Bosch Rexroth | DBAW25BF2-2X50-6EG24N9K4
DBAW25BF2-2X/50-6EG24N9K4
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The DBAW25BF2-2X/50-6EG24N9K4 pump safety block is part of the DBA Pump Safety Blocks series produced by Bosch Rexroth. It serves as a combined pressure-relief and directional unit that protects hydraulic pumps in automated systems. The NG 25 size establishes passage dimensions suitable for medium to high flow volumes, while a maximum operating pressure of 350 bar at port P lets the block resist typical pump outlet pressures. A fixed set pressure limit of 50 bar triggers unloading in low-pressure standby cycles, and the normally open valve orientation guarantees immediate flow when power is lost. The directional section follows the 6E code, which assigns spool geometry for rapid switching. A 24 V DC solenoid actuates the valve to integrate with common machine control voltages. Pressure is adjusted through a hex sleeve with cap, enabling tamper-resistant field setting. A concealed manual override labeled N9 allows service personnel to shift the spool without electrical power during commissioning or maintenance.
The safety block passes up to 400 l/min, supporting large displacement pumps without excessive pressure drop, and withstands 210 bar counter-pressure at port T so return lines can be routed through back-pressure filters. Standard F-type SAE flanges provide straightforward mounting to pump manifolds. Electrical connection is via a DIN EN 175301-803 form K4 plug, ensuring quick replacement and sealed wiring. NBR seals contain mineral-based hydraulic fluids and preserve compatibility with widely used oils. Required fluid cleanliness is ISO 4406 class 20/18/15, specifying particle limits that prevent spool sticking and seat erosion. The block may be installed in any position, which simplifies layout in crowded power units. Despite its rugged construction, the assembly weighs only 6.1 kg, allowing single-person handling during installation and service.
Technical Specifications
Directional Valve Code
6E
Electrical Connection
DIN EN 175301-803 (K4)
Fluid Cleanliness
ISO 4406 20/18/15
Installation Position
Any
Manual Override
Concealed (N9)
Max Counter Pressure (port T)
210 bar
Max Flow
400 l/min
Max Operating Pressure (port P)
350 bar
Pressure Adjustment
Hex Sleeve With Cap (2)
Sae Flange Type
F (standard)
Seal Material
NBR
Set Pressure Limit
50 bar
Size (ng)
25
Solenoid Voltage
24 V DC
Valve Orientation
Normally Open (B)
Weight
6.1 kg
1620 Old Apex Road
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