Bosch Rexroth | Z2DB6VD2-4X315V
Z2DB6VD2-4X/315V
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The Z2DB6VD2-4X/315V valve belongs to the ZDB Pressure Relief Valves series from Bosch Rexroth and is installed in hydraulic automation to limit line pressure and protect downstream components. It is built in size 6 and contains two cartridges, so both flow paths are protected within a compact block. Relief is provided in both directions between ports A and B, ensuring bidirectional safety. The unit tolerates a maximum operating pressure of 315 bar, and the setting can be adjusted up to the same 315 bar by means of a sleeve with a hexagon and a protective cap that shields the adjustment point. A porting pattern of ISO 4401-03-02-0-05 matches standard subplates for this size, and the design carries up to 60 l/min without excessive pressure rise.
Hydraulic fluid supplied to the valve must meet cleanliness class ISO 4406 20/18/15 to prevent spool scoring. Because no corrosion protection is applied, the housing should be mounted in dry or coated environments when moisture is present. The body is machined without a locating hole, so it seats flush on the manifold surface. Counter pressure on the return line can reach 40 bar without impairing relief accuracy. Reliable operation is maintained from -15 °C to 80 °C, covering typical cold-start and full-load temperatures. A mounting surface finish of Rz1max 8 supports proper gasket compression, and FKM seals provide chemical and thermal resistance at the stated limits.
Technical Specifications
Adjustment Type
Sleeve With Hexagon And Protective Cap
Cleanliness Class
ISO 4406 20/18/15
Corrosion Protection
None
Locating Hole
None
Maximum Counter Pressure
40 bar
Maximum Flow
60 l/min
Maximum Hydraulic Fluid Temp
80 °C
Maximum Operating Pressure
315 bar
Maximum Set Pressure
315 bar
Minimum Hydraulic Fluid Temp
-15 °C
Mounting Surface Roughness
Rz1max 8
Number Of Cartridges
2
Porting Pattern
ISO 4401-03-02-0-05
Relief Function
A–B And B–A
Seal Material
FKM
Size
6
1620 Old Apex Road
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