Bosch Rexroth | ZDR6DA2-4X150YM12
ZDR6DA2-4X/150YM/12
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The ZDR6DA2-4X/150YM/12 valve belongs to the ZDR Pressure Reducing Valves series and is manufactured by Bosch Rexroth for hydraulic automation circuits that require controlled secondary pressure. It is direct-operated so the main spool reacts quickly to pilot pressure changes. Nominal size 6 keeps the unit compact, and the sandwich plate mounting style lets it be inserted between manifold blocks. The porting pattern follows ISO 4401-03-02-0-05, while the matching NFPA interface is T3.5.1 R2 D03 so alignment with standard subplates is straightforward. Pressure is reduced in port A, and four M5-10.9 screws clamp the assembly firmly. A sleeve with a hexagon protective cap covers the adjustment screw to prevent unintended setting changes.
The valve holds downstream pressure to a maximum of 150 bar, and the inlet can see operating pressures up to 315 bar. Port T may carry up to 160 bar of back pressure without affecting function. The design accommodates flow rates up to 50 l/min for medium-capacity lines. Pilot oil is taken internally and drained externally, which limits pilot pressure buildup. A G1/4 gauge port allows service personnel to read the regulated pressure directly. Hydraulic fluid must meet cleanliness class ISO 4406 20/18/15 to preserve spool accuracy, and no check valve is integrated, so reverse flow must be managed with external components.
Technical Specifications
Adjustment Type
Sleeve with Hexagon Protective Cap
Check Valve
None (M)
Cleanliness Class
ISO 4406 20/18/15
Max Back Pressure Port T(y)
160 bar
Max Flow
50 l/min
Max Operating Pressure (a)
315 bar
Mounting Screws
4×M5-10.9
Mounting Type
Sandwich Plate
Nfpa Porting
T3.5.1 R2 D03
Nominal Size
6
Pilot Supply/return
Internal/External (Y)
Porting Pattern
ISO 4401-03-02-0-05
Pressure Gauge Port
G1/4
Pressure Reduction Port
A
Secondary Pressure (max)
150 bar
Valve Type
Direct-Operated Pressure Reducing
1620 Old Apex Road
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