Bosch Rexroth | 4WEH16E7X6EW110N9ETK410B10D3
4WEH16E7X/6EW110N9ETK4/10/B10/D3
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The 4WEH16E7X/6EW110N9ETK4/10/B10/D3 directional spool valve is built by Bosch Rexroth for the WEH Directional Spool Valves series and directs hydraulic flow in automated machinery. With a nominal size of 16, it matches systems that use the ISO 4401-07-07-0-05 porting pattern for manifold installation. A maximum operating pressure of 280 bar on ports P, A, and B supports high-pressure circuits, while the pilot stage endures up to 250 bar so remote actuation remains stable. The spring-centered spool needs a minimum pilot pressure of 14 bar and a pilot flow of 35 l/min to complete each switch. Pilot return lines can carry up to 160 bar, allowing back-pressurized tanks without exceeding limits. A throttle insert with a 1.0 mm orifice can be added to moderate pressure surges during spool transitions.
The valve weighs 8.9 kg when equipped with two solenoids and the centering spring, which affects the bracket design for block mounting. System cleanliness must stay at ISO 4406 class 20/18/15 to safeguard the spool’s running fit. Nitrile seals admit fluid temperatures from −20 °C to +80 °C, covering most industrial oil ranges. A concealed manual override identified as N9 permits local spool actuation during setup or troubleshooting. Electrical power reaches the coils through a DIN EN 175301-803 type K4 connector, giving a standardized interface for wiring. Port T withstands up to 250 bar, so return flow can pass through counterbalance devices without overstressing the housing. A designated secondary pressure of 45 bar on the D3 port supports auxiliary pilot circuits that need limited pressure. Together these characteristics enable reliable directional control in hydraulic automation where variable load, elevated back pressure, and broad temperature ranges are encountered.
Technical Specifications
Cleanliness Class (iso 4406)
20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Hydraulic Fluid Temp Max (nbr)
+80 C
Hydraulic Fluid Temp Min (nbr)
-20 C
Manual Override
Concealed (N9)
Max Operating Pressure (p/a/b)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (et, Ac)
160 bar
Max Pressure Port T
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Pilot Flow For Switching
35 l/min
Porting Pattern
ISO 4401-07-07-0-05
Secondary Pressure (d3)
45 bar
Size (ng)
16
Throttle Insert Diameter
1.0 mm
Weight (2 Solenoids, Spring)
8.9 kg
1620 Old Apex Road
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