Bosch Rexroth | 3FREEZ6B-1X35L2G24K31A1MM
3FREEZ6B-1X/35L2G24K31A1MM
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The 3FREEZ6B-1X/35L2G24K31A1MM valve belongs to the 3FRE Flow Control Valves series and is manufactured by Bosch Rexroth. It meters mineral-oil–based hydraulic fluid in automated machinery to maintain consistent actuator velocity. A nominal size of 6 supports compact NG6 manifold layouts, while the ISO 4401-03-02-0-94 mounting pattern lets the unit drop into standard subplates without modification. The valve withstands working pressures up to 250 bar so it can be placed on high-pressure supply lines. It delivers a nominal flow of 35 l/min at an 8 bar differential, providing predictable throughput for medium-flow circuits. A linear flow characteristic ensures proportional change between spool position and volume, simplifying loop tuning. NBR seals contain the HL and HLP oils defined by DIN 51524, preventing leakage under cyclic loading.
Integrated electronics on the 3FREEZ6B-1X/35L2G24K31A1MM accept a 0 to +10 V setpoint and drive the spool through an inductive position transducer for closed-loop flow regulation. The circuitry runs from a 24 V DC supply, with power and signal lines carried by a 6P+PE interface that ends in a unit plug to DIN 43563-AM6; this standardized connector reduces wiring errors during service. Because the design has no external closing fixture, isolation must be provided elsewhere in the circuit, and the absence of a non-return valve allows unrestricted reverse flow when the command reverses. These features concentrate control functions inside the valve body, reduce manifold complexity, and support compact installations where precise, bidirectional flow control is needed.
Technical Specifications
Connector Type
Unit Plug (DIN 43563-AM6)
Electrical Connection
6P+PE
External Closing Fixture
None
Flow Characteristic
Linear
Hydraulic Fluid
Mineral Oils (HL, HLP) DIN 51524
Maximum Working Pressure
250 bar
Mounting Interface
ISO 4401-03-02-0-94
Nominal Flow Rate
35 l/min (Δp = 8 bar)
Nominal Size
6 (NG6)
Non-return Valve
None
On-board Electronics
Yes
Position Transducer
Inductive
Seals
NBR
Setpoint Input
0 to +10 V (A1)
Supply Voltage
24 V DC
1620 Old Apex Road
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