Bosch Rexroth | M-4SEW6D3X420MG125N9K4B18V
M-4SEW6D3X/420MG125N9K4/B18V
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The M-4SEW6D3X/420MG125N9K4/B18V belongs to the M-SEW Poppet Valves series from Bosch Rexroth and is intended to switch oil flow in hydraulic automation circuits. It employs a 4/2 directional seat valve layout so two working ports can be alternately connected or blocked for precise actuator control. The component is built in nominal size 6 and follows the ISO 4401-03-02-0-05 port pattern, which simplifies mounting on standard subplates. Mineral oil is the designated hydraulic fluid, ensuring compatibility with typical industrial power units. The valve tolerates a maximum operating pressure of 420 bar on ports p, a, and b, while the t port is limited to 100 bar to protect return lines. Flow capacity reaches 25 l/min, and a built-in throttle with a 1.8 mm orifice stabilizes switching by limiting surge. These features make the unit suitable for compact yet high-pressure manifolds.
The solenoid section draws 30 W, enabling continuous energization because the duty cycle is rated at 100 percent. Even under extended activation, coil surface temperature is allowed up to 120 °C, which maintains insulation integrity. Electrical connection is handled through a DIN EN 175301-803 type K4 plug, providing quick wiring and standardized sealing. A concealed manual override designated N9 lets maintenance staff shift the valve without power for setup or fault clearing. Environmental protection equals IP65, so enclosure dust ingress and low-pressure water jets are resisted when the plug is fitted. FKM seals withstand aggressive oil additives and elevated temperatures encountered in demanding systems. Total mass is 2.3 kg, keeping manifold weight low and easing installation within mobile or stationary equipment.
Technical Specifications
Coil Power Consumption
30 W
Coil Surface Temperature Max
120 °C
Duty Cycle
100%
Electrical Connection
DIN EN 175301-803 (K4)
Hydraulic Fluid
Mineral Oil
Manual Override
Concealed (N9)
Maximum Flow
25 l/min
Maximum Operating Pressure (p/a/b)
420 bar
Maximum Pressure (t Port)
100 bar
Nominal Size
6
Port Pattern
ISO 4401-03-02-0-05
Protection Class
IP65
Seal Material
FKM
Switching Function
4/2 Directional Seat Valve
Throttle Orifice Diameter
1.8 mm (B18)
Weight
2.3 kg
1620 Old Apex Road
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