Bosch Rexroth | 4WEH16W7X6EG24N9ETK4B12
4WEH16W7X/6EG24N9ETK4/B12
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The 4WEH16W7X/6EG24N9ETK4/B12 directional spool valve belongs to the WEH Directional Spool Valves series produced by Bosch Rexroth. It directs oil in hydraulic automation circuits through a 4-way spool sized for NG16 cavities, giving machines a standardized flow path for extension and retraction cycles. The body mounts on manifolds using the ISO 4401-07-07-0-05 interface so it can be swapped without re-machining ports. Command signals reach a 6E high-power pilot stage supplied and returned internally, an ET arrangement that removes external pilot lines. The pilot solenoid is energized with 24 V DC, and the K4 connector under DIN EN 175301-803 speeds coil replacement. A concealed N9 manual override permits technicians to shift the spool during commissioning or power loss, and stable actuation is achieved when the pilot line maintains at least 14 bar.
The main W spool manages up to 300 l/min while ports P, A, and B tolerate 280 bar, the internal pilot return is limited to 210 bar, and the tank port withstands 250 bar, matching common mid-pressure systems. A throttle insert with a 1.2 mm orifice, coded B12, tempers flow surges to reduce shock during direction changes. Fluid cleanliness must meet ISO 4406 20/18/15 so the precision lands retain their sealing edge. With two solenoids the assembly weighs 8.9 kg, allowing direct mounting on sub-plates without extra supports. These flow, pressure, and contamination limits work together to deliver reliable motion control across repeated duty cycles.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Coil Voltage
24 V DC (G24)
Electrical Connection
K4 (DIN EN 175301-803)
Manual Override
Concealed (N9)
Max Flow (ng16, W, 3-spool)
300 l/min
Max Pressure (p, A, B)
280 bar
Max Pressure (pilot Return Y Int.)
210 bar
Max Pressure (t Port)
250 bar
Min Pilot Pressure (3-spool)
14 bar
Mounting Interface
ISO 4401-07-07-0-05
Pilot Valve Type
6E High-Power
Pilot Variant
Internal Supply, Internal Return (ET)
Size
NG16
Throttle Insert
Ø 1.2 mm (B12)
Way Configuration
4-Way
Weight (2 Solenoids)
8.9 kg
1620 Old Apex Road
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