Bosch Rexroth | M-3SMM6U3XF420
M-3SMM6U3X/F420
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The M-3SMM6U3X/F420 poppet valve belongs to the M-SEW Poppet Valves series from Bosch Rexroth and is intended to open or block flow paths in hydraulic automation circuits. It uses a direct operated design so line pressure acts directly on the valve element, and switching is performed by a manual hand lever that suits installations without electrical control. The valve conforms to size 6 (NG6) dimensions and fits subplates with the ISO 4401-03-02-0-05 mounting interface. Three ports are provided, organized according to the DIN 24340-A porting pattern that omits a locating hole. Two discrete switching positions referenced by symbol U allow operators to select flow or shut-off states, and the body withstands operating pressures up to 420 bar.
The unit handles a maximum flow rate of 25 l/min while requiring no more than 50 N of operating force at the lever, parameters that match medium-duty actuator circuits. A mechanical detent holds the chosen position until the operator moves the lever again, preventing unintended shifts. There is no check valve insert, so reverse flow is not restricted by an internal seat, and no throttle insert is provided, leaving pressure drops to external orifice components. Position monitoring hardware is not included, which simplifies the envelope for compact manifolds. Dynamic sealing relies on NBR material that is compatible with common mineral hydraulic oils and supports the specified pressure range.
Technical Specifications
Actuation Type
Manual (Hand Lever)
Check Valve Insert
None
Design
Direct Operated
Detent
Yes
Max Flow
25 l/min
Max Operating Force
50 N
Max Operating Pressure
420 bar
Mounting Interface
ISO 4401-03-02-0-05
Number Of Ports
3
Porting Pattern
DIN 24340-A (No Locating Hole)
Position Monitoring
None
Seal Material
NBR
Size
6 (NG6)
Switching Positions
2
Symbol
U
Throttle Insert
None
1620 Old Apex Road
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