Bosch Rexroth | 3FREZ6B-1X2-6L2G24-27Z4MM
3FREZ6B-1X/2 6L2G24-27Z4MM
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The 3FREZ6B-1X/2 6L2G24-27Z4MM is manufactured by Bosch Rexroth for the 3FRE Flow Control Valves series and is intended to meter hydraulic flow in automated machinery. It works in position control mode so the spool follows command signals to hold a precise opening. With a nominal size of 6 (NG6) it fits standard compact manifolds, and its linear flow characteristic maintains proportional response across the stroke. The assembly tolerates up to 250 bar, allowing placement in high-pressure circuits without additional relief devices. Subplate attachment on the ISO 4401-03-02-0-94 interface shortens installation time and supports quick replacement. Residual oil is routed through port P as a third way to prevent back pressure when the valve is closed. The design is shipped without a non-return valve, leaving reverse-flow blocking to external checks where necessary.
The unit contains on-board electronics that drive the solenoid directly and run from a 24 V DC supply, removing the need for separate cards in the control cabinet. Electrical terminations use a 6P+PE pattern so six signals and a protective earth reach the electronics through one cable. A DIN 43563-AM6 plug-in connector provides the mating shell, enabling tool-free swap-out during service. Spool movement is tracked by an inductive position transducer, giving the controller continuous feedback for closed-loop accuracy. Command values enter on a 0 to +10 V setpoint input that defaults to a normally closed condition at 0 V to prevent unintended flow on startup. All dynamic seals are formed from NBR, which resists common mineral hydraulic oils and maintains elasticity over the valve’s working temperature range.
Technical Specifications
Control Mode
Position Control
Electrical Connection
6P+PE
Flow Characteristic
Linear (L)
Maximum Working Pressure
250 bar
Mounting Interface
ISO 4401-03-02-0-94
Mounting Type
Subplate Attachment
Nominal Size
6 (NG6)
Non-return Valve
Without
On-board Electronics
Yes (OBE)
Plug-in Connector
DIN 43563-AM6
Position Transducer
Inductive
Residual Flow Port
P (3rd Way)
Seal Material
NBR
Setpoint Input
0 to +10 V (NC at 0 V)
Supply Voltage
24 V DC
1620 Old Apex Road
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