Bosch Rexroth | 4WEH16Q7X6EG24N9ETK4B10
4WEH16Q7X/6EG24N9ETK4/B10
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The 4WEH16Q7X/6EG24N9ETK4/B10 directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow to actuators in automated machinery. Its nominal size NG16 sets passage dimensions suitable for medium-frame manifolds. A mounting interface to ISO 4401-07-07-0-05 permits direct subplate installation. The Q-pattern spool offers three positions, enabling forward, reverse, and center functions within one body. Up to 300 l/min can pass through the NG16 flow paths, supporting rapid cycle equipment. Ports P, A, and B tolerate operating pressures to 280 bar for compatibility with high-pressure power units. Each solenoid runs on 24 V DC and connects through a DIN EN 175301-803 K4 plug, simplifying electrical hookup. Internal pilot supply and return eliminate external lines, while a minimum pilot pressure of 14 bar is required for reliable shifting.
The pilot circuit endures pressures up to 250 bar, safeguarding components during pressure spikes. A 1.0 mm throttle insert in the pilot channel moderates flow and smooths spool movement. When centered, the valve leaves a 32 mm² path from the service lines to tank, reducing unintended actuator drift. Oil cleanliness must reach ISO 4406 (c) 20/18/15 to protect the precision spool fit. Acceptable fluid viscosity spans 2.8 to 500 mm²/s, allowing reliable operation from cold start to full temperature. Together, these parameters maintain consistent response times across varying operating conditions. They also support long service life within industrial hydraulic automation.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Coil Voltage
24 V DC
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow (ng16, Spool Q)
300 l/min
Maximum Operating Pressure (p,a,b)
280 bar
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure
14 bar
Mounting Interface
ISO 4401-07-07-0-05
Nominal Size
NG16
Pilot Supply/return
Internal/Internal (ET)
Spool Positions
3
Spool Symbol
Q
Throttle Insert Diameter
1.0 mm
Viscosity Range
2.8 to 500 mm²/s
Zero-position Flow Area (a-t,b-t)
32 mm²
1620 Old Apex Road
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