Bosch Rexroth | 4WEH16G7X6EG24N9K4B08P4-5
4WEH16G7X/6EG24N9K4/B08P4 5
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The 4WEH16G7X/6EG24N9K4/B08P4 5 valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for hydraulic automation where reliable flow switching is required. A size NG16 body provides passage dimensions suited to medium-frame manifolds, and the ISO 4401-07-07-0-05 porting pattern lets the unit mount on standard sub-plates without re-machining. The solenoid system runs on a coil voltage of 24 V DC so it can be connected directly to common control cabinets, while a DIN EN 175301-803 K4 connector streamlines electrical hookup. Maximum operating pressure on ports p, a, and b reaches 280 bar, enabling the spool to route high-pressure pump flow to actuators. Fluid cleanliness must remain within ISO 4406(c) 20/18/15 to prevent spool erosion and sticking. The valve body weighs 8.9 kg, a mass that supports rigid seating under load. A preload valve cracking pressure of 4.5 bar ensures the pilot stage opens only after the supply reaches the threshold, avoiding premature actuation.
Hydraulic control of the pilot stage is defined by a required pilot flow of 35 l/min for the shortest switching time and a performance limit flow of 210 l/min at 280 bar on gallery g, balancing response speed with energy loss. The pilot circuit tolerates up to 250 bar, while spring-centered operation needs at least 14 bar to shift the spool reliably. Return lines can carry 250 bar on port t and 210 bar on port y (for DC service) so back pressure in tank circuits does not hinder movement. A throttle insert with a 0.8 mm orifice (code B08) meters pilot oil to damp pressure spikes during reversal. Correct installation torque for the mounting screws is 58 Nm, securing the body against seal extrusion when full pressure is applied.
Technical Specifications
Cleanliness Class
ISO 4406(c) 20/18/15
Coil Voltage
24 V DC
Electrical Connection
DIN EN 175301-803 (K4)
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (y)
210 bar (DC)
Max Return Pressure (t)
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Screw Torque
58 Nm
Performance Limit Flow (g, 280 Bar)
210 l/min
Pilot Flow For Shortest Switching Time
35 l/min
Porting Pattern
ISO 4401-07-07-0-05
Preload Valve Cracking Pressure
4.5 bar
Size
NG16
Throttle Insert
Ø 0.8 mm (B08)
Weight (two Solenoids, Spring-centered)
8.9 kg
1620 Old Apex Road
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