Bosch Rexroth | 4WEH16E7X6EG24N9ETK410B10
4WEH16E7X/6EG24N9ETK4/10B10
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The 4WEH16E7X/6EG24N9ETK4/10B10 directional valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It shifts hydraulic oil to selected work ports in automated machines. The unit carries a nominal size of 16 so its flow galleries match ISO 07 interface plates. Three spool positions allow forward, reverse, and neutral functions, while the E spool profile establishes the specific flow paths in each state. A spring-centered return recenters the spool when pilot pressure is removed, ensuring de-energized neutrality. Internal pilot oil supply and return simplify plumbing because no external drain or feed lines are needed. The porting pattern follows ISO 4401-07-07-0-05, enabling direct mounting to standardized sub-plates. Electrical actuation is handled through a DIN EN 175301-803 K4 connector operating at 24 V DC, which supports common industrial wiring practices. Under these conditions the valve passes up to 300 l/min, meeting the flow demands of mid-range hydraulic drives.
The pressure capabilities support reliable shifting in high-duty circuits. Ports P, A, and B tolerate operating pressures to 280 bar, allowing the valve to control cylinders and motors that work near standard system limits. Pilot supply can reach 250 bar, so the operator stage remains responsive even on high-pressure lines. For spring-centered models the spool moves with a minimum pilot pressure of 14 bar, which defines the lowest signal pressure for fail-safe motion. Pilot return paths inside the housing withstand 210 bar on direct-current operation to prevent back-pressure induced sticking. Switching volume for a three-position spring valve is 5.72 cm³, information useful for sizing accumulators in fast sequences. Clean oil to ISO 4406 20/18/15 maintains spool clearances and extends service life. A throttle insert of 1.0 mm (code B10) can be fitted in port B to dampen surges and refine response during rapid reversals.
Technical Specifications
Control Spool Return
Spring-Centered
Electrical Connection
DIN EN 175301-803 (K4)
Fluid Cleanliness Class
ISO 4406 20/18/15
Max Flow (ng16, Symbol E)
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pressure (pilot Return, Internal)
210 bar (DC)
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure (3-pos, Spring)
14 bar
Nominal Size (ng)
16
Pilot Oil Supply/return
Internal (ET)
Pilot Volume (switching, 3-pos Spring)
5.72 cm³
Porting Pattern
ISO 4401-07-07-0-05
Spool Positions
3
Spool Symbol
E
Supply Voltage
24 V DC
Throttle Insert
Ø 1.0 mm (B10)
1620 Old Apex Road
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