Bosch Rexroth | ZDR-6-DP2-43Y150YM
ZDR 6 DP2-43Y/150YM
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The ZDR 6 DP2-43Y/150YM valve belongs to the ZDR Pressure Reducing Valves series and is manufactured by Bosch Rexroth for hydraulic automation circuits that require stabilized downstream pressure. The unit is direct operated, so the control spool responds to line pressure without a separate pilot stage. Its nominal size is 6, and it installs as a sandwich plate in stacks that follow the ISO 4401-03-02-0-05 port pattern. Pilot oil is supplied internally, while return oil discharges through external port T(Y), allowing an independent tank line. Pressure is reduced at port P1 and can be set up to 150 bar. The setting is changed with a sleeve that has a hexagon and cap, which accepts a wrench for precise adjustment.
The valve accommodates inlet pressure up to 350 bar and passes a maximum flow of 50 L/min without exceeding its design limits. Back pressure at port T(Y) may reach 160 bar, permitting long return runs. Mounting screws must be tightened to 8.9 Nm to secure the sandwich stack. NBR seals contain the fluid and resist common hydraulic oils, while system cleanliness must meet ISO 4406 (C) 20/18/15 to avoid spool sticking. The design omits a check valve, so reverse flow must be handled externally. These parameters combine to define the valve’s operating envelope and ensure consistent pressure reduction in automated machinery.
Technical Specifications
Adjustment Element
Sleeve With Hexagon And Cap
Check Valve
None
Cleanliness Class
ISO 4406 (C) 20/18/15
Fixing Screw Tightening Torque
8.9 Nm
Max Back Pressure T(y)
160 bar
Max Flow
50 L/min
Max Operating Pressure (inlet)
350 bar
Mounting Type
Sandwich Plate
Nominal Size
6
Operation
Direct Operated
Pilot Oil Return
External (T(Y))
Pilot Oil Supply
Internal
Port Pattern
ISO 4401-03-02-0-05
Pressure Reduction Port
P1
Seals
NBR
Secondary Pressure Max
150 bar
1620 Old Apex Road
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