Bosch Rexroth | 4WEH22H7X6EG24N9ETSK4B10P70D3
4WEH22H7X/6EG24N9ETSK4/B10P7.0D3
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The 4WEH22H7X/6EG24N9ETSK4/B10P7.0D3 valve is manufactured by Bosch Rexroth as part of the WEH Directional Spool Valves series. It directs hydraulic flow in automated machinery through a pilot-operated spool. The valve size is classified as NG25, establishing the flow range and mounting footprint. Its subplate interface follows porting pattern ISO 4401-08-08-0-05 for straightforward block installation. Ports P, A, and B can be loaded up to 350 bar, while the pilot stage must not exceed 210 bar. Pilot oil is taken internally from port P via channel X, and it returns internally to tank through port T, which eliminates external lines. Securing the shortest possible switching time requires a pilot flow of 35 l/min, supporting rapid direction changes under load.
Electrical actuation is handled by a 24 V DC supply that powers the pilot solenoid, and the connection is made through a DIN EN 175301-803 K4 plug installed at the housing end. A concealed manual override designated N9 lets maintenance personnel shift the spool without electrical power during setup or fault recovery. The pilot circuit contains a 1.0 mm throttle orifice that moderates oil flow and smooths spool movement. An internal pressure-reducing element limits pilot pressure to 45 bar, safeguarding the control stage against transients. Switching time can be adjusted with the supply control feature coded S, enabling deliberate damping when needed in sensitive actuators. System fluid must meet cleanliness level ISO 4406 class 20/18/15 to avoid contamination-related wear of the precision spool fit.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
210 bar
Nominal Supply Voltage
24 VDC
Pilot Flow For Shortest Switching
35 l/min
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (X from P)
Porting Pattern
ISO 4401-08-08-0-05
Pressure Reducing Valve Pressure
45 bar (D3)
Switching Time Adjustment
Supply Control (S)
Throttle Orifice Diameter
1.0 mm (B10)
Valve Size
NG25
1620 Old Apex Road
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