Bosch Rexroth | 4WEH16Q726EG24N9ETK4B10
4WEH16Q72/6EG24N9ETK4/B10
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The 4WEH16Q72/6EG24N9ETK4/B10 valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for hydraulic automation circuits that need electrically directed flow. It uses a Q-type three-position spool within a four-way body, so actuators receive forward, neutral, or reverse flow paths as required. The unit mounts on an ISO 4401-07-07-0-05 subplate and matches nominal size NG16 passages for consistent port alignment. A 24 V DC solenoid connects through a DIN EN 175301-803 plug, and a concealed manual override allows local shifting during service. An internal pilot oil return channels control oil to tank inside the housing, while a 1.0 mm throttle insert orifice can be installed to smooth pressure transitions. With the Q spool fitted, the maximum flow is held to 300 L/min to maintain stable metering across the lands.
An internal pilot oil supply feeds the control stage, eliminating external pressure lines and engaging once system pressure reaches the 14 bar minimum required by the spring-centered design. The pilot circuit withstands up to 250 bar, and the main P, A, and B ports operate continuously at 280 bar, whereas the T port is limited to 210 bar when the return is internal on direct-current builds. Fluid cleanliness must stay at ISO 4406 code 20/18/15 to protect the spool and bore from abrasion, helping the valve survive high-cycle industrial or mobile service. These pressure, contamination, and supply features define the operating window and ensure reliable shifting while the mounting and flow attributes detailed earlier handle port integration and circuit throughput.
Technical Specifications
Cleanliness Class (iso 4406)
20/18/15
Connector Standard
DIN EN 175301-803
Flow Limit (spool Q)
300 l/min
Manual Override
Concealed
Max Pilot Pressure
250 bar
Max Port P/a/b Pressure
280 bar
Max Port T Pressure (internal Return)
210 bar (DC)
Min Pilot Pressure (spring-centered)
14 bar
Nominal Size
NG16
Nominal Voltage
24 V DC
Pilot Oil Return
Internal
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-07-07-0-05
Spool Type
Q (3-Position)
Throttle Insert Orifice
1.0 mm
Way Configuration
4-Way
1620 Old Apex Road
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