Bosch Rexroth | 4WEH16HD7XO6EG24N9ETK4B10
4WEH16HD7X/O6EG24N9ETK4/B10
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The 4WEH16HD7X/O6EG24N9ETK4/B10 valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series and directs hydraulic automation circuits by shifting pressure lines between work ports. It employs a 4/2-way flow pattern so pressure can be routed to either actuator port while maintaining a single return path. The unit is built in nominal size NG 16, which matches standardized subplates for mid-range flow rates. A spool symbol D defines the switching positions and overlap geometry used during transitions. The valve accepts up to 300 l/min to accommodate high-volume systems, and ports P, A, and B tolerate 350 bar while port T withstands 250 bar, enabling operation under demanding load conditions. Mounting follows the ISO 4401-07-07-0-05 pattern for quick interchangeability, and a 24 V DC supply energizes its solenoids for reliable actuation.
Its control spool is returned hydraulically, which eliminates external springs and allows smooth shifting under varying back-pressure. Both pilot supply and pilot return are internal, simplifying plumbing and reducing leak points. The internal Y return is rated for 210 bar during direct current operation, protecting the pilot section from over-pressure. Fluid cleanliness must not exceed ISO 4406(c) 20/18/15 so that the precision metering edges remain free of wear. A concealed manual override labeled N9 lets technicians move the spool during commissioning without removing protective covers. Electrical connection is provided through a DIN EN 175301-803 K4 interface for straightforward cable termination. Flow stability is aided by a Ø 1.0 mm throttle orifice option B10 placed in the pilot line.
Technical Specifications
Control Spool Return
Hydraulic
Electrical Connection
DIN EN 175301-803 K4
Flow Pattern
4/2-Way
Fluid Cleanliness
ISO 4406(c) 20/18/15
Manual Override
Concealed (N9)
Maximum Flow
300 l/min
Nominal Size
NG 16
Pilot Return Type
Internal (ET)
Pilot Return Y Internal Max
210 bar (DC)
Pilot Supply Type
Internal (ET)
Port P/a/b Max Pressure
350 bar
Port T Max Pressure
250 bar
Porting Pattern
ISO 4401-07-07-0-05
Spool Symbol
D
Supply Voltage
24 V DC
Throttle Orifice
Ø 1.0 mm (B10)
1620 Old Apex Road
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