Bosch Rexroth | ZDR6DP2-4X25YMV
ZDR6DP2-4X/25YMV
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The ZDR6DP2-4X/25YMV valve belongs to the ZDR Pressure Reducing Valves series and is produced by Bosch Rexroth to maintain stable downstream pressure in hydraulic automation circuits. An adjustment sleeve with a hexagon and protective cap lets technicians set the reduced pressure precisely while shielding the mechanism from accidental movement. Size 6 defines compact port geometry suited to small manifolds, and the ISO 4401-03-02-0-05 mounting interface aligns with standard subplates for quick replacement. Pilot oil is drawn internally and returned externally, isolating control flow from tank pressure and improving response. Pressure reduction occurs in channel P, and the outlet is limited to 25 bar to protect low-pressure branches. The housing tolerates 350 bar on the inlet side, and FKM seals provide chemical resistance.
This model is supplied without a check valve, so reverse flow must be handled by separate components. Acceptable media include HL, HLP, HLPD, HETG, HEES, HEPG, HFDU, HFDR, and HFC, giving latitude with mineral, synthetic, or water-glycol fluids. System cleanliness must reach ISO 4406 20/18/15 to avoid spool seizure. Counter pressure at port T(y) may reach 160 bar, enabling installation in return lines that carry moderate back pressure. The design accommodates a maximum flow of 50 l/min, making it suitable for medium-capacity actuators. A G1/4 pressure gauge port allows direct monitoring of the regulated side. Operable viscosity spans from 10 mm²/s to 800 mm²/s, ensuring dependable performance from cold start through high-temperature operation.
Technical Specifications
Adjustment Type
Sleeve With Hexagon And Protective Cap
Check Valve
None
Fluid Cleanliness
ISO 4406 20/18/15
Hydraulic Fluids
HL,HLP,HLPD,HETG,HEES,HEPG,HFDU,HFDR,HFC
Max Counter Pressure Port T(y)
160 bar
Max Flow
50 l/min
Max Operating Pressure (input)
350 bar
Mounting Interface
ISO 4401-03-02-0-05
Pilot Oil
Internal Supply, External Return
Pressure Gauge Port
G1/4
Pressure Reduction Channel
P
Seal Material
FKM
Secondary Pressure Rating
25 bar
Size
6
Viscosity Max
800 mm²/s
Viscosity Min
10 mm²/s
1620 Old Apex Road
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