Bosch Rexroth | 4WEH16HD7XOF6EG96N9ES2K4
4WEH16HD7X/OF6EG96N9ES2K4
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The 4WEH16HD7X/OF6EG96N9ES2K4 valve is part of the WEH Directional Spool Valves series from Bosch Rexroth and is used to route pressurized fluid in automated hydraulic circuits. Actuation is electro-hydraulic, so a solenoid-driven pilot shifts the main spool without direct mechanical force. The nominal size NG16 defines the flow section for medium-capacity lines, while two spool positions provide a pair of discrete flow states for machine functions. End positions are achieved hydraulically, eliminating mechanical locks. Pilot oil can be supplied internally or returned externally under the E option, and the pilot stage operates between a minimum of 14 bar and a maximum of 250 bar. The main ports p, a, and b withstand up to 350 bar, allowing use in high-pressure systems. A porting pattern of ISO 4401-07-07-0-05 matches standard subplates, simplifying manifold design.
This valve mounts on a subplate, secured by four M10 × 60 screws that must be tightened to 58 Nm to prevent distortion. Fluid cleanliness must meet ISO 4406 code 20/18/15 to keep the sliding spool free from abrasive wear. Electrical energization is through a DIN EN 175301-803 K4 connector, providing a sealed interface for the solenoid coil. Switching time can be tuned with the S2 discharge restrictor to match system dynamics. The design attains an MTTFd of 100 years, supporting long safety life calculations in machinery risk assessments.
Technical Specifications
Actuation
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
End Position
Hydraulic
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (hydraulic End)
14 bar
Mounting
Subplate
Mounting Screws
4x M10 x 60
Mttfd
100 years
Pilot Oil Supply/return
Internal/External (E)
Porting Pattern
ISO 4401-07-07-0-05
Screw Torque (m10)
58 Nm
Size
NG16
Spool Positions
2
Switching Time Adjustment
S2 (Discharge)
1620 Old Apex Road
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