Bosch Rexroth | 4WEH16HD7XOF6EG24N9S2K4
4WEH16HD7X/OF6EG24N9S2K4
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The 4WEH16HD7X/OF6EG24N9S2K4 valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth and is used to direct flow in hydraulic automation systems. Valve size NG16 defines the mounting face and keeps it interchangeable with other size-16 components, while the ISO 4401-07-07-0-05 porting pattern aligns the body with standard subplates. A 4/2-way layout supplies two shifting positions for four working ports, matching common cylinder control tasks. The unit withstands operating pressures up to 280 bar, and a maximum flow of 300 l/min supports fast actuator movement with limited pressure loss. Spool return is hydraulic, so pilot oil repositions the spool when the command is removed. Internal pilot oil supply removes the need for an external feed, and external pilot oil return channels pilot flow separately to tank so main line pressure does not influence the control stage.
The solenoid operates on 24 V DC, and a DIN EN 175301-803 K4 plug gives a standardized electrical interface for rapid wiring. A concealed manual override marked N9 lets technicians shift the spool locally while shielding the pushbutton from unintended activation. Pilot control passages accept pressures up to 250 bar, and the pilot return circuit can hold 210 bar in DC installations, allowing remote return routing without undue restriction. At least 14 bar is required at the pilot inlet to move the main spool, guaranteeing reliable switching during low-pressure start-up. Hydraulic fluid cleanliness must reach ISO 4406 20/18/15 to guard the precision edges and sustain long-term performance. Combined, these limits and interface details enable dependable integration of the valve into automated hydraulic machinery.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Control Spool Return
Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (y)
210 bar (DC)
Min Pilot Pressure
14 bar
Pilot Oil Return
External (Y)
Pilot Oil Supply
Internal (E)
Porting Pattern
ISO 4401-07-07-0-05
Supply Voltage
24 V DC
Valve Size
NG16
Way/positions
4/2-Way
1620 Old Apex Road
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