DP2-4X75YM
ZDR6DP2-4X/75YM
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The ZDR6DP2-4X/75YM pressure reducing valve belongs to the ZDR Pressure Reducing Valves series and is produced by Bosch Rexroth for controlled hydraulic automation. It is built in size 6 so it matches standard NG6 manifold cavities, and its sandwich plate design allows simple stacking in a valve assembly. The porting pattern ISO 4401-03-02-0-05 aligns the mounting holes with common CETOP 03 layouts. Pressure reduction takes place in the P channel, and a secondary pressure rating of 75 bar defines the maintained outlet value. The unit accepts a 350 bar inlet, enabling use on high-pressure supply lines, while pilot oil is taken internally and returned externally through port Y to segregate pilot flow. A dedicated pressure-gauge connection aids commissioning and service checks.
The valve handles a maximum flow of 50 l/min, providing volume capacity without losing control accuracy. It tolerates up to 160 bar counter pressure at port Y, preventing malfunction when backpressure is present. Adjustment is performed with a sleeve that has a hexagon and a protective cap, giving precise setting while shielding the mechanism from debris. No check valve is fitted, so reverse flow must be managed elsewhere in the circuit. NBR seals ensure compatibility with mineral oils and moderate temperatures, and permitted hydraulic fluids include HL, HLP, HLPD, and HFC types for application flexibility. Installation is possible in any orientation, simplifying layout in compact manifolds, and a cleanliness class of ISO 4406 (C) 20/18/15 is required to protect internal surfaces from wear.
Technical Specifications
Adjustment Element
Sleeve With Hexagon And Protective Cap
Check Valve
None (M)
Cleanliness Class
ISO 4406 (C) 20/18/15
Design
Sandwich Plate
Hydraulic Fluids
HL, HLP, HLPD, HFC
Installation Position
Any
Max Flow
50 l/min
Max Operating Pressure (input)
350 bar
Max T(y) Counter Pressure
160 bar
Pilot Oil
Internal Supply, External Return (Y)
Porting Pattern
ISO 4401-03-02-0-05
Pressure Gauge Connection
Yes
Pressure Reduction Channel
P
Seal Material
NBR
Secondary Pressure Rating
75 bar
Size
6
1620 Old Apex Road
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