Bosch Rexroth | 4WEH16D7X6EG24N9EK4B08
4WEH16D7X/6EG24N9EK4/B08
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The 4WEH16D7X/6EG24N9EK4/B08 valve is built by Bosch Rexroth and belongs to the WEH Directional Spool Valves series. It directs hydraulic flow to cylinders and motors in automated machinery. The valve size 16 pairs with the ISO 4401-07-07-0-05 mounting pattern, simplifying block design. A D-type spool establishes the connection paths and supports a rated flow of 250 l/min when the pressure at ports P, A, or B reaches 280 bar. Oil cleanliness must meet ISO 4406 20/18/15 to maintain switching reliability. The wet-pin solenoid is energized with 24 V DC and is wired through a DIN EN 175301-803 K4 plug. If electrical control is lost, a concealed manual override labeled N9 allows the operator to shift the spool mechanically. These features place the unit as a compact directional element for high-pressure circuits.
Pilot actuation is supplied internally, code E, so the control stage draws pressure from the main line without an extra hose, while the return flow is routed externally through port Y to limit back pressure in the pilot chamber. The pilot circuit tolerates up to 250 bar and still operates once a minimum of 14 bar is available in two-spool configurations. Port T handles tank pressure up to 250 bar, and port Y withstands 210 bar during dynamic events. A factory-installed 0.8 mm throttle insert identified as B08 restricts pilot flow to damp rapid shifts and reduce shock. Together these limits and flow controls allow the valve to function as a stable, high-duty directional element in pressurized hydraulic automation.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Electrical Connector
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (d, 280 Bar)
250 l/min
Max Pilot Pressure
250 bar
Max Pressure (p, A, B)
280 bar
Max Pressure Port T
250 bar
Max Pressure Port Y (dc)
210 bar
Min Pilot Pressure (2-spool)
14 bar
Pilot Oil Supply
Internal (E)
Pilot Return (y)
External
Porting Pattern
ISO 4401-07-07-0-05
Spool Symbol
D
Supply Voltage
24 V DC
Throttle Insert
Ø0.8 mm (B08)
Valve Size (ng)
16
1620 Old Apex Road
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