Bosch Rexroth | Z2DB6VC3-4X50V
Z2DB6VC3-4X/50V
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The Z2DB6VC3-4X/50V valve from Bosch Rexroth belongs to the ZDB Pressure Relief Valves series and serves to limit hydraulic pressure in automated circuits. It is a pilot-operated pressure relief model built as a sandwich plate valve with size 6 interfaces, allowing direct stacking between subplates and directional valves. The porting pattern follows ISO 4401-03-02-0-05 so plate layouts remain consistent across manifolds. Two valve cartridges handle parallel channels, and the direction of action covers A-T and B-T lines to protect both service ports. Pressure adjustment is made through a lockable rotary knob with a scale, enabling repeatable setting without unintentional change. The rated pressure is 50 bar, while the permitted operating limit reaches 315 bar to cope with peak levels during machine cycles. An external pilot oil drain toward port T prevents back pressure from influencing the pilot stage.
For reliable performance the unit accepts system flow rates up to 60 l/min without exceeding differential limits. Counter pressure at port T may reach 40 bar before function is affected, ensuring stable relief even in return circuits with moderate backpressure. The valve body is sealed with FKM elastomers, making it compatible with common mineral oils and some synthetic fluids. Installation can be in any orientation, simplifying layout inside compact power units. Mounting screws must be tightened to 50 Nm on the hexagon heads to keep the sandwich stack leak-free under full load. Fluid entering the valve should meet ISO 4406 cleanliness class 20/18/15 to avoid erosive wear on the pilot and main poppets. Together these parameters frame the allowable operating envelope and support consistent pressure limitation in industrial hydraulic systems.
Technical Specifications
Adjustment Type
Lockable Rotary Knob With Scale
Cleanliness Class
ISO 4406 20/18/15
Direction Of Action
A-T And B-T
Hexagon Tightening Torque
50 Nm
Installation Position
Any
Maximum Counter Pressure
40 bar
Maximum Flow
60 l/min
Maximum Operating Pressure
315 bar
Pilot Oil Drain
External To T
Porting Pattern
ISO 4401-03-02-0-05
Pressure Rating
50 bar
Seal Material
FKM
Size
6
Type Of Connection
Sandwich Plate Valve
Valve Cartridges
2
Valve Type
Pressure Relief, Pilot-Operated
1620 Old Apex Road
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