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Bosch Rexroth | ZDR6DA1-4X25YM12

ZDR6DA1-4X/25YM/12

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The Bosch Rexroth ZDR6DA1-4X/25YM/12 is part of the ZDR Pressure Reducing Valves series. It features a rotary knob adjustment type and a nominal size of 6. The valve's maximum input pressure is 315 bar, with a pressure stage of 25 bar. It is designed to handle a maximum flow rate of 50 liters per minute. The unit uses an internal supply and external drain for pilot oil. Fluid compatibility is ensured with NBR seals and operation within a viscosity range from 10 to 800 mm²/s. Operating temperatures for fluids should be between -30 and 80 degrees Celsius, and it is rated for use with fluids up to ISO 4406 20/18/15 cleanliness. The porting pattern matches ISO 4401-03-02-0-05 and counter pressure at port T can reach up to 160 bar.

Technical Specifications

Adjustment Type
Rotary Knob

Check Valve
None

Fluid Cleanliness
ISO 4406 20/18/15

Fluid Temp Max (nbr)
80 C

Fluid Temp Min (nbr)
-30 C

Max Counter Pressure Port T(y)
160 bar

Max Flow
50 L/min

Max Input Pressure (a)
315 bar

Nominal Size
6

Pilot Oil
Internal Supply, External Drain

Porting Pattern
ISO 4401-03-02-0-05

Pressure Reduction Port
A

Pressure Stage
25 bar

Seal Material
NBR

Viscosity Max
800 mmb2/s

Viscosity Min
10 mmb2/s

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