Bosch Rexroth | 4WEH16D7X6EW110N9ETDK23LB08
4WEH16D7X/6EW110N9ETDK23L/B08
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The 4WEH16D7X/6EW110N9ETDK23L/B08 directional spool valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series. Designed to route pressurized fluid in hydraulic automation circuits, the unit relies on electro-hydraulic actuation so an electrical signal moves the spool by way of pilot oil. Its 4/2-way function provides two distinct flow states for cylinders or motors, while spool symbol D establishes the specific cross-connection pattern in each position. A nominal size 16 supports medium-frame manifolds, and the porting pattern ISO 4401-07-07-0-05 permits direct mounting to standard sub-plates. The valve handles system pressures up to 280 bar on ports P, A, and B, and passes a maximum flow of 250 l/min at that pressure, matching high-demand mobile or industrial drives. These characteristics give the component the capacity to switch large volumes quickly without exceeding mechanical limits.
The control section is returned to its neutral state by a spring, eliminating the need for external resetting devices. A concealed manual override (code N9) allows maintenance staff to shift the spool locally when electrical power is unavailable. Pilot commands are generated by the integrated 4WE6 6E valve, and both pilot supply and pilot return are internal, simplifying manifold plumbing. Fast response is supported by a pilot flow of 35 l/min, while a throttle insert with a 0.8 mm orifice (B08) meters the signal to prevent pressure shocks. The pilot circuit operates reliably between 14 bar minimum and 250 bar maximum, covering most standard control pressure ranges. To protect precision clearances, hydraulic fluid must meet cleanliness class ISO 4406 20/18/15 before entering the valve.
Technical Specifications
Actuation
Electro-Hydraulic
Cleanliness Class
ISO 4406 (c) 20/18/15
Control Spool Return
Spring Return
Manual Override
Concealed (N9)
Max Operating Pressure (p/a/b)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure
14 bar
Nominal Size
16
Pilot Control Valve
4WE6 6E
Pilot Flow For Fast Switching
35 l/min
Pilot Oil Supply/return
Internal/Internal (ET)
Porting Pattern
ISO 4401-07-07-0-05
Qv Max At 280 Bar (symbol D)
250 l/min
Spool Symbol
D
Throttle Insert
Ø0.8 mm (B08)
Way Function
4/2-Way
1620 Old Apex Road
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