Bosch Rexroth | ZDB10VP1-4X315
ZDB10VP1-4X/315
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The ZDB10VP1-4X/315 pressure relief valve belongs to the ZDB Pressure Relief Valves series and is produced by Bosch Rexroth for hydraulic automation where over-pressure must be diverted to tank. It is a pilot-operated pressure relief valve that employs a sandwich plate layout so it can be inserted between sub-plates without extra piping. Flow is relieved from port P to port T, and the required opening point is adjusted with a rotary knob, allowing field tuning without tools. The assembly tolerates counter pressure up to 40 bar in the return line while safeguarding circuits that operate as high as 315 bar. Users may set the relief point anywhere up to the same 315 bar ceiling, giving the valve flexibility across machine platforms.
It operates in ambient temperatures from ‑20 °C to 80 °C and permits hydraulic fluid temperatures within the identical ‑20 °C to 80 °C span, so cabinet heating or cooling is usually unnecessary. Proper function is maintained with mineral oils classified HL, HLP, HLPD, HVLP, or HVLPD, provided the viscosity stays between 10 and 800 mm²/s. NBR seals are fitted to resist these media and the stated temperature window. System cleanliness must reach ISO 4406 class 20/18/15 to prevent premature wear of pilot stages. These fluid and environmental limits ensure stable relief behavior and long service life when the valve is stacked inside modern manifold blocks.
Technical Specifications
Adjustment Type
Rotary Knob
Ambient Temp Max (nbr)
80 C
Ambient Temp Min (nbr)
-20 C
Cleanliness Class
ISO 4406 (c) 20/18/15
Design
Sandwich Plate Valve
Hydraulic Fluid
Mineral Oils HL/HLP/HLPD/HVLP/HVLPD
Hydraulic Fluid Temp Max (nbr)
80 C
Hydraulic Fluid Temp Min (nbr)
-20 C
Kinematic Viscosity Max
800 mm²/s
Kinematic Viscosity Min
10 mm²/s
Max Counter Pressure
40 bar
Max Operating Pressure
315 bar
Relief Direction
P–T
Seal Material
NBR
Set Pressure (max)
315 bar
Valve Type
Pilot-Operated Pressure Relief
1620 Old Apex Road
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