Bosch Rexroth | 4WEH16D7X6EG24N9ETK4B10
4WEH16D7X/6EG24N9ETK4/B10
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The 4WEH16D7X/6EG24N9ETK4/B10 directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and directs hydraulic flow in automated machinery. As a 4-way unit, it alternates pressure and return lines to two actuator ports, supporting bidirectional cylinder or motor control. The NG16 size establishes a passage area large enough for moderate flow while keeping the envelope compact. A mounting interface that follows ISO 4401-07-07-0-05 allows drop-in replacement on standardized subplates. Ports P, A, and B tolerate operating pressures up to 280 bar, and the pilot stage withstands 250 bar to ensure consistent spool shifting. Internal pilot actuation starts at 4.5 bar, letting the valve respond even on low-pressure standby loops. The solenoid requires a nominal 24 V DC supply, and a DIN EN 175301-803 plug streamlines electrical hookup. A concealed manual override enables manual positioning during commissioning or power loss while keeping the control face sealed against dirt.
Internal pilot oil supply and return simplify plumbing and reduce potential leak points, while the Y return line handles back-pressure up to 210 bar so tank circuit fluctuations do not hinder spool reset. A Ø1.0 mm throttle insert meters pilot flow to cushion spool movement and limit pressure spikes. The specified fluid cleanliness of ISO 4406 20/18/15 protects the tight spool-to-bore fit from abrasive wear and maintains precise metering edges. A maximum coating thickness of 100 µm provides corrosion resistance without interfering with sealing surfaces. The valve achieves an MTTFd of 100 years, offering a long statistical safety margin for safety-related systems. These features combine to make the 4WEH16D7X/6EG24N9ETK4/B10 suited for hydraulic automation tasks that demand compact installation, controlled pilot flow, and high tolerance to system pressures.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Coating Thickness (max)
100 µm
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (internal X)
4.5 bar
Mounting Interface
ISO 4401-07-07-0-05
Mttfd
100 years
Nominal Voltage
24 V DC
Pilot Oil Return
Internal (ET)
Pilot Oil Supply
Internal (ET)
Pilot Return Y Max Pressure (dc)
210 bar
Size
NG16
Throttle Insert
Ø1.0 mm (B10)
Valve Way Configuration
4-Way
1620 Old Apex Road
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