Bosch Rexroth | ZDBT-XP8-1X160-081VV06P100N502H-A0-HIGH
ZDBT-XP8-1X/160 081VV06P100N502H-A0-HIGH
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The ZDBT-XP8-1X/160 081VV06P100N502H-A0-HIGH valve is part of the ZDB Pressure Relief Valves series manufactured by Bosch Rexroth for hydraulic automation circuits that require controlled pressure limitation. It is pilot-operated, enabling stable relief behavior even when system pressure fluctuates. The sandwich plate connection lets the unit be inserted between manifold layers without additional piping. Size 6 dimensions match the ISO 4401-03-02-0-05 porting pattern so installation interfaces are standardized across machines. The assembly tolerates a maximum operating pressure of 315 bar, and the adjustable spring stack allows the set pressure to be tuned up to the same 315 bar limit to suit individual system requirements. During service the valve handles flow rates as high as 60 l/min, giving sufficient capacity for medium-size actuator groups. Return-line counter pressures up to 40 bar are permitted, preventing premature opening when backpressure develops in the tank circuit.
Permissible ambient conditions support varied machine environments; versions with FKM seals operate from −15 °C to +80 °C, while NBR-sealed versions widen the low-temperature threshold to −20 °C but share the same +80 °C upper limit. Hydraulic media must stay between 10 mm²/s and 800 mm²/s in viscosity to maintain predictable damping in the pilot stage. System cleanliness is restricted to ISO 4406 (c) 20/18/15 so the internal orifices remain free of debris. The valve can be mounted in any orientation, which simplifies layout inside compact power units or stacked control banks. Observing these limits on temperature, fluid quality, viscosity, and mounting freedom keeps the pilot poppet stable and prevents chatter under dynamic load.
Technical Specifications
Ambient Temp Max (fkm)
+80 °C
Ambient Temp Max (nbr)
+80 °C
Ambient Temp Min (fkm)
-15 °C
Ambient Temp Min (nbr)
-20 °C
Cleanliness Class
ISO 4406 (c) 20/18/15
Connection Type
Sandwich Plate
Installation Position
Any
Maximum Counter Pressure
40 bar
Maximum Flow
60 l/min
Maximum Operating Pressure
315 bar
Maximum Set Pressure
315 bar
Porting Pattern
ISO 4401-03-02-0-05
Size
6
Valve Type
Pressure Relief (Pilot-Operated)
Viscosity Maximum
800 mm²/s
Viscosity Minimum
10 mm²/s
1620 Old Apex Road
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